Patent Publication Number: US-11641541-B2

Title: Acoustic input and output apparatus

Description:
CROSS REFERENCE TO RELATED APPLICATIONS 
     This application is a Continuation of U.S. patent application Ser. No. 17/455,010, filed on Nov. 15, 2021, which is a Continuation of International Application No. PCT/CN2021/089853, filed on Apr. 26, 2021, which claims priority of Chinese Patent Application No. 202020719606.1, filed on Apr. 30, 2020, Chinese Patent Application No. 202020720291.2, filed on Apr. 30, 2020, Chinese Patent Application No. 202020725495.5, filed on Apr. 30, 2020, Chinese Patent Application No. 202020725563.8, filed on Apr. 30, 2020, and Chinese Patent Application No. 202020720293.1, filed on Apr. 30, 2020, the entire contents of which are incorporated herein by reference. 
    
    
     TECHNICAL FIELD 
     The present disclosure relates to acoustics, in particular, relates to an acoustic input and output apparatus. 
     BACKGROUND 
     An acoustic input and output apparatus is an apparatus that facilitates sound input and sound output, such as a headset, glasses, or the like. The acoustic input and output apparatus may include a loudspeaker assembly and a sound-pickup assembly. The loudspeaker assembly may be configured to produce a sound signal, and the sound-pickup assembly may be configured to pick up a sound signal. In addition, the acoustic input and output apparatus may also include an assembly that keeps the acoustic input and output apparatus being in a stable contact with a user (e.g., when the acoustic input and output apparatus is a headset, a rear hook assembly and an ear hook assembly may be provided). However, at present, since a volume size of each assembly is relatively large, the overall size of the acoustic input and output apparatus is relatively large, and connections between various assemblies are easily to be invalid, which shortens the service life of the acoustic input and output apparatus and reduces the user experience. 
     The present disclosure provides an acoustic input and output apparatus. Stability and reliability of the overall structure of the acoustic input and output apparatus may be improved, the sound quality of the sound picked up by the sound-pickup assembly may be enhanced, and the comfort of the user experience may be improved. 
     SUMMARY 
     The embodiments of the present disclosure provide an acoustic input and output apparatus, including a loudspeaker assembly, a sound-pickup assembly configured to pick up a sound signal, a connection assembly including an elastic member, wherein a first end of the elastic member may connect to the loudspeaker assembly, and a second end of the elastic member may connect to the sound-pickup assembly, wherein the elastic member may be configured to cause an average amplitude attenuation rate of vibrations within a phonic frequency band generated by the loudspeaker assembly to be larger than or equal to 35% in a process that the vibrations transmit from the first end of the elastic member to the second end of the elastic member. 
     In some embodiments, the elastic member includes an elastic metal filament and plug-in parts connecting to the two ends of the elastic metal filament, respectively. One of the plug-in parts may be configured to match and plug in the sound-pickup assembly, and the other one of the plug-in parts may be configured to match and plug in the loudspeaker assembly. The plug-in parts may be connected to and plugged in the loudspeaker assembly. 
     In some embodiments, an elastic modulus of the elastic metal filament may be 70 GPa˜90 GPa. 
     In some embodiments, the connection assembly further may include an elastic cover layer covering a periphery of the elastic member. 
     In some embodiments, an elastic modulus of the elastic cover layer may be 0.8 GPa˜2 GPa. 
     In some embodiments, the loudspeaker assembly may include a first loudspeaker housing, a second loudspeaker housing, and a loudspeaker, wherein the first loudspeaker housing may be matched and connected to the second loudspeaker housing to form a containment space for accommodating the loudspeaker, wherein a first through-hole and a second through-hole may be arranged on the first loudspeaker housing at an interval, and the first through-hole and second through-hole may be in communication with the containment space. A wiring group of the sound-pickup assembly may traverse the first through-hole, the containment space, and the second through-hole. 
     In some embodiments, the loudspeaker assembly further may include a wire-fixing assembly configured to fix the wiring group of the sound-pickup assembly passing through the first through-hole and reaching the second through-hole. 
     In some embodiments, the wire-fixing assembly may include press-holding members arranged in the containment space, and the press-holding members may be configured to contact the wiring group of the sound-pickup assembly to reduce a vibration amplitude of the wiring group of the sound-pickup assembly. 
     In some embodiments, the press-holding members may include a first press-holding member covering the first through-hole. 
     In some embodiments, the press-holding members further may include a second press-holding member, and the first press-holding member and the second press-holding member may be sheet-shaped members. The first press-holding member and the second press-holding member may be arranged in a stacked manner. The second press-holding member may be spaced away from the first through-hole than the first press-holding member, and the hardness of the second press-holding member may be greater than the hardness of the first press-holding member. 
     In some embodiments, the loudspeaker assembly further may include a plurality of locating members arranged on the first loudspeaker housing at an interval, and the first press-holding member and the second press-holding member may be fixed to the first loudspeaker housing via the plurality of locating members. 
     In some embodiments, the plurality of locating members may be convex cylinders arranged on a periphery of the first through-hole and extending into the containment space. 
     In some embodiments, the second press-holding member may be fixedly connected with the plurality of locating members, and the first press-holding member may be fixed among the plurality of locating members. 
     In some embodiments, the first loudspeaker housing may include a bottom wall and a side wall connecting with each other, and the side wall may surround and connect with the bottom wall. The second loudspeaker housing may be arranged covering one side of the side wall away from the bottom wall to form the containment space. The first through-hole may be formed on the bottom wall, and the second through-hole may be formed on the sidewall. 
     In some embodiments, the bottom wall may include a first convex part protruding in a direction deviate from the containment space, and the first through-hole may be formed on the first convex part. The side wall may include a second convex part protruding in a direction deviate from the containment space, and the second through-hole may be formed on the second convex part. 
     In some embodiments, the sound-pickup assembly may be rotatable relative to the loudspeaker assembly. 
     In some embodiments, the connection assembly further may include a rotation member matched and connected to the first through-hole rotatably, and the sound-pickup assembly may be connected with the rotation member so as to rotate relative to the first loudspeaker housing. 
     In some embodiments, the rotation member may include a wire-guiding part and a rotation part connecting with each other. The rotation part may be inserted in the first through-hole. The sound-pickup assembly may be connected with the wire-guiding part to enable the wiring group of the sound-pickup assembly to pass through the wire-guiding part and enter the first through-hole via the rotation part. 
     In some embodiments, a damping groove may be arranged along a circumferential direction of the rotation part. The connection assembly further may include a damping member arranged in the damping groove. The damping member may contact an inner wall of the first through-hole to provide a rotational damping for the rotation part via contact friction. 
     In some embodiments, the rotation part may include a rotation main body, and a first stopping part and a second stopping part protruding from two ends of the rotation main body along radial directions of the rotation main body, respectively. The rotation main body may be inserted into the first through-hole. The first stopping part and the second stopping part may abut against two sides of the first loudspeaker housing, respectively, to restrict a movement of the rotation part relative to the first loudspeaker housing along an axial direction. The damping groove may be formed between the first stopping part and the second stopping part. 
     In some embodiments, the connection member further may include a rotation-limiting structure configured to restrict a rotation range of the rotation part relative to the first loudspeaker housing. 
     In some embodiments, the rotation-limiting structure may include a limiting groove arranged at an upper portion of the rotation part along a circumferential direction, and a limiting member arranged on the inner wall of the first through-hole and matched to the limiting groove. The limiting member may abut against two ends of the limiting groove, when the rotation part rotates relative to the first loudspeaker housing, to restrict the rotation part from rotating. 
     In some embodiments, the limiting groove may be arranged as an open-loop. 
     In some embodiments, the rotation range of the rotation part may be 0˜270 degrees. 
     In some embodiments, the wire-guiding part may be configured with a first hole segment, the rotation part may be arranged with a second hole segment, and the first hole segment communicates with the second hole segment. The sound-pickup assembly may be matched and connected to the first hole segment. The wiring group of the sound-pickup assembly may traverse the first hole segment and reach the first through-hole via the second hole segment. 
     In some embodiments, the loudspeaker assembly further may include a fixing member configured to restrict a movement of the sound-pickup assembly relative to the rotation member. 
     In some embodiments, the fixing member may include a fixing main body inserted into the second hole segment, and matched and connected to the first end of the elastic member to restrict the movement of the elastic member relative to the rotation member. 
     In some embodiments, the fixing member further may include a fixedly connection part arranged on one end of the fixing main body, and the first end of the elastic member may be configured with a fixedly adaptive connection part. The fixedly connection part may be matched and connected with the fixedly adaptive part. 
     In some embodiments, gaps may be formed at one end of the rotation part away from the wire-guiding part, and the gaps may communicate with the second hole segment. The fixing member further may include convex tables protruding from a periphery of the fixing main body, and the convex tables may be inserted into the gaps to fill the gaps. 
     In some embodiments, a count of the gaps may be at least two, and the gaps may divide the rotation part into at least two sub-members spaced apart from each other along the circumferential direction of the rotation part. 
     In some embodiments, the count of the gaps may be two, and the gaps may be arranged opposite to each other. A count of the convex tables may be two, correspondingly, and the convex tables may be arranged deviating from each other. The two convex tables may be inserted into the two gaps, respectively, so that the fixing member may be supported between two sub-members. 
     In some embodiments, the acoustic input and output apparatus may further include at least one ear hook assembly configured connect to the loudspeaker assembly so that the loudspeaker assembly may be in a stable contact with ears of a user. 
     In some embodiments, the at least one ear hook assembly may include an ear hook connection assembly and an ear hook housing. The ear hook assembly may be connected with the second through-hole and the ear hook housing, and the ear hook housing may be configured with an accommodating space for accommodating at least one of a battery assembly or a control circuit assembly. The wiring group of the sound-pickup assembly may pass through the second through-hole and enter the accommodating space via the ear hook connection assembly. 
     In some embodiments, the ear hook housing may include a first ear hook housing and a second ear hook housing matching the first ear hook housing, and the accommodating space may be formed when the first ear hook housing is connected with the second ear hook housing. 
     In some embodiments, the ear hook assembly may include a splicing assembly configured to restrict a movement of the first ear hook housing and the second ear hook housing in a splicing direction and a thickness direction. 
     In some embodiments, the splicing assembly may include a first splicing member and a second splicing member matched to the first splicing member, and the first splicing member and the second splicing member may be arranged on the first ear hook housing and the second ear hook housing, respectively. The first ear hook housing and the second ear hook housing may be relatively fixed in the splicing direction and the thickness direction when the first splicing member is matched and connected to the second splicing member. 
     In some embodiments, the first splicing member may include a first slot and a second slot arranged along a length direction of the first ear hook housing with a same opening direction. The second splicing member may include a first block and a second block protruding along a length direction of the second ear hook housing with a same extending direction so that the first block and the second block may be inset in the first slot and the second slot, respectively, along a same direction. 
     In some embodiments, the first splicing member further may include a first blocking part arranged at a first splicing edge of the first ear hook housing, and the second splicing member further may include a second blocking part arranged at a second splicing edge of the second ear hook housing. The first blocking part may abut against the second blocking part to restrict a relative movement of the first ear hook housing and the second ear hook housing along the length direction. 
     In some embodiments, the ear hook housing may be configured with a buttonhole and a power plug-in hole. 
     In some embodiments, the ear hook housing may include a housing panel contacting a user, a housing back panel deviate from the user, and a plurality of housing side panels connecting the housing panel and the housing back panel. The buttonhole and the power plug-in hole may be arranged on different housing side panels of the plurality of housing side panels. 
     In some embodiments, the ear hook connection assembly may include an ear hook connection member and a wire stuck part. The ear hook connection member may be arranged with a lead channel configured to lead the wiring group from the loudspeaker assembly, and the wire stuck part may be configured to stuck and stop the wiring group in a radial direction of the wiring group. 
     In some embodiments, a joint part may be arranged at one end of the ear hook connection member away from the ear hook housing. The wire stuck part may include a first wire stuck part and a second wire stuck part. The first wire stuck part may be arranged at the joint part, and the second wire stuck part may be arranged on the first ear hook housing. The wiring group may enter the accommodating space through the first wire stuck part, the lead channel, and the second wire stuck part in sequence. 
     In some embodiments, the ear hook assembly further may include an ear hook elastic cover layer covering at least a periphery of the ear hook connection member. 
     In some embodiments, the acoustic input and output apparatus further may include a rear hook assembly configured to connect the ear hook assembly so that the acoustic input and output apparatus may be in a stable contact with a back side of the head of the user. 
     In some embodiments, the rear hook assembly may include a rear connection member and inserting parts arranged at two ends of the rear connection member, and the inserting parts may be configured to facilitate a stable connection between the rear connection member and the ear hook assembly. 
     In some embodiments, a plug-in hole may be arranged on one side of the first ear hook housing away from the ear hook connection assembly. At least one inserting part may be configured with at least two groups of notches arranged at an interval in a length direction of the at least one inserting part. The plug-in hole may be matched and connected to one group of the at least two groups of notches to restrict a relative movement of the ear hook assembly and the rear hook assembly. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       The present disclosure is further illustrated in terms of exemplary embodiments. These exemplary embodiments are described in detail with reference to the drawings. These embodiments are not limited, in these embodiments, and the same number denotes the same structure. 
         FIG.  1    is a structural diagram illustrating a communication system of an acoustic input and output apparatus according to some embodiments of the present disclosure; 
         FIG.  2    is a block diagram illustrating a circuit of a communication system of an acoustic input and output apparatus according to some embodiments of the present disclosure; 
         FIG.  3    is a top plan view illustrating an overall structure of an acoustic input and output apparatus according to some embodiments of the present disclosure; 
         FIG.  4    is an exploded diagram illustrating an overall structure of an acoustic input and output apparatus according to some embodiments of the present disclosure; 
         FIG.  5    is a disassembly diagram illustrating a connection member of an acoustic input and output apparatus according to some embodiments of the present disclosure; 
         FIG.  6    is an exploded diagram illustrating a structure of a loudspeaker assembly of an acoustic input and output apparatus according to some embodiments of the present disclosure; 
         FIG.  7    is another exploded diagram illustrating a structure of a loudspeaker assembly of an acoustic input and output apparatus according to some embodiments of the present disclosure; 
         FIG.  8    is a structural diagram illustrating a fixing member, a rotation member, a connection member, and a sound-pickup assembly of an acoustic input and output apparatus according to some embodiments of the present disclosure; 
         FIG.  9    is a sectional view of A-A as a section line in  FIG.  3   ; 
         FIG.  10    is an exploded diagram of a structure of an ear hook assembly of an acoustic input and output apparatus according to some embodiments of the present disclosure; 
         FIG.  11    is another exploded diagram illustrating a structure of an ear hook assembly of an acoustic input and output apparatus according to some embodiments of the present disclosure; 
         FIG.  12    is a structural diagram illustrating a first ear hook housing and a second ear hook housing of an acoustic input and output apparatus according to some embodiments of the present disclosure; 
         FIG.  13    is another structural diagram illustrating a first ear hook housing and a second ear hook housing of an acoustic input and output apparatus according to some embodiments of the present disclosure; 
         FIG.  14    is a sectional view of B-B as a section line in  FIG.  3   ; 
         FIG.  15    is another structural diagram illustrating a first ear hook housing and a second ear hook housing of an acoustic input and output apparatus according to some embodiments of the present disclosure; 
         FIG.  16    is another exploded diagram illustrating a structure of an ear hook assembly of an acoustic input and output apparatus according to some embodiments of the present disclosure; 
         FIG.  17    is an exploded diagram illustrating a structure of a rear hook assembly of an acoustic input and output apparatus according to some embodiments of the present disclosure; 
         FIG.  18    is a structural diagram illustrating an ear hook assembly of an acoustic input and output apparatus according to some embodiments of the present disclosure. 
     
    
    
     Reference Numbers:  10 —acoustic input and output apparatus;  20 —intercom device;  30 —external communication module;  101 —first Bluetooth module;  102 —first NFC module;  201 —first external interface;  301 —second external interface;  302 —second Bluetooth module;  303 —second NFC module;  11 —loudspeaker assembly;  12 —ear hook assembly;  13 —rear hook assembly;  14 —battery assembly;  15 —control circuit assembly;  16 —sound-pickup assembly;  17 —sensor assembly;  18 —connection assembly;  110 —containment space;  111 —first loudspeaker housing;  112 —second loudspeaker housing;  113 —loudspeaker;  114 —fixing member;  115 —press-holding member;  116 —damping member;  1110 —first through-hole;  1111 —second through-hole;  1112 —bottom wall;  1113 —side wall;  1114 —first convex part;  1115 —second convex part;  1116 —limiting member;  11161 —convex block;  1117 —locating member;  11171 —convex cylinders;  1140 —wire-guiding hole;  1141 —fixing main body;  1142 —plug-in pin;  1143 —convex table;  1151 —first press-holding member;  1152 —second press-holding member;  120 —accommodating space;  121 —first ear hook housing;  122 —ear hook connection assembly;  123 —second ear hook housing;  1200 —window;  1201 —first splicing edge;  1202 —second splicing edge;  1210 —first sub-accommodation space;  1211 —first slot;  1212 —second slot;  1213 —first blocking part;  1215 —outer hole segment;  1216 —inner hole segment;  1217 —filling member;  1218 —plug-in hole;  1219 —second wire stuck part;  1221 —ear hook elastic metal filament;  1222 —joint part;  1223 —ear hook elastic cover layer;  1224 —first wire stuck part;  1225 —through-groove;  1230 —second sub-accommodating space;  1231 —first block;  1232 —second block;  1233 —power plug-in hole;  1234 —second blocking part;  1235 —button hole;  12181 —stuck connection parts;  12191 —second sub-wire stuck part;  12221 —end part;  12241 —first sub-wire stuck part;  131 —rear hook elastic metal filament;  132 —rear hook elastic cover layer;  133 —inserting parts;  1331 —notches;  151 —circuit board;  152 —power supply interface;  153 —button;  154 —antenna;  180 —fixing hole;  181 —connection member;  1811 —elastic member;  18111 —elastic connecting rod;  18113 —elastic metal filament;  182 —plug-in parts;  183 —elastic cover layer;  184 —rotation member;  1841 —wire-guiding part;  1842 —rotation part;  1843 —damping groove;  18441 —limiting groove;  18410 —first hole segment;  18420 —second hole segment;  18421 —rotation main body;  18422 —first stopping part;  18423 —second stopping part;  18424 —gaps;  18425 —sub-member. 
     DETAILED DESCRIPTION 
     In order to illustrate technical solutions of the embodiments of the present disclosure more clearly, the following briefly illustrates drawings in the illustration of the embodiments. Drawings in the following illustration are merely some examples or embodiments of the present disclosure. For those skilled in the art, the present disclosure may be applied to other similar scenarios in accordance with the drawings without creative works. Unless obviously obtained from the context or the context illustrates otherwise, the same number in the drawings refers to the same structure or operation. 
     It should be understood that “system”, “apparatus”, “unit”, and/or “module” used herein are a method for distinguishing different components, elements, members, parts, or assemblies of different levels. However, if other words may achieve the same purpose, the words may be replaced by other expressions. 
     As used in the disclosure and the appended claims, the singular forms “a,” “an,” and “the” include plural referents unless the content clearly dictates otherwise. In general, the terms “comprising” and “including” only prompt steps and elements that are explicitly identified, and these steps and elements do not constitute an exclusive list. Methods or apparatus may also include other steps or elements. 
     Flowcharts are used in the present disclosure to illustrate the operations performed by the system according to some embodiments of the present disclosure. It should be understood that the front or rear operations may not be necessarily performed exactly in order. On the contrary, each step may be performed in reverse or simultaneously. At the same time, other operations may also be added to the procedures, or a certain step or several steps may be removed from the procedures. 
     The present disclosure provides a communication system of an acoustic input and output apparatus. As shown in  FIG.  1    and  FIG.  2   , in some embodiments, the communication system may include an acoustic input and output apparatus  10 , an intercom device  20 , and an external communication module  30 . 
     The acoustic input and output apparatus  10  may refer to an apparatus having both a sound input function and an output function. In some embodiments, the acoustic input and output apparatus  10  may be divided into bone conduction and air conduction according to the way in which the sound is input and output. Taking a loudspeaker assembly as an example, a bone conduction loudspeaker may convert audio signals into mechanical vibrations with different frequencies. A human bone may be configured as a medium for transmitting the mechanical vibrations, and further transmitting sound waves to an auditory nerve, so that a user may receive sound without passing through an external auditory canal and a tympanic membrane of an ear of the user. The air conduction loudspeaker may change the air density by pushing the air to vibrate so that the user may hear the sound. In the embodiment, the acoustic input and output apparatus  10  may have a function as a Bluetooth. As shown in  FIG.  2   , the acoustic input and output apparatus  10  may include a first Bluetooth module  101 . The first Bluetooth module  101  may be configured to implement a Bluetooth communication function. 
     The intercom device  20 , i.e., a walkie-talkie, may be a terminal device of cluster communication or a wireless communication device of mobile communication. In general, the walkie-talkie may convert an electrical signal of the audio signals into a radio-frequency carrier signal through a transmitting assembly. The radio-frequency carrier signal may be further transmitted through an antenna via amplification, filtering, or the like, so as to transmit the user&#39;s voice. The antenna may receive an input signal processed through corresponding conversion, filtering, amplification, mixing, or the like, to form an audio signal, and the audio signal may be played by the loudspeaker assembly, so that the user can hear the audio signals sent by other intercom devices. The intercom device  20  in the embodiment may be an existing intercom device, and components and structures of the intercom device  20  are not described in detail herein. 
     In some embodiments, the intercom device  20  may not support the Bluetooth function. In order to enable the acoustic input and output apparatus  10  to have an effective Bluetooth connection with the intercom device  20 , an external communication module  30  may be used as a Bluetooth communication medium between the acoustic input and output apparatus  10  and the intercom device  20 . 
     In some embodiments, the intercom device  20  may include a first external interface  201 . The intercom device  20  may provide the first external interface  201  for extending the function of the intercom device  20 , and different functions may be achieved by connecting different external modules. External terminals may provide programs for the intercom device  20  via the first external interface  201 . The first external interface  201  may include a plurality of contact points spaced at an interval, such as 7 contact points. 
     In some embodiments, the external communication module  30  may include a second external interface  301  and a second Bluetooth module  302 . The external communication module  30  may be detachably arranged on the intercom device  20 , for example, the external communication module  30  may be fixed to the intercom device  20  by snapping. The second external interface  301  may also have contact points the same as the first external interface  201 . When the external communication module  30  is installed on the intercom device  20 , the first external interface  201  may be connected to the second external interface  301 . The external communication module  30  may be coupled to the intercom device  20  through the first external interface  201  and the second external interface  301 . The intercom device  20  may be configured with a Bluetooth function through the external communication module  30 . 
     As shown in  FIG.  2   , in some embodiments, the intercom device  20  may establish a Bluetooth connection with the acoustic input and output apparatus  10  through the external communication module  30 . After the Bluetooth connection between the intercom device  20  and the acoustic input and output apparatus  10  is established through the external communication module  30 , the acoustic input and output apparatus  10  may be used to control the intercom device  20 . For example, the acoustic input and output apparatus  10  may be used to answer audio signals received by the intercom device  20 . The acoustic input and output apparatus  10  may also be used to transmit corresponding voice. The acoustic input and output apparatus  10  may also control other functions of the intercom device  20 . The intercom device  20  may also control the acoustic input and output apparatus  10 . 
     In some embodiments, in order to facilitate a rapid Bluetooth connection between the acoustic input and output apparatus  10  and the intercom device  20 , a Bluetooth address may be exchanged between the acoustic input and output apparatus  10  and the intercom device  20  quickly to facilitate a fast pairing. As shown in  FIG.  2   , the acoustic input and output apparatus  10  may also have a near-field communication (NFC) function and may include a first NFC module  102 , which may be configured to implement the near-field communication function. The external communication module  30  may also include a second NFC module  303 , which may enable the intercom device  20  without the NFC near-field communication function to realize near-field communication. 
     Specifically, the acoustic input and output apparatus  10  and the intercom device  20  may exchange the Bluetooth address by the near-field communication of the first NFC module  102  and the second NFC module  303 , so that a Bluetooth connection may be established between the first Bluetooth module  101  and the second Bluetooth module  302  by a Bluetooth pairing. To exchange the Bluetooth address, the following ways may be used. 
     The first way: the acoustic input and output apparatus  10  may transmit the Bluetooth address to the intercom device  20 , which may save the time that the intercom device  20  searches and selects the acoustic input and output apparatus  10 . That is, the first NFC module  102  may store or acquire the Bluetooth address of the first Bluetooth module  101 . When the first NFC module  102  and the second NFC module  303  perform a near-field communication, the first NFC module  102  may transmit the Bluetooth address to the second NFC module  303 , thereby enabling the external communication module  30  to acquire the Bluetooth address of the first Bluetooth module  101 . Accordingly, the exchange of the Bluetooth address may be implemented, and the fast pairing and connection may also be implemented. 
     The second way: the intercom device  20  may send the Bluetooth address to the acoustic input and output apparatus  10 , which may save the time that the acoustic input and output apparatus  10  searches and selects the intercom device  20 . That is, the second NFC module  303  may store or acquire the Bluetooth address of the second Bluetooth module  302 . When the first NFC module  102  and the second NFC module  303  perform a near-field communication, the second NFC module  303  may transmit the Bluetooth address of the second Bluetooth module  302  to the first NFC module  102 , thereby enabling the acoustic input and output apparatus  10  to acquire the Bluetooth address of the second Bluetooth module  302 . Accordingly, the exchange of the Bluetooth address may be implemented, and the fast pairing and connection may also be further implemented. 
     The third way: the intercom device  20  and the acoustic input and output apparatus  10  may send the Bluetooth address to each other actively, thereby saving the time to search and select each other, and achieving the fast pairing and connection. That is, the first NFC module  102  may store or acquire the Bluetooth address of the first Bluetooth module  101 , and the second NFC module  303  may store or acquire the Bluetooth address of the second Bluetooth module  302 . When the first NFC module  102  and the second NFC module  303  perform a near-field communication, the first NFC module  102  and the second NFC module  303  may exchange the Bluetooth address of each other to implement the exchange of the Bluetooth address. 
     A rapid Bluetooth connection may be established between the intercom device  20  and the first NFC module  102  of the acoustic input and output apparatus  10  through the second NFC module  303  of the external communication module  30 , so that the intercom device  20  may match different acoustic input and output apparatuses  10  quickly. Taking industrial field operations as an example, different staff members may be configured with different acoustic input and output apparatuses  10 . For example, two staff members may share an intercom device  20 , the two staff members may use the shared intercom device  20  alternately when they worked in relays, and the intercom device  20  may be connected through the acoustic input and output apparatus  10  quickly. When a staff member is on duty, “one-touch to connect” may be implemented through the acoustic input and output apparatus  10  and the intercom device  20 , and the communication system composed of the intercom device  20  and the acoustic input and output apparatus  10  may be used. When the staff member is off duty and the other staff member is on duty, the other staff member may also implement “one-touch to connect” through the acoustic input and output apparatus  10  and the intercom device  20 . A logic including “independent” and “shared” may be formed by the communication system composed of the intercom device  20  and the acoustic input and output apparatus  10 . The “independent” may indicate that everyone may use the acoustic input and output apparatus  10  independently, and the “shared” may indicate that the intercom device  20  may be shared. The communication system of the present embodiment may also identify the acoustic input and output apparatus  10  individually, and multiple individuals may use a same intercom device  20 . Fast switching and other functions such as checking attendance and identifying personal identities may be realized. 
     The intercom device  20  and the acoustic input and output apparatus  10  may perform a Bluetooth matching to establish the Bluetooth connection quickly through the NFC near-field communication, and the user&#39;s ears may be released when the user wears the acoustic input and output apparatus  10 . By transmitting sound through bone conduction, the effect of noise on the sound transmission may be reduced and the quality of voice communication may be improved. In this way, playing the audio signal received by the intercom device  20  through the acoustic input and output apparatus  10 , or picking up sound transmitted to other intercom devices via the intercom device  20  through the acoustic input and output apparatus  10  may avoid broadcasting of sound and protect the privacy of the user. For application scenarios such as factory workshops, when using the acoustic input and output apparatus  10  for intercom communication, the user may also notice changes in the surrounding environment, which may ensure the security of the user. 
     For the acoustic input and output apparatus  10 , the first NFC module  102  may be a passive NFC module. The first NFC module  102  may store the Bluetooth address of the first Bluetooth module  101 , and the Bluetooth address of the first Bluetooth module  101  may be transmitted to the second NFC module  303 . The first NFC module  102  may also be an active NFC module, which may transmit the Bluetooth address of the first Bluetooth module  101  and receive the Bluetooth address of the second Bluetooth module  302  transmitted by the second NFC module  303 . Similarly, the second NFC module  303  may also be a passive NFC module or an active NFC module. 
     The first NFC module  102  may be attached on a battery assembly  14  of the acoustic input and output apparatus  10  for the convenience of installation. The structure may be simple so as to save the space. When the Bluetooth connection to the intercom device  20  is required, a fast Bluetooth pairing may be performed by placing the battery assembly  14  of the acoustic input and output apparatus  10  close to the external communication module  30  of the intercom device  20 . 
     In some embodiments, in order to facilitate a control between the intercom device  20  and the acoustic input and output apparatus  10  and realize the switching of related functions between the intercom device  20  and the acoustic input and output apparatus  10  automatically, sensing and controlling may be carried out by a corresponding sensor. An example is provided in the following descriptions. As shown in  FIG.  2   , the acoustic input and output apparatus  10  may include a sensor assembly  17  for detecting whether the acoustic input and output apparatus  10  is worn by a user. Specifically, the sensor assembly  17  may include, for example, an optical sensor, which may detect whether the acoustic input and output apparatus  10  is worn by transmitting and/or receiving a corresponding optical signal. The optical sensor, for example, a low beam sensor emitting a respective optical signal, may emit light by reflecting the optical signal when the acoustic input and output apparatus  10  is worn, and may not reflect light when the acoustic input and output apparatus  10  is not worn. The low beam sensor may detect whether the acoustic input and output apparatus  10  is worn or perform a distance measurement according to whether reflected light is received. The low beam sensor may be, for example, an infrared low beam sensor. The sensor assembly  17  may also include an acceleration sensor, a gravity sensor, a touch sensor, or the like. 
     When the acoustic input and output apparatus  10  and the intercom device  20  are in the Bluetooth connection state and the sensor assembly  17  detects that the acoustic input and output apparatus  10  is worn by a user, the acoustic input and output apparatus  10  may be controlled to pick up sound and/or play voice, and the intercom device  20  may not be used to pick up sound and/or play voice. That is, when the acoustic input and output apparatus  10  is worn by a user, the communication system may pick up sound through a microphone of the acoustic input and output apparatus  10  and/or play voice through a loudspeaker  113 . When the sensor assembly  17  detects that the acoustic input and output apparatus  10  is not worn by a user, the intercom device  20  may be controlled to pick up sound and/or play voice, and the acoustic input and output apparatus  10  may not be used to pick up sound and/or play voice. That is, when the acoustic input and output apparatus  10  is not worn, the communication system may pick up sound through a microphone of the intercom device  20  and/or play voice through the loudspeaker  113 . 
     Based on the descriptions above, when the acoustic input and output apparatus  10  is not worn, the acoustic input and output apparatus  10  may not able to pick up sound or play voice effectively, or the user may not hear the voice transmitted by the acoustic input and output apparatus  10 . At this time, the intercom device  20  may be used to pick up sound and/or play voice, thus the played voice may be heard clearly and the sound may be picked up effectively. When the acoustic input and output apparatus  10  is worn, the acoustic input and output apparatus  10  may be used to pick up sound and/or play voice, so that the user may send or hear the voice. Detecting whether the acoustic input and output apparatus  10  is worn through the sensor assembly  17  may be convenient for the communication system to realize the automatic switching as mentioned above, and avoid omission of voice information, which may adapt to different application scenarios and improve working efficiency. 
       FIG.  3    is a top view illustrating an overall structure of an acoustic input and output apparatus according to some embodiments of the present disclosure. As shown in  FIG.  3   , in some embodiments, the acoustic input and output apparatus  10  may include loudspeaker assemblies  11 , a sound-pickup assembly  16 , and a connection assembly  18 . The loudspeaker assemblies  11  may be configured to produce a sound signal, the sound-pickup assembly  16  may be configured to pick up a sound signal, and the connection assembly  18  may be configured to connect the loudspeaker assemblies  11  and the sound-pickup assembly  16  to transmit the sound signal. 
     The loudspeaker assemblies  11  may be configured to convert a signal including sound information into an acoustic signal (or a voice signal). For example, the loudspeaker assemblies  11  may generate mechanical vibrations to transmit sound waves (e.g., sound signals) in response to receiving a signal including sound information. In some embodiments, the loudspeaker assemblies may include vibration elements and/or vibration transmission elements connected to the vibration elements (e.g., at least a part of a housing vibration transmission piece of the acoustic input and output apparatus  10 ). The loudspeaker assemblies  11  may generate the mechanical vibrations with energy conversion, and the loudspeaker assemblies  11  may convert the signal including sound information to the mechanical vibrations. The conversion may include a variety of different types of energy coexistence and conversion. For example, an electrical signal (i.e., the signal including sound information) may be directly converted into the mechanical vibrations through transducers (not shown in the figure) in the vibration elements (not shown in the figure) of the loudspeaker assemblies  11 . The sound waves may be transmitted by the vibration transmission elements of the loudspeaker assemblies  11  conducting the mechanical vibrations. As another example, the sound information may be included in an optical signal, and a particular transducer may implement a process of converting the optical signal into a vibration signal. Other energy types that may be coexisting and converted during the operation of the transducers may include thermal energy, magnetic field energy, or the like. The energy conversion method of the transducers may include dynamic, electrostatic, piezoelectric, dynamic iron type, pneumatic, electromagnetic, or the like. 
     In some embodiments, the loudspeaker assemblies  11  may be divided into bone conduction loudspeaker assemblies and air conduction loudspeaker assemblies according to the sound producing principle of the loudspeaker assemblies. In some embodiments, a loudspeaker assembly  11  may include one or more bone conduction loudspeakers. In some embodiments, a loudspeaker assembly  11  may include one or more air conduction loudspeakers  113 . In some embodiments, a loudspeaker assembly  11  may include a combination of one or more bone conduction loudspeakers and one or more air conduction loudspeakers  113  at the same time. 
     In some embodiments, the sound-pickup assembly  16  may include one or more microphones. In some embodiments, one or more microphones may be air conduction microphones. In some embodiments, one or more microphones may be bone conduction microphones. In some embodiments, one or more microphones may be a combination of bone conduction microphones and air conduction microphones. 
     The microphones may be configured to pick up the acoustic signal (also referred to as a voice signal) and convert the acoustic signal to the signal including sound information (e.g., an electrical signal). For example, the microphones may pick up the mechanical vibrations generated when the voice signal provides a voice signal and convert the mechanical vibrations into an electrical signal. For the convenience of description, the mechanical vibrations generated when the user provides a voice signal may be referred to as the mechanical vibrations. In one or more embodiments of the present disclosure, the bone conduction microphone may be described as an example. 
     The bone conduction microphone may be a pickup device (e.g., a voice acquisition device) capable of converting the vibration signal into an electrical signal. The vibration signal may refer to the signal generated by the vibrations of the user&#39;s body part when the user speaks. For the convenience of understanding, the bone conduction microphone may be understood as a microphone device that is sensitive to a bone conduction sound transmitted by vibrations, while a microphone that is not sensitive to an air conduction sound transmitted by air. 
     In some embodiments, when the user wears the acoustic input and output apparatus  10 , the bone conduction microphone may not be in contact with the human body directly. The vibration signal (e.g., facial vibrations) generated when the user speaks may be transmitted to the loudspeaker assemblies  11 , and transmitted to the bone conduction microphone through the loudspeaker assemblies  11 . The bone conduction microphone further may convert the body vibration signal to an electrical signal including voice information. In some embodiments, when the user wears the acoustic input and output apparatus  10 , the bone conduction microphone may be in contact with the human body directly, and the vibration signal generated when the user speaks may be transmitted to the bone conduction microphone directly. 
     In some embodiments, the acoustic input and output apparatus  10  may be a headset. For the convenience of description, the present disclosure describes the acoustic input and output apparatus  10  as an example of a headset. In some embodiments, the acoustic input and output apparatus  10  may be a bone conduction headset, and the sound may be input and output through the bone conduction. 
     In some embodiments, the sound-pickup assembly may be connected to a loudspeaker assembly, and a wiring group of the sound-pickup assembly may be electrically connected to the remaining elements (e.g., the battery assembly) of the bone conduction headset via the loudspeaker assembly. In some embodiments, the sound-pickup assembly  16  may be physically connected with the loudspeaker assembly  11  through, for example, a hinged connection, a clip connection, a welding connection, an integral molding, or the like. 
     In some embodiments, the sound-pickup assembly  16  may be connected to the loudspeaker assembly  11  through a connection assembly  18 . The connection assembly  18  may refer to a connection structure for physically connecting the components of the acoustic input and output apparatus  10 . In some embodiments, the connection assembly  18  may include a connection member configured to connect the sound-pickup assembly  16  and the loudspeaker assembly  11 . 
     In some embodiments, when the sound-pickup assembly is connected to the loudspeaker assembly through the connection member. For the convenience of description, the sound-pickup assembly and the connection member may be regarded as an entirety. Further, the sound-pickup assembly and the connection member as an entirety may be regarded as a stick assembly. In some embodiments, the bone conduction headset may also include the stick assembly, and the stick assembly may be configured to pick up the sound. The stick assembly may be configured to connect the loudspeaker assembly  11  and the sound-pickup assembly and have a structure receiving the sound signal generated by the user. In some embodiments, the number or count of the stick assembly may be one, which is connected to one of the two loudspeaker assemblies  11 . For example, the stick assembly may be connected to the loudspeaker assembly  11  corresponding to the battery assembly  14 . Certainly, in other embodiments, each loudspeaker assembly  11  may be connected to a stick assembly. 
     In some embodiments, the connection member  181  may be a rigid member. The rigid member may be a member that does not have elasticity or whose elasticity is negligible. In some embodiments, the connection member  181  may be made of stainless steel, carbon fiber, aluminum alloy, or the like. In some embodiments, the connection member  181  may have a certain shape. For example, the connection member  181  may be a slender strip (e.g., a stick shape). In some embodiments, the connection member  181  may have a certain radian. As shown in  FIG.  4   , the connection member  181  may be a stick member having a certain radian. 
     In some embodiments, the loudspeaker assemblies  11  may cause the user to hear the sound by generating the mechanical vibrations to transmit the sound waves. The way that the loudspeaker assemblies  11  transmit the sound waves may include air conduction and bone conduction. Regardless of whether the sound waves are transmitted through bone conduction or air conduction, the sound-pickup assembly may be directly or indirectly connected to the loudspeaker assembly  11 , and the vibrations generated by the loudspeaker assembly  11  may have an impact on the sound-pickup assembly to reduce the sound quality of the sound picked up by the sound-pickup assembly. 
     Specifically, taking the bone conduction loudspeaker as an example, the mechanical vibrations of the connection assembly  18  and the loudspeaker housing may be generated when the bone conduction loudspeaker generates sound. The connection assembly  18  and the loudspeaker housing may transmit the mechanical vibrations to the sound-pickup assembly. The microphones of the sound-pickup assembly may generate corresponding mechanical vibrations after receiving the mechanical vibrations and generate the signal including sound information (e.g., an electrical signal) based on the mechanical vibrations. As stated above, since the sound-pickup assembly is directly or indirectly connected to the connection assembly  18  and the loudspeaker housing, the mechanical vibrations of the connection assembly  18  and the loudspeaker housing may be generated when the loudspeaker  113  transmits sound waves. The connection assembly  18  and the loudspeaker housing may transmit the mechanical vibrations to the sound-pickup assembly, and the microphones of the sound-pickup assembly may generate corresponding mechanical vibrations after receiving the mechanical vibrations and generate the signal including sound information (e.g., an electrical signal) based on the mechanical vibrations. 
     Therefore, at least part of the mechanical vibrations generated by the loudspeaker assemblies  11  may be transmitted to the microphones of the sound-pickup assembly to cause the mechanical vibrations of the microphones of the sound-pickup assembly. When the microphones of the sound-pickup assembly and the loudspeaker assemblies  11  operate at the same time, the loudspeaker assemblies  11  may vibrate to transmit a voice signal (e.g., music), while the microphones of the sound-pickup assembly are receiving the voice signal (i.e., receiving a voice signal when the user speaks through picking up the vibrations of the skin, or the like, when the user speaks). The microphones of the sound-pickup assembly may receive a variety of mechanical vibrations at the same time. The microphones of the sound-pickup assembly may receive the voice signals transmitted by the loudspeaker assemblies  11  other than the voice signal transmitted by the user, thereby affecting the quality of the voice signal picked up by the microphones. In some embodiments, in order to reduce the impact of the mechanical vibrations generated by the loudspeaker assemblies  11  on the sound-pickup assembly, the connection member  181  may be configured to have a certain elasticity to reduce the magnitude of the vibrations. 
     In some embodiments, the connection member  181  may be an elastic member  1811 . The strength of the mechanical vibrations transmitted from the loudspeaker assemblies  11  may be reduced through the elasticity of the elastic member  1811 , thereby increasing the quality of the voice signal picked up by the microphones. As shown in  FIG.  5   , in some embodiments, the elastic member  1811  may be an elastic connecting rod  18111 , and the stick assembly may include the elastic connecting rod  18111  and the sound-pickup assembly  16 . One end of the elastic connecting rod  18111  may be connected to the loudspeaker assembly  11 . The other end of the elastic connecting rod  18111  may be connected to the sound-pickup assembly  16 . 
     In some embodiments, the sound-pickup assembly  16  may have one or more microphones. For example, the number of microphones of the sound-pickup assembly  16  may be greater than or equal to 2, and the microphones may be spaced apart. For example, a microphone may be arranged at an end of the sound-pickup assembly  16  away from the loudspeaker assembly  11 , and other microphones may be arranged on one side that the sound-pickup assembly  16  is connected to the end, which may facilitate a cooperation among multiple microphones, thus reducing the noise and improving the quality of the picked-up sound. The loudspeaker assemblies  11  may convert the audio into the mechanical vibrations, that is, when the loudspeaker assemblies  11  are playing corresponding audio, a phonic band corresponding to the audio may cause a loudspeaker  113  to generate the corresponding vibrations. 
     In some embodiments, the elastic member  1811  may be configured to cause the vibrations of the phonic band generated by the loudspeaker assemblies  11  to attenuate when the vibrations are transmitted from a first end of the elastic member  1811  (e.g., the elastic connecting rod  18111  of the elastic member  1811 ) to a second end of the elastic member  1811 . Specifically, the vibrations of a phonic band generated by the elastic connecting rod  18111  and the vibrations of the phonic band generated by the loudspeaker assembly  11  may be passed from the first end of the elastic connecting rod  18111  (i.e., one end connected to the loudspeaker assembly  11 ) to the elastic connecting rod  18111 . The average amplitude attenuation rate at the end (i.e., one end connected to the sound-pickup assembly  16 ) may be larger than or equal to 35%. In some embodiments, the average amplitude attenuation rate may be larger than or equal to 45%. In some embodiments, the average amplitude attenuation rate may be larger than or equal to 50%. In some embodiments, the average amplitude attenuation rate may be larger than or equal to 55%. In some embodiments, the amplitude attenuation rate may be larger than or equal to 60%. In some embodiments, the amplitude attenuation rate may be larger than or equal to 70%. 
     In actual use, the mechanical vibrations generated by the loudspeaker assemblies  11  of the acoustic input and output device  10  may cause a negative effect on the pickup effect of the stick assembly, such as an echo. More details regarding the effects of loudspeaker assemblies  11  for the stick assembly may be found in other embodiments of the present disclosure, which is described here. Based on the reasons mentioned above, the elastic connecting rod  18111  may be configured to cause the average amplitude attenuation rate of the vibrations within the phonic band generated by the loudspeaker assemblies  11  to be larger than or equal to 35% in a process that the vibrations transmits from one end of the elastic connection rod  18111  to the other end of the elastic connection rod  18111 , so that the elastic connection rod  18111  may effectively absorb the vibrations during vibration transmission and reduce the vibration amplitude of the elastic connecting rod  18111  transmitted from one end to the other end, thereby reducing the vibrations generated by the loudspeaker assemblies  11 , which causes the vibrations of the sound-pickup assembly  16 , effectively reducing the influence of the vibrations of the loudspeaker assemblies  11  on the pickup effect of the sound-pickup assembly  16 , and improving the sound quality of the sound-pickup assembly. 
     In some embodiments, the attenuation of the vibration amplitude may be achieved by the structure of the elastic member  1811  and/or the material of the elastic member  1811 . In some embodiments, the elasticity of the elastic member  1811  may be provided by the structural design. The elastic member  1811  may be an elastic structure, even if the material of the elastic member  1811  may have high rigidity, the elasticity may also be provided by the structure of the elastic member  1811 . In some embodiments, the shape of the elastic member  1811  may include, but may not be limited to, a sheet shape, a strip shape, a column shape, a spring-like structure, a ring, a ring-like cross-sectional structure, or the like. In some embodiments, the elasticity of the elastic member  1811  may be determined by the material of which the elastic member  1811  is made. For example, the elastic member  1811  may be made of nickel-titanium alloy, and the nickel-titanium alloy has a strong elasticity and a shape memory ability. The nickel-titanium alloy may automatically return to a state that is close to the original shape when the nickel-titanium alloy is deformed. 
     As shown in  FIG.  5   , for example, regarding the elastic member  1811  as the elastic connecting rod  18111 , in some embodiments, the elastic connecting rod  18111  may include an elastic metal filament  18113  configured to provide elasticity, and the elastic metal filament  18113  may be configured as a skeleton of the elastic connecting rod  18111  to support the elastic connecting rod  18111  to form a fixed shape. The elastic connecting rod  18111  may also include plug-in parts  182  connecting to two ends of the elastic metal filament  18113 , respectively. That is, two ends of the elastic metal filament  18113  may be connected with a plug-in part  182 , respectively. One of the plug-in parts  182  may be configured to match and plug in the sound-pickup assembly  16 . The other plug-in parts  182  may be configured to match and plug in the loudspeaker assembly  11 . In some embodiments, the plug-in parts  182  may be plug-in buckles, and plug-in slots corresponding to the buckles may be arranged on the loudspeaker assemblies  11  and the sound-pickup assembly  16 . In some embodiments, the plug-in parts  182  may be magnets. Magnetic conductors may be arranged on the loudspeaker assemblies  11  and the sound-pickup assembly  16 , and the loudspeaker assemblies  11  and the sound-pickup assembly  16  may be connected to the plug-in parts  182  through a magnetic force. In some embodiments, the plug-in structures of the two plug-in parts  182  may be the same or different. For example, the plug-in parts  182  connected to the loudspeaker assemblies  11  may be the plug-in buckles, and the plug-in parts  182  connected to the sound-pickup assembly  16  may be magnets. The interfaces may be matched to the plug-in structures corresponding to the sound-pickup assembly  16  and the loudspeaker assemblies  11 . In some embodiments, the plug-in parts  182  may be directly connected to the sound-pickup assembly  16  and the loudspeaker assemblies  11  through, for example, a hinged connection, a snap-joint connection, a welding connection, an integrally formed connection, or the like. In some embodiments, the elastic metal filament  18113  may be any suitable shape, which includes, but is not limited to, a strip shape, a columnar shape, a sheet shape. The present disclosure may not be limited herein, and the shape of the elastic metal filament  18113  may be determined according to the actual situation. 
     In some embodiments, the elastic metal filament  18113  may have a strong ability to recover from deformation, that is, after deformation, the elastic metal filament  18113  may return to the original shape. In some embodiments, the elastic modulus of the elastic metal filament  18113  may be 70 Gpa to 90 Gpa. In some embodiments, the elastic modulus of the elastic metal filament  18113  may be 75 Gpa to 85 Gpa. In some embodiments, the elastic modulus of the elastic metal filament  18113  may be 80 Gpa to 84 Gpa. In some embodiments, the elastic modulus of the elastic metal filament  18113  may be 81 Gpa to 83 Gpa. 
     In some embodiments, the material of the elastic metal filament  18113  may be spring steel, titanium, or the like. In some embodiments, the material of the elastic metal filament  18113  may be nickel-titanium alloy. Nickel-titanium alloy may have a strong capability to recover from deformation and improve a service life effectively. In the embodiment, by setting the elastic modulus of the elastic metal filament  18113  to be 70 Gpa to 90 Gpa, the elastic metal filament  18113  may have a good capability to absorb the vibrations, which may meet the requirements of the vibration absorbing capability for the connection member  181 , thereby improving the pickup quality of the sound-pickup assembly  162 . 
     It should be noted that, in addition to the metal material, a non-metallic material may be used as the material making the skeleton of the connection member  181 , for example, an elastic filament made of plastic, rubber, or other materials, may be used as a skeleton connected to the connection member  181 . 
     In some embodiments, if an elastic member  1811  is exposed to the outside, long-term usage may cause a loss of the elastic member  1811 . For example, the elasticity of the elastic member  1811  may be reduced, and the ability to restore from the deformation may also decline when the elastic member  1811  contacts with rainwater and rubs against the user&#39;s skin, which may also reduce the service life of the elastic member  1811 . Therefore, in some embodiments, a structure may be arranged outside of the elastic member  1811  to protect the elastic member  1811 . 
     As shown in  FIG.  5   , in some embodiments, the connection assembly  18  may also include an elastic cover layer  183  covering the periphery of the elastic member  1811 . The elastic cover layer  183  may have a certain elasticity so that the average amplitude attenuation rate of the vibrations of the phonic frequency band generated by the loudspeaker assemblies  11  may be further reduced when the vibrations of the phonic frequency band is transmitted from the connection assembly to the sound-pickup assembly. In some embodiments, the elastic cover layer  183  may be a part of the elastic member  1811 , for example, the elastic cover layer  183  may be integrally formed with the elastic member  1811 . In some embodiments, the elastic cover layer  183  may be formed separately from the elastic member  1811  and then assembled. 
     For the convenience of description, for example, still taking the elastic member  1811  as the elastic connecting rod, specifically, the elastic connecting rod  18111  may include the elastic cover layer  183  covering the periphery of the elastic metal filament  18113 . In some embodiments, the elastic cover layer  183  may only cover part of the periphery of the elastic metal filament  18113 . In some embodiments, the elastic cover layer  183  may cover the periphery of the elastic metal filament  18113 , that is, completely cover the elastic metal filament  18113 . In some embodiments, the elastic cover layer  183  may further cover part of the plug-in parts  182 , and may further protect the elastic metal filament  18113  and the plug-in parts  182  at the same time. In some embodiments, the material of the elastic cover layer  183  may be silica gel, rubber, plastic, or the like. In some embodiments, a lead channel (not shown in the figure) may be arranged on the elastic cover layer  183  along a length direction of the elastic cover layer  183  (such as the connection direction of the two plug-in parts  182  shown in  FIG.  5   ), and the lead channel and the elastic metal filament  18113  may be arranged in parallel and spaced apart. Buried wiring grooves communicating with the lead channel may be arranged on the plug-in parts  182  (not shown in the figure). The wiring group for connecting the sound-pickup assembly  16  may enter into the lead channel through the buried wiring grooves of adjacent plug-in parts  182 , and further enter into the loudspeaker assemblies  11  through the other plug-in part  182 . The wiring group may be configured to electrically connect the sound-pickup assembly  16  with other assemblies (e.g., a battery assembly  14  and a control circuit assembly  15 ). In some embodiments, the elastic modulus of the elastic cover layer  183  may be 0.5 Gpa to 2 Gpa. In some embodiments, the elastic modulus of the elastic cover layer  183  may be 0.8 Gpa to 1.5 Gpa. In some embodiments, the elastic modulus of the elastic cover layer  183  may be 1.2 Gpa to 1.4 Gpa. In the embodiment, by setting the elastic modulus of the elastic cover layer  183  to be 0.5 Gpa˜2 Gpa, and due to the elastic cover layer  183  covers the outside of the elastic metal filament  18113 , the vibrations transmitted outward by the elastic metal filament  18113  may be further absorbed, thereby forming the effect of internal and external coordinated vibration absorption, which may improve the vibration absorption effect of the stick assembly greatly, reduce the vibrations transmitted to the sound-pickup assembly  16  effectively, and improve the sound-pickup quality. 
     It should be noted that the description for the connection member  181  mentioned above may be only for convenience, and one or more embodiments of the present disclosure may not be limited to the scope of the present disclosure. It should be noted that, for those skilled in the art, after understanding the principle of the connection member  181 , various components may be arbitrarily combined, or one or more elements may be omitted without departing from the principle. For example, the elastic cover layer  183  may be omitted or replaced with a rigid housing. For example, when the connection member  181  is not the elastic member  1811 , or the elastic member  1811  is not the elastic connecting rod  18111 , the periphery of the connection member  181  may still be covered by the elastic cover layer  183 . For example, the elastic member  1811  may be an elastic connecting piece. Such variations are all within the protection scope of one or more embodiments of the present disclosure. 
     In some embodiments, the sound-pickup assembly may be electrically connected to other assemblies of the bone conduction headset to facilitate the controlling of the sound-pickup assembly by the user. For example, the user may choose to turn off the sound-pickup function of the sound-pickup assembly. As another example, the user may adjust the volume of the sound picked up by the sound-pickup assembly. In some embodiments, the sound-pickup assembly may include the wiring group electrically connected to other assemblies of the bone conduction headset. The sound-pickup assembly may be electrically connected to the remaining one or more assemblies of the bone conduction headset through the wiring group of the sound-pickup assembly  16 . The assemblies mentioned above may be connected to the loudspeaker assemblies  11 . Therefore, the wiring group of the sound-pickup assembly  16  may be electrically connected to the assemblies mentioned above through the loudspeaker assemblies  11 . The assemblies mentioned above may be electrically connected to the remaining one or more assemblies of the bone conduction headset through the wiring group of the sound-pickup assembly  16 . The assemblies mentioned above may be connected to the loudspeaker assemblies  11 . Therefore, the wiring group of the sound-pickup assembly  16  may be electrically connected to the assemblies mentioned above through the loudspeaker assemblies  11 . 
     As shown in  FIG.  6   , in some embodiments, the loudspeaker assembly  11  may include a first loudspeaker housing  111 , a second loudspeaker housing  112 , and the loudspeaker  113 . The first loudspeaker housing  111  may be matched and connected to the second loudspeaker housing  112  to form a containment space  110  for accommodating the loudspeaker  113 . A first through-hole  1110  and a second through-hole  1111  may be arranged on the first loudspeaker housing at an interval, and the first through-hole  1110  and the second through-hole  1111  may be in communication with the containment space  110 . The wiring group of the sound-pickup assembly  16  may traverse the first through-hole  1110 , the containment space  110 , and the second through-hole  1111 . 
     In some embodiments, the sound-pickup assembly  16  may be relatively fixed opposite to the loudspeaker assembly  11 . That is, the sound-pickup assembly  16  may not move relative to the loudspeaker assembly  11  after the sound-pickup assembly  16  is matched and connected to the loudspeaker assembly  11 . In some embodiments, the sound-pickup assembly may be directly connected to the first loudspeaker housing, and the connection way may not be described herein. In some embodiments, the first loudspeaker housing  111  may be matched and connected to one end of the connection member  181  (e.g., the elastic member  1811 ). In some embodiments, the first loudspeaker housing  111  may be matched to and inserted into one end of the elastic connecting rod  18111 . 
     In some embodiments, when the sound-pickup assembly  16  is closer to a body part of the user that generates sound, for example, the vocal cord, the throat, the mouth, the nasal cavity, or the like, the microphones of the sound-pickup assembly  16  may receive a vibration signal with greater amplitude. The sound quality of the sound signal picked up by the microphones may be better, and the volume may be larger. For example, when the sound-pickup assembly  16  is aligned with the mouth of the user, the radio effect may be better. When the user does not need to use the microphone function, for example, when the user eats food, the position of the sound-pickup assembly  16  may be adjusted. Therefore, in some embodiments, the sound-pickup assembly  16  may be configured to be rotatable relative to the loudspeaker assembly  11  to facilitate an adjustment the position of the sound-pickup assembly  16  by the user, thereby improving the user experiences. 
     In some embodiments, in order to facilitate the adjustment of the pickup position of the sound-pickup assembly, the sound-pickup assembly may be configured to be rotatable relative to the first loudspeaker housing  111 . In some embodiments, the loudspeaker assembly  11  may include a rotation member  184 . The first loudspeaker housing  111  may be configured with the first through-hole  1110 . 
     In some embodiments, the rotation member  184  may be combined with the connection member  181  (e.g., the elastic member  1811 ) in one or more embodiments described above. For example, the sound-pickup assembly  16  may be connected to the rotation member  184  by the connection member  181 , and the rotation relative to the loudspeaker assembly  11  may be achieved through the connection between the rotation member  184  and the loudspeaker assembly  11 . In some embodiments, the connection member  181  may be the elastic member  1811 . For example, the elastic member  1811  may be the elastic connecting rod  18111 . The present disclosure may be illustrated combined with the rotation member  184  and the elastic connecting rod  18111 . 
     In some embodiments, the rotation member  184  may be inserted into the first through-hole  1110  rotatably, and a plug-in part  182  may be matched to and inserted into the rotation member  184  so that the sound-pickup assembly may be rotatable relative to the first loudspeaker housing  111 . 
     The second through-hole  1111  may be arranged on the first loudspeaker housing  111  spaced apart from the first through-hole  1110 . The second through-hole  1111  may be matched to and inserted into the remaining assemblies (e.g., the ear hook assembly  12 ) of the bone conduction headset so that the loudspeaker assembly  11  may be fixedly connected to the remaining assemblies of the bone conduction headset (e.g., the ear hook assembly  12 ). The first through-hole  1110  and the second through-hole  1111  may be in communication with the containment space  110 . 
     As shown in  FIG.  8   , in some embodiments, the rotation member  184  may include a wire-guiding part  1841  and a rotation part  1842  connecting with each other. The rotation part  1842  may be inserted in the first through-hole  1110 , and the sound-pickup assembly  16  may be connected with the wire-guiding part to cause the wiring group of the sound-pickup assembly  16  to pass through the wire-guiding part  1841  and traverse the first through-hole  1110  via the rotation part  1842 . 
     In some embodiments, an access segment (not shown in the figure) extending away from the first through-hole  1110  may be arranged on an end opening of the first through-hole  1110  of the first loudspeaker housing  111 . The access segment may be in communication with the first through-hole  1110 . The rotation part  1842  may be sleeved on a peripheral wall of the access segment to achieve a rotatable connection with the loudspeaker assembly  11 . More details regarding the wire-guiding part  1841  and the rotation part  1842  may be described elsewhere in the present disclosure, which is described here. 
     In some embodiments, the first loudspeaker housing  111  may include a bottom wall  1112  and a sidewall  1113  connecting with each other. The sidewall  1113  may surround and connect with the bottom wall  1112 , and the second loudspeaker housing  112  may be arranged covering one side of the sidewall  1113  deviate from the bottom wall  1112  to form the containment space  110  for accommodating the loudspeaker  113 . In some embodiments, the first through-hole  1110  may be formed on the bottom wall  1112 , and the second through-hole  1111  may be formed on the sidewall  1113 . In some embodiments, the first through-hole  1110  may be formed on one side of the bottom wall  1112  close to the second through-hole  1111  so that the first through-hole  1110  may be close to the second through-hole  1111 . 
     In some embodiments, when the sound-pickup assembly  16  is directly connected to the loudspeaker assembly  11  (e.g., the first loudspeaker housing  111 ) or the sound-pickup assembly  16  is connected to the loudspeaker assembly  11  via the connection assembly  18  (e.g., the elastic member  1811 ), if the connecting surface between the connection assembly  18  or the sound-pickup assembly  16  and the first loudspeaker housing  111  is a plane, the rotation of the sound-pickup assembly  16  may be interfered by the first loudspeaker housing  111 . Therefore, in some embodiments, the bottom wall  1112  may include a first convex part  1114  protruding in a direction away from the containment space  110 , and the first through-hole  1110  may be formed on the first convex part  1114 . The sidewall  1113  may include a second convex part  1115  protruding in a direction away from the containment space  110 . The second through-hole  1111  may be formed on the second convex part  1115 . 
     In some embodiments, a certain angle may be formed between a convex direction of the first convex part  1114  and a convex direction of the second convex part  1115 . That is, the angle between an axial direction of the first convex part  1114  and an axial direction of the second convex part  1115  may be a certain angle. In some embodiments, the convex direction of the first convex part  1114  may be perpendicular to the convex direction of the second convex part  1115 . In some embodiments, a connection between the first convex part  1114  and the second convex part  1115  may be an arched connection, that is, a connecting surface between the first convex part  1114  and the second convex part  1115  may be an arched surface. In some embodiments, the connecting surface between the first convex part  1114  and the second convex part  1115  may be a plane. 
     In the present embodiment, the structural strength and structural stability of the first loudspeaker housing  111  may be enhanced through the first convex part  1114  and the second convex part  1115  arranged on the bottom wall  1112  and the sidewall  1113 , respectively. The convex direction of the first convex part  1114  may be perpendicular to the convex direction of the second convex part  1115 , and the connection between the first convex part  1114  and the second convex part  1115  may be the arched connection. The rotation member  184  may be inserted into the first through-hole  1110  of the first convex part  1114 . The rotation of the stick assembly may not be interfered from the first loudspeaker housing  111  via the first convex part  1114  with a corresponding height. Possible mutual interferences between the ear hook assembly  12  and the stick assembly may be reduced in a case that the convex direction of the convex part  1114  and the convex direction of the second convex part  1115  are perpendicular to each other. 
     In the present embodiment, the sound-pickup assembly  16  may connect other related assemblies of the acoustic input and output apparatus  10  via the corresponding wiring group, for example, the battery assembly  14  or the control circuit assembly  15 . In addition to facilitating the controlling of the sound-pickup assembly described in the embodiments mentioned above, the acquired audio signal may be transmitted to the related assemblies for subsequent processing. 
     In some embodiments, a wiring group of the stick assembly (e.g., the structure formed by the connection member  181  and the sound-pickup assembly  16 ) may pass through the elastic cover layer  183  of the elastic connecting rod  18111  and may be led outside via the plug-in parts  182 . In some embodiments, the lead channel (not shown in the figure) may be arranged on the elastic cover layer  183 , and the wiring group of the sound-pickup assembly  16  may pass through the lead channel. The wiring group of the sound-pickup assembly  16  may be led outside by passing through the plug-in parts  182  and enter the inside of the first loudspeaker housing  111 . Specifically, the wiring group of the sound-pickup assembly  16  may traverse the first through-hole  1110  and reach the inside of the second through-hole  1111  via the containment space  110 . In some embodiments, the wiring group of the sound-pickup assembly  16  may be further led out from the second through-hole  1111 , enter other assemblies of the bone conduction headset (e.g., an accommodating space  120  of the ear hook assembly  12 ), and be connected to other assemblies of the bone conduction headset (e.g., the battery module  14  or the control circuit assembly  15 ) electrically. 
     In actual use, the stick assembly (i.e., the structure formed by the sound-pickup assembly  16  and the connection member  181 ) may be rotatable relative to the first loudspeaker housing  111 . In some embodiments, when the sound-pickup assembly  16  rotates, the wiring group of the sound-pickup assembly  16  may move, and the rotation of the sound-pickup assembly  16  may be restricted due to improper movement of the wiring group of the sound-pickup assembly  16 . For example, the wiring group that is wound or bent excessively may restrict the sound-pickup assembly  16  to continue to rotate. In some embodiments, since the wiring group of the sound-pickup assembly  16  entering the first through-hole  1110  may contact the loudspeaker assembly  11  directly or indirectly (i.e., contacting the first loudspeaker housing  111 ), the wiring group of the sound-pickup assembly may also transmit the mechanical vibrations generated by the loudspeaker assembly  11  to the sound-pickup assembly  16 , which in turn affecting the pickup effect of the sound-pickup assembly  16  and the stability of the electrical connection. Based on the reasons mentioned above, the present disclosure provides the loudspeaker assemblies  11  to solve the technical problems mentioned above. 
     In some embodiments, the loudspeaker assembly  11  may further include a wire-fixing assembly configured to fix the wiring group of the sound-pickup assembly  16  passing through the first through-hole  1110  and reaching the second through-hole  1111 , thereby restricting the movement of the wiring group caused by the rotation of the sound-pickup assembly  16  relatives to the first loudspeaker housing  111 , reducing the wear of the wiring group, and restricting the amplitude of the mechanical vibrations of the wiring group of the sound-pickup assembly  16  to improve the pickup effect of the sound-pickup assembly  16 . 
     In some embodiments, the wire-fixing assembly may include a press-holding member  115  configured to press the wiring group of the sound-pickup assembly  16  tightly, thereby reducing the vibration amplitude of the wiring group of the sound-pickup assembly  16  and restricting the movement of the wiring group. Specifically, the press-holding member may be arranged in the containment space  110 . That is, the press-holding member may press the wiring group of the sound-pickup assembly  16  tightly in the first loudspeaker housing  111 . 
     As shown in  FIG.  7   , in some embodiments, the press-holding member  115  may include a first press-holding member  1151  configured to press and hold the wiring group of the sound-pickup assembly  16 . Specifically, the first press-holding member  1151  may be arranged in the containment space  110  and cover the first through-hole  1110  for pressing and holding the wiring group of the sound-pickup assembly  16  passing through the first through-hole  1110  and reaching the second through-hole  1111 . In some embodiments, the first press-holding member  1151  may partially cover the first through-hole  1110 , for example, the first press-holding member  1151  may partially cover the first through-hole  1110 , and only a part of the gap may be left as the channel for the wiring group to pass through. In some embodiments, the first press-holding member  1151  may completely cover the first through-hole  1110 . For example, the first press-holding member  1151  may completely cover the first through-hole  1110 , and the wiring group may enter the containment space  110  through the gap of the connection between the first press-holding member  1151  and the first through-hole  1110 . In some embodiments, a through-hole (not shown in the figure) may be arranged on the first press-holding member  1151  for the wiring group of the sound-pickup assembly  16  to pass through, and the wiring group of the sound-pickup assembly  16  may enter the containment space  110  via the through-hole of the first press-holding member  1151 , which does not have to pass through the gap of the connection between the first press-holding member  1151  and the first through-hole  1110 , thereby the first press-holding member  1151  may contact the first through-hole  1110  tightly. 
     The press-holding member  115  may restrict the movable space of the wiring group of the sound-pickup assembly  16 , reduce the shaking or movement of the wiring group of the sound-pickup assembly  16 , and further reduce the vibrations generated by the vibration of the loudspeaker assembly  11  and the vibrations transmitted to the sound-pickup assembly  14 . The pickup effect of the sound-pickup assembly  16  and the stability of the electricity performance may also be improved. In addition, the pressing and holding of the press-holding member  115  may reduce the friction between the wiring group of the sound-pickup assembly  16  and the first loudspeaker housing  111 , thereby the wiring group of the sound-pickup assembly  16  may be protected. 
     In some embodiments, the press-holding member  115  may further include a second press-holding member  1152 . The second press-holding member  1152  may be combined with the first press-holding member  1151  in the embodiments mentioned above and press the wiring group tightly together. In some embodiments, the press-holding member may only include the second press-holding member  1152 , and the tightly pressing of the wiring group may also be realized by the second press-holding member  1152 . Specifically, the arrangement of the second press-holding member  1152  may be the same as or similar to the first press-holding member  1151 . For example, the second press-holding member  1152  may at least partially cover the first through-hole  1110 , or the through-hole may be arranged on the second press-holding member  1152  for the wiring group to pass through. 
     In some embodiments, the press-holding member may include the first press-holding member  1151  and the second press-holding member  1152  at the same time to improve the limiting effect of the wiring group of the sound-pickup assembly  16 . In some embodiments, both the first press-holding member  1151  and the second press-holding member  1152  may be sheet-shaped members. The first press-holding member  1151  and the second press-holding member  1152  may be in a stacked manner and the second press-holding member  1152  may be spaced away from the first through-hole  1110  relative to the first press-holding member  1151 . In the present embodiment, the first press-holding member  1151  may be configured as a structure contacting the wiring group of the sound-pickup assembly  16  directly and pressing the wiring group of the sound-pickup assembly  16  tightly. The second press-holding member  1152  may be configured as a structure fixing the first press-holding member  1151  and pressing the wiring group of the sound-pickup assembly  16  indirectly, thereby improving the limiting effect of the press-holding member for the wiring group of the sound-pickup assembly  16 . In some embodiments, the hardness of the second press-holding member  1152  may be greater than the hardness of the first press-holding member  1151 . Since the first press-holding member  1151  contacts the wiring group of the sound-pickup assembly  16  directly, the first press-holding member  1151  with smaller hardness may reduce the wear of the wiring group of the sound-pickup assembly  16 , and the second press-holding member  1152  with certain hardness may make the first press-holding member  1151  to be more stable, thereby reducing the movement and the vibration amplitude of the wiring group of the sound-pickup assembly  16 . In some embodiments, the press-holding member may include a plurality of the press-holding members or a combination of the plurality of the press-holding members at the same time. The combination of the press-holding members may include at least two different press-holding members. 
     In some embodiments, the press-holding member  115  may include a hardcover and an elastomer arranged in a stacked manner. The hardcover may be used as the first press-holding member  1151 , and the elastomer may be used as the second press-holding member  1152 . The hardcover may be spaced away from the first through-hole  1110  than the elastomer and the elastomer may be configured to contact the wiring group of the sound-pickup assembly  16 . The hardness of the hardcover may be greater than the hardness of the elastomer. The hardcover may contact the wiring group of the sound-pickup assembly  16  by pressing and holding the elastomer. Since the hardness of the hardcover is greater than the hardness of the elastomer, the hardcover with greater hardness may ensure the stiffness pressing and holding the wiring group of the sound-pickup assembly  16 , and the elastomer with smaller hardness may improve the absorption of movement and the vibrations of the wiring group of the sound-pickup assembly  16 , thereby reducing the vibrations of the wiring group of the sound-pickup assembly  16  to play a role of buffer and protection. 
     In some embodiments, the hardcover may be metal, ceramic, plastic, or the like. For example, the hardcover may be a steel sheet. In some embodiments, the elastomer may be plastic, silica gel, rubber sheet, fiber, or the like, for example, the elastomer may be a bubble foam. 
     In some embodiments, a wire-fixing assembly may fix the wiring group of the sound-pickup assembly by other means or structures except for the press-holding member  115  in one or more embodiments mentioned above. 
     In some embodiments, the wire-fixing assembly may include one or more clamps arranged in the containment space  110 , and the clamps may be used to fix the wiring group of the sound-pickup assembly  16 . Specifically, the one or more clamps may be fixedly arranged on an inner wall of the first loudspeaker housing  111 . The wiring group of the sound-pickup assembly  16  may be fixed by the clamps after the wiring group of the sound-pickup assembly  16  enters the containment space  110  via the first through-hole  1110 . In some embodiments, the one or more clamps may be arranged in a predetermined manner so that the wiring group of the sound-pickup assembly  16  may reach the second through-hole  1111  smoothly via the containment space  110 . Although the wiring group of the sound-pickup assembly  16  is fixed by the clamps, the rotation of the sound-pickup assembly  16  relative to the first loudspeaker housing  111  may not be affected. In the present embodiment, the wiring group of the sound-pickup assembly  16  may also be fixed by the clamps. The volumes of the clamps may be relatively small to reduce the occupied space, which may reduce the volume of the loudspeaker assembly. 
     In some embodiments, the press-holding member may be physically connected to the first loudspeaker housing  111 , for example, by a bonding connection, a pin connection, a welding connection, an integral molding, or the like. In order to ensure that the press-holding member  115  accurately presses the wiring group of the sound-pickup assembly  16 , and further improve the connection strength between the press-holding member  115  and the first loudspeaker housing  111  and the service life, in some embodiments, the loudspeaker assembly  11  may further include locating members  1117  arranged on the first loudspeaker housing  111  at an interval. The first press-holding member  1151  and/or the second press-holding member  1152  may be fixed to the first loudspeaker housing  111  via the locating members  1117 . 
     In some embodiments, the locating members  1117  may be convex cylinders  11171  arranged on the periphery of the first through-hole  1110  and extending into the containment space  110 . 
     Specifically, taking the embodiments shown in  FIG.  9    as examples, a plurality of convex cylinders  13171  may be arranged on the periphery of the first through-hole  1110  of the first loudspeaker housing  111  and extending into the containment space  110 , and the plurality of convex cylinders  11171  may be the locating members  1117  fixing the press-holding member  115 . The plurality of convex cylinders  11171  may be arranged on the periphery of the first through-hole  1110  at an interval. In some embodiments, the second press-holding member  1152  may be fixedly connected to the plurality of locating members  1117 , and the first press-holding member  1151  may be fixed among the plurality of locating members  1117 . Specifically, a hardcover  1151  may be fixed on the plurality of convex cylinders  11171 , and the elastomer  1152  may be arranged among the plurality of convex cylinders  11171  without connecting the plurality of convex cylinders  11171  directly. For example, the number or count of the convex cylinders  11171  may be three. The elastomer  1152  may be pressed and held between the first through-hole  1110  and the hardcover through the hardcover fixed by the plurality of convex cylinders  11171  arranged on the periphery of the first through-hole  1110 . The elastomer may press and hold the wiring group of the sound-pickup assembly  16 , and the plurality of convex cylinders  11171  may improve the stability of the hardcover  1151 , which in turn improving the stability of the elastomer  1152  contacting the wiring group. 
     It should be noted that the locating members  1117  may be other structures or forms fixing the press-holding member  115  except for the convex cylinders  11171  in the embodiments mentioned above. For example, the locating members  1117  may be arranged on a position-limiting board (not shown in the figure) in the first loudspeaker housing  111 , and the position-limiting board may restrict the press-holding member  115  (e.g., the hardcover and the elastomer) to move. The press-holding member  115  may be limited at a position contacting the first through-hole closely to make the press-holding member  115  press the wiring group of the sound-pickup assembly  16  tightly. 
     The wiring group of the sound-pickup assembly  16  may be fixed by the wire-fixing assembly. For example, the wiring group of the sound-pickup assembly  16  may be pressed and held via the press-holding member  115 , the vibrations of the wiring group of the sound-pickup assembly  16  generated by the vibrations of the loudspeaker assembly  11  may be reduced, the stability of the wiring group may be enhanced during the process of rotating of the sound-pickup assembly  16 , the wear of the wiring group of the sound-pickup assembly  16  may be reduced, and the service life of the wiring group may also be improved. 
     In some embodiments, the sound-pickup assembly  16  may also have a good stability during the process of rotating, that is, a matching structure of the rotation member  184  and the first through-hole  1110  may have a greater effect on the rotation stability of the sound-pickup assembly  16 . The following is an exemplary description of the structure of the rotation member  184 . 
     As shown in  FIG.  8   , in some embodiments, the rotation member  184  may include a wire-guiding part  1841  and a rotation part  1842  connecting with each other. The wire-guiding part  1841  may be configured to be connected to the sound-pickup assembly  16  (or the connection member  181 ). The rotation part  1842  may be inserted in the first through-hole  1110  and may be rotatable relative to the first loudspeaker housing  111 . The wiring group of the sound-pickup assembly  16  may enter the containment space  110  via the wire-guiding part  1841  and the rotation part  1842 . In some embodiments, the wire-guiding part  1841  may be configured with a first hole segment  18410 . The rotation part  1842  may be configured with a second hole segment  18420  along an axial direction. The first hole segment  18410  may communicate with the second hole segment  18420 . 
     In some embodiments, the connection member  181  (e.g., the elastic member  1811 ) may be matched and connected to the wire-guiding part  1841 , and the wiring group of the sound-pickup assembly  16  may enter the first through-hole  1110  via the connection member  181 , the wire-guiding part  1841  (the first hole segment  18410  of the wire-guiding part  1841 ), and the rotation part  1842  (the second hole segment  18420  of the rotation part  1842 ) sequentially. 
     In some embodiments, the connection assembly  18  may include a matching connection assembly configured to match and connect the connection member  181  (e.g., the elastic member  1811 ) to the wire-guiding part  1841 . For example, one end of the connection member  181  away from the sound-pickup assembly  16  and one end of the wire-guiding part  1841  away from the rotation part  1842  may be configured with a first matching connection member and a second matching connection member mutually matched. When the first matching connection member is matched and connected to the second matching connection member, the wire-guiding part  1841  may be relatively fixed to the connection member  181 . 
     In some embodiments, the first matching connection member may be the plug-in parts  182  in one or more embodiments mentioned above. The plug-in parts  182  (e.g., the plug-in parts  182  of the connection member  181 ) of the stick assembly (e.g., the structure formed by the connection member  181  and the sound-pickup assembly  16 ) may be inserted into the first hole segment  18410  of the wire-guiding part  1841 . When the connection member  181  is connected to the rotation member  184 , the wiring group of the sound-pickup assembly  16  may enter the containment space  110  via the first hole segment  18410  and the second hole segment  18420 . In some embodiments, the plug-in parts  182  may be configured with a plug-in hole segment (not shown in the figure). The plug-in hole segment may be sleeved on the periphery of the first hole segment  18410  of the wire-guiding part  1841 , and the wiring group of the sound-pickup assembly  16  may be inserted into the first hole segment  18410  via the plug-in hole segment. 
     In some embodiments, an angle between an extending direction of the first hole segment  18410  and an extending direction of the second hole segment  18420  may be less than 180°. In some embodiments, the angle between the extending direction of the first hole segment  18410  and the extending direction of the second hole segment  18420  may be less than 170°. In some embodiments, the angle between the extending direction of the first hole segment  18410  and the extending direction of the second hole segment  18420  may be less than 160°. In some embodiments, the angle between the extending direction of the first hole segment  18410  and the extending direction of the second hole segment  18420  may be less than 150°. 
     When the user wears the bone conduction headset, a facing direction of the sound-pickup assembly  16  may be adjusted by rotating the rotation member to obtain different levels of radio effects. In some embodiments, the user may need to accurately adjust the sound-pickup assembly  16  to a position, for example, the user&#39;s mouth. In some embodiments, when the user rotates the sound-pickup assembly  16  to a certain position, the sound-pickup assembly  16  may be kept in the position. For example, when the user no longer needs to use the microphone function, the user may rotate the sound-pickup assembly  16  and keep the sound-pickup assembly  16  on one side deviating from the mouth of the user. Therefore, it may also be necessary to design the rotation member so that the rotation part  1842  may not rotate relative to the first through-hole randomly. 
     In some embodiments, a damping groove  1843  may be arranged along a circumferential direction of the rotation part  1842 . The connection assembly  18  may further include a damping member  116  arranged in the damping groove  1843 . The damping member  116  may contact an inner wall of the first through-hole  1110  to provide a rotation damping for the rotation part  1842  via contact friction. In the present embodiment, when the rotation part  1842  is rotatable relative to the first loudspeaker housing  111 , the damping member  116  may contact the inner wall of the first through-hole  1110  to provide a rotation damping. During the process of adjusting the sound-pickup assembly  16  by the user, the user may feel the change of damping, and the adjustment accuracy of the sound-pickup assembly  16  may be improved. At the same time, when the user completes the adjustment, the existence of the rotation damping may keep the rotation part  1842  and the sound-pickup assembly  16  in a certain position without rotation casually, so as to further improve the user experiences. 
     As shown in  FIG.  8   , in some embodiments, the rotation part  1842  may include a rotation main body  18421 , and a first stopping part  18422  and a second stopping part  18423  protruding from two ends of the rotation main body  18421  may be arranged along a radial direction of the rotation main body  18421 , respectively. In some embodiments, the rotation main body  18421  may be inserted into the first through-hole  1110 . The first stopping part  18422  and the second stopping part  18423  may abut against two sides of the first loudspeaker housing  111 , respectively, to restrict a movement of the rotation part  1842  relative to the first loudspeaker housing  111  along an axial direction. 
     In some embodiments, the rotation main body  18421  may be configured with a cylindrical shape, and the second hole segment  18420  may be arranged along the axial direction of the rotation main body  18421 . In some embodiments, the first stopping part  18422  and the second stopping part  18423  may be arranged on the periphery of the rotation main body  18421 , which are arranged in an annular shape or open-loops. Specifically, the first stopping part  18422  may be away from the wire-guiding part  1841  than the second stopping part  18423 , and the second stopping part  18423  may be close to the wire-guiding part  1841  than the first stopping part  18422 . Specifically, the first stopping part  18422  and the second stopping part  18423  may abut against two sides of the first through-hole  1110  of the first loudspeaker housing  111 , respectively, that is, one side of the containment space  110  and the other side of the containment space  110 . The first stopping part  18422  and the second stopping part  18423  arranged at two ends of the rotation main body  18421  abutting against two sides of the first loudspeaker housing  111  may effectively restrict the movement of the rotation part  1842  along the axial direction, thereby restricting the rotation part  1842  to rotate in the first through-hole  1110  to enhance the rotational stability. 
     In some embodiments, the first stopping part  18422  and the second stopping part  18423  may be combined with the damping member (e.g., the damping member  116  and the damping groove  1843 ) in one or more embodiments mentioned above. As shown in  FIG.  8    and  FIG.  9   , in some embodiments, in order to further enhance the rotational stability of the sound-pickup assembly  16 , the rotation part  1842  may be configured with the damping groove  1843 . In some embodiments, the damping groove  1843  may be formed between the first stopping part  18422  and the second stopping part  18423  of the rotation main body  18421  along the circumferential direction. The loudspeaker assembly  11  may include the damping member  116 . For example, the damping member  116  may be a damping ring sleeved in the damping groove  1843 . The damping member  116  (e.g., the damping ring) may be arranged in the damping groove  1843  and in contact with the inner wall of the first through-hole  1110  to provide the rotation damping to the rotation part  1842  by contact friction. The inner wall of the first through-hole  1110 , that is the bottom wall, may surround a part of the first through-hole  1110 . The damping member  116  inserted into the damping groove  1843  that provides the damping to the rotation part  1842  rotating in the first through-hole  1110  may make the rotation of the rotation portion  1842  to be more stable, and enhance the rotation balance and stability of the stick assembly. At the same time, since a damping assembly is added, the rotation part  1842  rotating relative to the first through-hole  1110  may need to overcome the rotation damping, which may effectively prevent the rotation member from rotating randomly. On the other hand, when the user rotates the sound-pickup assembly  16  to the target position, the sound-pickup assembly  16  may not need to be fixed to fix the position of the sound-pickup assembly  16 , thereby further improving the user experiences. 
     The material of the damping member  116  is not limited in the present disclosure. In some embodiments, the damping member  116  may be a rubber member, a plastic member, a silicone element, or the like. In addition, the damping member  116  may also be other types of materials, such as alloy with high damping. 
     In some embodiments, in the process of rotating the sound-pickup assembly  16 , the reliability of the rotation may need to be enhanced except for the rotational stability. If the sound-pickup assembly  16  may be rotatable in the same direction without restrictions (i.e., the rotation range is more than 360 degrees), the wiring group, or the like, of the sound-pickup assembly  16  may be twisted or broken. If the sound-pickup assembly  16  is rotatable in the same direction without restrictions, the damping assembly (the damping groove  1843  and damping member  116 ) of the rotation member  184  may be more susceptible to fail, resulting in subsequent difficulties to adjust the angles of the sound-pickup assembly  16  by the rotation member  16 . Therefore, in some embodiments, it may be necessary to limit the rotation range of the sound-pickup assembly  16 . 
     In some embodiments, the connection assembly  18  may further include a rotation-limiting structure, and the rotation-limiting structure may be configured to restrict a rotation range of the rotation part  1842  relative to the first loudspeaker housing  111 , thereby improving the service life of the rotation member. 
     In some embodiments, the rotation-limiting structure may include a limiting groove  18441  arranged at an upper portion of the rotation part  1842  along a circumferential direction and a limiting member  1116  arranged on the inner wall of the first through-hole and matched to the limiting groove  18441 . When the rotation part  1842  rotates relative to the first loudspeaker housing  111 , the limiting member  1116  may abut against two ends of the limiting groove  18441 , to restrict the rotation part  1842  from rotating. 
     As shown in  FIG.  8    and  FIG.  9   , in some embodiments, the rotation part  1842  may be configured with the limiting groove  18441 . A convex block  11161  may be arranged protruding from the inner wall of the first through-hole  1110 , and the convex block  11161  may be matched with the limiting groove  18441  to restrict the rotation range of the rotation part  1842 . 
     In some embodiments, the rotation-limiting structure may be combined with the damping assembly (e.g., the damping member  116  and the damping groove  1843 ) and/or the first stopping part  18422 , and the second stopping part  18423  in one or more embodiments mentioned above. 
     In some embodiments, the limiting groove may form between the first stopping part  18422  and the second stopping part  18423  along the circumferential direction of the rotation main body  18421 . The limiting groove  18441  and the damping groove  1843  may be arranged at an interval. Specifically, the limiting groove  18441  and the damping groove  1843  may be arranged at an interval along the axial direction of the rotation main body  18421 . For example, in the embodiment shown in  FIG.  9   , the limiting groove  18441  may be closer to the first stopping part  18422 , and the damping groove  1843  may be closer to the second stopping part  18423 . In some embodiments, the limiting groove  18441  may be arranged as the open-loop. That is, an angle occupied by the limiting groove  18441  may be less than 360°. In some embodiments, the angle occupied by the limiting groove  18441  may be less than 300°. In some embodiments, the angle occupied by the limiting groove  18441  may be less than 270°. In some embodiments, the limiting groove  18441  may be coincident with the damping groove  1843 . For example, the limiting groove  18441  may provide rotation damping for the rotation member. 
     In some embodiments, the positions of the limiting groove  18441  and the convex block  11161  may not be limited in the present disclosure. For example, the limiting groove  18441  may be arranged on the inner wall of the first through-hole  1110 , and the convex block  11161  may be arranged on the rotation main body  18421 . 
     In some embodiments, the convex block  11161  may be arranged protruding from the inner wall of the first through-hole  1110  (also shown in  FIG.  9   ). The convex block  11161  may be inserted into the limiting groove  18441 . In the present embodiment, when the rotation part  1842  is rotatable relative to the first loudspeaker housing  111 , two ends of the limiting groove  18441  may change the position between the convex block  11161  with the rotation of the rotation part  1842 . When the limiting groove  18441  rotates to one end abutting against the convex block  11161 , and the convex block  11161  may restrict the rotation part  1842  from rotating along the current rotation direction. That is, the convex block  11161  may abut against the two ends of the limiting groove  18441  to restrict the rotation range of the rotation part  1842 . 
     The convex block  11161  arranged on the inner wall of the first through-hole  1110  and the limiting groove  18441  arranged on the rotation main body  18421  may restrict the rotation range of the rotation part  1842 , and the sound-pickup assembly  16  may be rotatable in a certain range without unrestricted rotation in one direction. Thus, the rotation reliability of the sound-pickup assembly  16  may be improved, the failure probability of the sound-pickup assembly  16  may be reduced, and the service life of the acoustic input and output apparatus  10  may be improved. 
     In some embodiments, the count of limiting groove  18441  and the convex block  11161  may be one. More details about the matching of the limiting groove  18441  and the convex block  11161  may be illustrated in one or more embodiments mentioned above, which is not illustrated here. In some embodiments, the count of limiting grooves  18441  and the convex blocks  11161  may be at least two. For example, the count of limiting grooves  18441  and the convex blocks  11161  may be two. The two limiting grooves  18441  may be arranged on a peripherical wall of the rotation part  1842  at an interval, and the two convex blocks  11161  may be arranged at the inner wall of the first through-hole  1110 . One convex block  11161  may correspond to one limiting groove  18441 . In some embodiments, the two limiting grooves  18441  may be located at the same plane of the inner wall of the rotation part  1842 , or at different planes. That is, the two limiting grooves  18441  may be in a staggered state. The position of the convex block  11161  may not be limited as long as the convex block  11161  is matched and connected to the limiting groove  18441 . 
     In some embodiments, the rotation-limiting structure may restrict the rotation range of the rotation member  184  in other ways except for the limiting groove  18441  and the convex block  11161  in one or more embodiments mentioned above. In some embodiments, the rotation-limiting structure may include a magnetic assembly (not shown in the figure), and the magnetic assembly may include a magnetic conductor arranged on the rotation part  1842  along a circumferential direction and a magnet arranged on the inner wall of the first through-hole  1110 . In some embodiments, the magnetic conductor may have a certain length and surround the peripherical wall of the rotating portion  1842 . The strong coupling between the magnets and magnetic conductor may prevent the magnets from being separated from the magnetic conductor. When the magnets move to two ends of the magnetic conductor, the strong coupling between the magnets and the magnetic conductor may prevent the magnets from moving, thereby restricting the rotation range of the rotation part  1842 . In some embodiments, the length of the magnetic conductor may be less than the peripherical wall of the rotation part  1842 . Further, the length of the magnetic conductor may be less than ⅚ of the circumference of the peripheral wall of the rotation part  1842 , and the rotation range corresponding to the rotation part  1842  may be 300 degrees. Further, the length of the magnetic conductor may be less than ¾ of the circumference of the peripherical wall of the rotation part  1842 , and the rotation range corresponding to the rotation part  1842  may be 270 degrees. 
     In some embodiments, the sound-pickup assembly  16  and the rotation member  184  may be relatively fixed. That is, the sound-pickup assembly  16  may not be disassembled from the rotation member, for example, through a bonding connection, a welding connection, or the like. However, in some practical application scenarios, the user may often need to disassemble the sound-pickup assembly for repair, replacement, or the like. If the connection between the sound-pickup assembly and the rotation member  184  is a fixed connection, it may be inconvenient to disassemble the sound-pickup assembly  16 . Therefore, in some embodiments, the sound-pickup assembly  16  may be configured to be detachably connected to the rotation member  184 . However, in some application scenarios, the position of the sound-pickup assembly  16  may change frequently, and the connection strength between the sound-pickup assembly  16  and the rotation member  184  may be reduced after a long period of time. Therefore, the sound-pickup assembly  16  may be separated from the rotation member  184 . 
     In some embodiments, the connection assembly  18  may further include a fixing assembly configured to restrict the movement of the sound-pickup assembly  16  relative to the rotation member  184 . In some embodiments, the fixing assembly may be a detachable assembly. In some embodiments, the fixing assembly may include a third matching connection member (not shown in the figure) arranged on the wire-guiding part  1841  and a fourth matching connection member arranged on the sound-pickup assembly  16  matched and connected to the third matching connection member (not shown in the figure). The matching between the third matching connection member and the fourth matching connection member may connect the sound-pickup assembly  16  to the rotation member  184 . In some embodiments, the third matching connection member may be a buckle arranged on the sound-pickup assembly  16 . The fourth matching connection part may be a buckle notch arranged in the first hole segment  18410  of the wire-guiding part  1841  and matched to the buckle. The buckle may be stuck in the buckle notch to fix the sound-pickup assembly  16  and the rotation member  184 . 
     It should be noted that the fixing assembly in the present disclosure may be combined with the connection member  181  (e.g., the elastic member  1811 ) in one or more embodiments mentioned above. For example, the connection assembly  18  may include the fixing assembly and the connection member  181  at the same time. The sound-pickup assembly  16  may be connected to the rotation member  184  via the connection member  181 , while the sound-pickup assembly  16  may be connected to the connection member  181  via the fixing assembly. 
     Combined  FIG.  8    with  FIG.  9   , in some embodiments, in order to reduce the occurrence of the connection member  181  inserted into the first hole segment  11410  (e.g., the elastic member  1811 ) to fall off or be pulled out, or the like, in some embodiments, the fixing assembly may include a fixing member  114 , and the fixing member  114  may be arranged on the rotation member  184  to fixedly connect the connection member  181  to the rotation member  184 . In some embodiments, the fixing member  114  may be a part of the loudspeaker assembly  11  configured to fix the connection member  181  inserted into the first hole segment  11410 , thereby restricting the movement of the stick assembly (e.g., the connection member  181  and the sound-pickup assembly  16 ). 
     In some embodiments, the fixing member  114  may further include a fixedly connection part arranged on one end of a fixing main body  1141 , and the first end of the connection member  181  may be configured with a fixedly adaptive connection part. The fixedly connection part may be matched and connected to the fixedly adaptive connection part. 
     In some embodiments, the fixedly adaptive connection part may be a fixing hole  180 . Specifically, the fixing hole  180  may be arranged on the first end of the connection member  181  inserted into the first hole segment  11410 . 
     In some embodiments, the fixedly connection part may be a plug-in pin  1142  matched and connected to the fixing hole  180 . Specifically, the fixing member  114  may include the fixing main body  1141  and the plug-in pin  1142  arranged on one end of the fixing main body  1141 . The fixing main body  1141  may be inserted into the second hole segment  18420 , and the plug-in pin  1142  may be inserted into the fixing hole  180  to restrict the movement of the connection member  181  and the sound-pickup assembly  16 . In some embodiments, the fixing main body  1141  may be configured with a wire-guiding hole  1140  along the length direction. When the fixing member  114  is matched and connected to the rotation member  184  and the rotation member  184  is matched and connected to the first through-hole  1110 , the wire-guiding hole  1140  may be in communication with the second hole segment  18420  and the containment space  110  of the loudspeaker assembly  11 , and the wiring group of the sound-pickup assembly  16  may enter the wire-guiding hole  1140  via the first hole segment  11410 , and enter the containment space  110  by passing through corresponding wire-guiding hole  1140  on the fixing main body  1141 . 
     In some embodiments, the plug-in pin  1142  may be configured with a wire-threading hole communicating with the wire-guiding hole  1140  along the axial direction (not shown in the figure). When the fixing hole  180  is matched and connected to the plug-in pin  1142 , the wiring group of the sound-pickup assembly  16  may enter the wire-threading hole via the fixing hole  180  and enter the wire-guiding hole  1140  via the wire-threading hole. 
     It should be noted that the specific structure of the fixedly connection part and the fixedly adaptive connection part may not be limited in the present disclosure. In some embodiments, the fixedly connection part may be the fixing hole  180  arranged on one end of the fixing main body  1141 , and the fixing hole  180  may communicate with the wire-guiding hole  1140 . The fixedly adaptive connection part may be the plug-in pin  1142  arranged on one end of the connection member  181  (e.g., the elastic member  1811 ), and the wiring group of the sound-pickup assembly  16  may enter the fixing hole  180  via the plug-in pin  1142 , and enter the wire-guiding hole  1140  via the fixing hole  180 . 
     In some embodiments, the plug-in pin  1142  may include the buckle. When the plug-in pin  1142  is matched and connected to the fixing hole  180 , the buckle may be stuck in the fixing hole  180  to prevent the plug-in pin  1142  from separating from the fixing hole  180 , thereby further improving the connection strength of the connection member  181 . 
     In some embodiments, the rotation part  1842  may need to have a certain rigidity to ensure that the rotation member  184  has sufficient connection strength when the rotation member  184  is connected to the first loudspeaker housing  111 . In some embodiments, when the rotation part  1842  is matched and connected to the first loudspeaker housing  111 , the first stopping part  18422  and the rotation main body  18421  may need to be inserted into the first through-hole  1110 . If the rigidity of the rotation part  1842  is too large, it may be inconvenient to insert the first stopping part  18422  and the rotation main body  18421  into the first through-hole  1110 . Therefore, it may be necessary that the rotation main body  18421  and the first stopping part  18422  have a certain elasticity. Based on the reasons mentioned above, the structure of the rotation part  1842  may need to be designed to have a certain elasticity to be inserted in the first through-hole  1110  while ensuring a certain rigidity. 
     In some embodiments, gaps  18424  may be formed at one end of the rotation part  1842  away from the wire-guiding part  1841 , and the gaps  18424  may communicate with the second hole segment  18420 . The fixing member  114  may further include convex tables  1143  arranged protruding from a periphery of the fixing main body  1141 . The convex tables  1143  may be inserted into the gaps  18424  to fill the gaps  18424 . The rotation main body  18421  may be accommodated in the second hole segment  18420  stably. 
     In some embodiments, a count of gaps  18424  may be at least two, and the gaps  18424  may divide one end of the rotation part  1842  away from the wire-guiding part  1841  into at least two sub-members  18425  spaced apart from each other along the circumferential direction of the rotation part  1842 . That is, the gaps  18424  may penetrate the peripheral side of the rotation main body  18421 , and in the circumferential direction of the rotation part  1842 , one end of the rotation part  1842  away from the wire-guiding part  1841  may be divided into a corresponding count of sub-members  18425 . 
     The end part of the rotation portion  1842  may be divided into at least two sub-members  18425  by the gaps  18424 , so that one end of the rotation part  1842  away from the wire-guiding part  1841  may have a certain elasticity. The difficulty of inserting the rotation part  1842  into the first through-hole  1110  may be reduced, and the assembly efficiency may be improved. At the same time, the convex tables  1143  may be inserted into the gaps  18424 , and the structural reliability and strength of the rotation part  1842  may be enhanced by taking advantage of the two complementary approaches. 
     In some embodiments, the count of gaps  18424  may be two and opposite to each other. The count of convex tables  1143  may be two, correspondingly, and opposite to each other. The two convex tables  1143  may be inserted into the two gaps  18424  so that the fixing member  114  may be supported between the two sub-members  18425 . Further, the two convex tables  1143  may be inserted into the two gaps  18424 . Therefore, one end of the fixing member  114  and one end of the rotation part  1842  away from the wire-guiding part  1841  may complement with each other to form a complete annular structure. 
     In some embodiments, the count of the gaps  18424  may not be limited in the present disclosure, and the count of the gaps  18424  may be one, three, four, or more. The count of the sub-members  18425  may be the same as the count of the gaps  18424 , so that the sub-members  18425  may completely fill the gaps  18424  to form a complete annular structure. 
     It should be noted that the description of the fixing assembly may be only for the convenience of description, and one or more embodiments of the present disclosure may not be limited in the scope of the description. It may be understood that for those skilled in the art, after understanding the principle of the fixing assembly, any combination without departing from the principle may be achieved, or one or more of the assemblies herein may be omitted. For example, the fixedly connection member and the fixedly adaptive connection member may be omitted. For example, the fixing assembly may be combined with the wire-fixing assembly in one or more embodiments mentioned above. As another example, the fixing assembly may be combined with the elastic member  1811  in one or more embodiments mentioned above. In some embodiments, the fixing member  114  may further include the fixedly connection part arranged on one end of the fixing main body  1141 , and a first end of the elastic member  1811  may be configured with the fixedly adaptive part. The fixedly connection part may be matched and connected to the fixedly adaptive part to restrict the movement of the elastic member  1811  relative to the rotation member  184 . As another example, the fixing assembly may be combined with the damping assembly (e.g., the damping member  116  and the damping groove  1843 ) in one or more embodiments mentioned above and the rotation-limiting structure (e.g., the limiting groove  18441  and the convex table  11161 ). Such modifications may all be in the scope of one or more embodiments of the present disclosure. 
     In some embodiments, when the acoustic input and output apparatus  10  is the bone conduction headset, an ear hook assembly  12  may be included and connected to the loudspeaker assembly  11  so that the loudspeaker assembly  11  may be in a stable contact with the ears of the user to prevent the loudspeaker assembly  11  from falling off from the ears of the user. 
     In some embodiments, the count of the ear hook assembly  12  may be at least one. For example, the bone conduction headset is a single-ear headset. The count of the loudspeaker assembly  11  of the single-ear headset may be one, and one loudspeaker assembly  11  may be connected to one ear hook assembly  12  and fixed to one of the ears of the user. In some embodiments, the count of the ear hook assemblies may be two. For example, the bone conduction headset may be a double-ear headset. When the user wears the bone conduction headset, two groups of the loudspeaker assemblies  11  may be connected to two groups of the ear hook assemblies  12  and fixed near the left and right ear of the user to realize double-ear wearing. 
     In some embodiments, the second through-hole  1111  of the first loudspeaker housing  111  may be configured for matching to and plugging in the ear hook assembly  12 , and the wiring group of the sound-pickup assembly  16  may pass through the ear hook assembly  12  and enter an accommodating space  120  via the second through-hole  1111 . The following is an exemplary description of the ear hook assembly  12  in the embodiment. 
     In some embodiments, the ear hook assembly  12  may include an ear hook connection assembly and an ear hook housing. The ear hook assembly  122  may be connected with the second through-hole  1111  and the ear hook housing. The interior of the ear hook housing may be configured with the accommodating space  120  for accommodating at least one of the battery assembly  14  and the control circuit assembly  15 . The wiring group of the sound-pickup assembly  16  may pass through the second through-hole  1111 , enter the accommodating space  120  via the ear hook assembly  122 , and be electrically connected with the battery assembly  14  and/or the control circuit assembly  15  in the accommodating space  120 . 
     As shown in  FIG.  10    and  FIG.  11   , in some embodiments, the ear hook housing may include a first ear hook housing  121  and a second ear hook housing  123  matching the first ear hook housing  121 . When the first ear hook housing  121  is matched and connected to the second ear hook housing  123 , the ear hook housing may be formed and the accommodating spaces  120  may be formed inside the ear hook housing. In the present embodiment, the accommodating space  120  of one of the ear hook assemblies  12  may be configured to accommodate the battery assembly  14 , such as the ear hook assembly  12  shown in  FIG.  10   . The accommodating space  120  of the other ear hook assembly  12  may be configured to accommodate the control circuit assembly  15 , such as the ear hook assembly  12  shown in  FIG.  11   . In some embodiments, the accommodating space  120  of the ear hook assembly  12  may accommodate the control circuit assembly  15  and the battery assembly  14  at the same time. 
     In some embodiments, the ear hook assembly  122  may include the ear hook assembly  122 . One end of the ear hook assembly  122  may be connected to the first ear hook housing  121 . The other end of the ear hook assembly  122  may be connected to the loudspeaker assembly  11 . For example, in the embodiment shown in  FIG.  10   , the other end of the ear hook connection assembly  122  may be inserted into the second through-hole  1111  of the first loudspeaker housing  111  to be matched to and plugged in the loudspeaker assembly  11 . 
     In some embodiments, the other end of the ear hook assembly  122  may be connected to the loudspeaker assembly  11  in other ways. For example, the ear hook connection assembly  122  may further include an ear hook matching connection member. The ear hook matching connection member may be connected to the second through-hole  1111  and the other end of the ear hook connection assembly  122 . The exemplary ear hook matching connection member may be a matching connection tube. The other end of the ear hook connection assembly  122  and the second through-hole  1111  may be connected to two ends of the matching connection tube, respectively, to realize the connection between the ear hook connection assembly  122  and the second through-hole  1111 . 
     As shown in  FIG.  10   , in some embodiments, the battery assembly  14  may include a battery housing and a battery chip arranged in the battery housing (not shown in the figure). The battery chip may be configured to store power. The first NFC module  102  mentioned in the headset communication system embodiments in one or more embodiments may be attached to the battery assembly  14 . For example, the first NFC module may be attached to the battery housing so that the volume of the acoustic input and output apparatus  10  may be reduced, and the electromagnetic interference or signal interference between the first NFC module  102  and the control circuit assembly  15  may also be reduced. 
     As shown in  FIG.  11   , in some embodiments, the control circuit assembly  15  may include a circuit board  151 , a power supply interface  152 , a button  153 , antenna  154 , or the like. As shown in  FIG.  2   , in some embodiments, the first Bluetooth module  101  may be integrated into the control circuit assembly  15 . The control circuit assembly  15  may also integrate other circuits and elements. For example, the first Bluetooth module  101  may be integrated on the circuit board  151 . For example, the sensor assembly  17  may also be integrated on the circuit board  151 . 
     As shown in  FIG.  11   , taking the sensor assembly  17  including an optical sensor as an example, in the present disclosure, the first ear hook housing  121  may form a window  1200  for transmitting optical signals of the optical sensor. The window  1200  may be arranged close to the ear hook connection assembly  122 , for example, as shown in  FIG.  11   , the window  1200  may be arranged near the connection between the first ear hook housing  121  and the ear hook connection assembly  122 , so that when the acoustic input and output apparatus  10  is worn, the window  1200  may attach and close to the position near the root of the user&#39;s ear. In some embodiments, the shape of the window  1200  may be circular, elliptical, rectangular, rectangular-like (e.g., four corners of a rectangle are rounded), polygon, or the like. In some embodiments, the shape of the window  1200  may be rectangular-like. For example, as shown in  FIG.  11   , in some embodiments, the window  1200  may be set up in a shape of a racetrack. In some embodiments, an extension line of a central axis of the ear hook connection assembly  122  and a long axis of the window  1200  may intersect with each other, such as the rough intersecting relationships shown in  FIG.  11   . The extension line of the central axis of the ear hook connection assembly  122  and the long axis of the window  1200  intersecting with each other may make the window  1200  attach and close to the position near the root of the user&#39;s ear effectively. Therefore, the sensitivity and the validity of detection of the sensor assembly  17  may be guaranteed. In some embodiments, the first ear hook housing  121  of the ear hook assembly  12  configured to accommodate the control circuit assembly  15  may form the window  1200  mentioned above. 
     In some embodiments, the first ear hook housing  121  may need to be matched and connected to the second ear hook housing  123  to form a complete ear hook housing. In some embodiments, the first ear hook housing  121  may be connected to the second ear hook housing  123  directly, for example, by a bonding connection, a welding connection, a riveting connection, or the like. In some embodiments, the first ear hook housing  121  may be connected to the second ear hook housing  123  via a mechanical structure, such as a snap structure, a pin structure, or the like. 
     In some application scenarios, the development trend of the acoustic input and output apparatus  10  may be lightness and miniaturization, while the ear hook assembly  12  configured to accommodate the battery assembly  14 , the control circuit assembly  15 , related wiring, or the like, may be the part with a larger volume of the acoustic input and output apparatus  10 . At the same time, the associated buckle position and the design of the buckle of the ear hook assembly  12  may affect the volume of the entire ear hook assembly  12 . In order to reduce the volume of the ear hook assembly  12 , in some embodiments, the ear hook assembly  12  may include a splicing assembly configured to restrict the movement of the first ear hook housing  121  and the second ear hook housing  123  in a splicing direction and a thickness direction. The splicing assembly disclosed in the embodiment may reduce the volume of the ear hook assembly  12  while ensuring the connection strength between the first ear hook housing  121  and the second ear hook housing  123 . The following is the housing structure and the splicing assembly of the ear hook assembly  12  disclosed in the embodiment. 
     In some embodiments, the splicing assembly may include a first splice member and a second splicing member matched to the first splicing member. The first splicing member and the second splicing member may be arranged on the first ear hook housing  121  and the second ear hook housing  123 , respectively. When the first splicing member is matched and connected to the second splicing member, the first ear hook housing  121  and the second ear hook housing  123  may be relatively fixed in the splicing direction and the thickness direction. In some embodiments, the first splicing member may include a first slot  1211  and a second slot  1212  arranged along a length direction of the first ear hook housing  121  with the same opening direction. The second splicing member may include a first block  1231  and a second block  1231  protruding along a length direction of the second ear hook housing with the same extending direction, so that the first block  1231  and the second block  1232  may be inserted into the first slot  1211  and the second slot  1212 , respectively, along the same direction. 
     Specifically, the first ear hook housing  121  may be configured with the first slot  1211  and the second slot  1212  arranged at an interval. The second ear hook housing  123  may be configured with the first block  1231  and the second block  1232  at an interval. The first slot  1211  may be matched and stuck connected to the first block  1231 , and the second slot  1212  may be matched and stuck connected to the second block  1232 . Therefore, the first ear hook housing  121  may be matched and stuck connected to the second ear hook housing. 
     For the convenience of the description of the splicing assembly and the splicing details between the first ear hook housing  121  and the second ear hook housing  123 , in some embodiments, an accommodating space  120  may have a length direction perpendicular to a thickness direction. In the present disclosure, if there is no particular indication, the length direction may refer to the length direction of the accommodating space  120  (as shown in  FIG.  13   ), the thickness direction may refer to the thickness direction of the accommodation space  120  (as shown in  FIG.  13   ), and the splicing direction may refer to the moving direction when the first ear hook housing  121  and the second ear hook housing  123  are spliced, as shown in  FIG.  14   . As shown in  FIG.  12    and  FIG.  13   , in some embodiments, the first ear hook housing  121  and the second ear hook housing  123  may be spliced along a splicing direction perpendicular to the length direction and the thickness direction to form the accommodating space  120 . For example, the first ear hook housing  121  may include a first sub-accommodating space  1210 , and the second ear hook housing  123  may include a second sub-accommodating space  1230 . After the first ear hook housing  121  and the second ear hook housing are spliced, the first sub-accommodating space  1210  and the second sub-accommodating space  1230  may be combined to form the accommodating space  120 . 
     In some embodiments, the first ear hook housing  121  may be configured with the first slot  1211  and the second slot  1212  arranged at an interval along the length direction with the same or similar opening directions. For example, the openings of the first slot  1211  and the second slot  1212  may face the same direction. The second ear hook housing  123  may be configured with the first block  1231  and the second block  1232  protruding along the length direction with the same or similar extending direction. For example, the first block  1231  and the second block  1232  may be spaced apart in the length direction, and the protruding direction of the first block  1231  and the second block  1232  may be the same, thereby facing the same direction. When the first ear hook housing  121  and the second ear hook housing  123  are spliced, the first block  1231  and the second block  1232  may be inserted into the first slot  1211  and the second slot  1212 , respectively, in the same direction. As shown in  FIG.  14   , the first block  1231  may be inserted into the first slot  1211 , and the second block  1232  may be inserted into the second slot  1212  to restrict the relative movement of the first ear hook housing  121  and the second ear hook housing  123  along the splicing direction and the thickness direction. 
     In some embodiments, a first splicing edge  1201  of the first ear hook housing  121  and a second splicing edge  1202  of the second ear hook housing  123  may be matched to each other to restrict the relative movement of the first ear hook housing  121  and the second ear hook housing  123  along the length direction. The first splicing edge  1201  of the first ear hook housing  121  may refer to an edge of the first ear hook housing  121  toward one side of the second ear hook housing  123  splicing with the second ear hook housing  123 , such as the first splicing edge  1201  shown in  FIG.  12   . The second splicing edge  1202  of the second ear hook housing  123  may refer to an edge of the second ear hook housing  123  toward one side of the first ear hook housing  121  splicing with the first ear hook housing  121 , such as the second splicing edge  1202  shown in  FIG.  13   . The first ear hook housing  121  and the second ear hook housing  123  matching to each other may refer to shapes of the first splicing edge  1201  of the first ear hook housing  121  and the second splicing edge  1202  of the second ear hook housing  123  may be matched to each other, which may fit together or complement each other, thereby forming a stable matching structure and restricting the relative movement along the length direction. In the embodiment, the first ear hook housing  121  and the second ear hook housing  123  being spliced may refer to the first splicing edge  1201  of the first ear hook housing  121  may be substantially in contact with and connected to the second splicing edge  1202  of the second ear hook housing  123 . 
     In some embodiments, the extending directions of the first block  1231  and the second block  1232  may be opposite. That is, the first block  1231  and the second block  1232  may protrude toward different directions, respectively. For example, the first block  1231  may extend to the left along the length direction, and the second block  1232  may extend to the right along the length direction. Correspondingly, the opening directions of the first slot  1211  and the second slot  1212  may also be opposite. However, when the extending directions of the first block  1231  and the second block  1232  are opposite, the first block  1231  and the second block  1232  may protrude in opposite directions, which inevitably causes the additional space occupied by the first block  1231  and the second block  1232  to increase. Specifically, in order to ensure that the first block  1231  and the second block  1232  are inserted into the first slot  1211  and the second slot  1212 , it may also be necessary to increase the distance in the length direction to cover the first block  1231  and the second block  1232 , That is, the size of the ear hook housing may be increased. In the embodiment, the first slot  1211  and the second slot  1212  with the same or similar opening directions, and the first block  1231  and the second block  1232  with the same or similar extending directions may cause the matching directions of the first block  1231  and the second block  1232 , and the first slot  1211  and the second slot  1212  to be the same. Further, since the extending directions of the first block  1231  and the second block  1232  are the same or similar, the additional volumes occupied by the first block  1231  and the second block  1232  may be reduced, and the volume occupied by the matching between the first block  1231  and the second block  1232 , and the first slot  1211  and the second slot  1212  may also be reduced, thereby effectively reducing the volume of the ear hook assembly  12 . In addition, since the first splicing edge  1201  of the first ear hook housing  121  is matched to the second splicing edge  1202  of the second ear hook housing  123 , there may be no need to arrange additional buckles, protrusions, or the like, thereby causing the ear hook assembly  12  to be more compact and reducing the volume of the ear hook assembly  12 . At the same time, the matching of the first block  1231  and the second block  1232 , and the first slot  1211  and the second slot  1212  may restrict the movement of the first ear hook housing  121  and the second ear hook housing  123  in the splicing direction and the thickness direction. The displacement along the length direction may be restricted through the matching between the first splicing edge  1201  and the second splicing edge  1202 , so that the splicing of the first ear hook housing  121  and the second ear hook housing  123  may be more stable, and the structure may be more reliable. 
     As shown in  FIG.  12   , in some embodiments, the first slot  1211  and the second slot  1212  may be arranged on two sides of the first ear hook housing  121  along the length direction, respectively. The opening direction of the first slot  1211  may face the accommodating space  120 , and the opening direction of the second slot  1212  may be deviate from the accommodating space  120 . That is, the opening direction of the first slot  1211  may face the first sub-accommodating space  1210 , and the opening direction of the second slot  1212  may deviate from the first sub-accommodating space  1210 . In some embodiments, the first slot  1211  may be arranged on one side of the first ear hook housing  121  near the ear hook connection assembly  122 , and the second slot  1212  may be arranged on one side of the first ear hook housing  121  away from the ear hook connection assembly  122 . 
     As shown in  FIG.  13   , in some embodiments, the first block  1231  and the second block  1232  may be arranged on two sides of the second ear hook housing  123  along the length direction, the extending direction of the first block  1231  may deviate from the accommodating space  120 , and the extending direction of the second block  1232  may face the accommodating space  120 . That is, the extending direction of the first block  1231  may deviate from the second sub-accommodating space  1230 , and the extending direction of the second block  1232  may face the second sub-accommodating space  1230 . Accordingly, the first block  1231  may be arranged on one side of the second ear hook housing  123  near the ear hook connection assembly  122 , and the second block  1232  may be arranged on one side of the second ear hook housing  123  away from the ear hook connection assembly  122 . Since the second block  1232  protrudes and extends to the inside of the accommodating space  120 , compared with protruding and extending to the outside of the accommodating space  120 , it may not be necessary to occupy an additional space, and corresponding space may be saved. The second slot  1212  may be arranged on the front of the extending direction of the second block  1232  when the second block is matched to the second slot  1212 . The second block  1232  matched and inserted into the second slot  1212  may reduce the volume of the ear hook assembly  12 . 
     It should be noted that the arranged positions of the slot  1211 , the second slot  1212 , the first block  1231 , and the second block  1232 , and the specific arranged form may not be specifically limited in the present disclosure. For example, the extending directions of the first block  1231  and the second block  1232  may extend to the right along the length direction, correspondingly, and buckle-directions of the first slot  1211  and the second slot  1212  may correspond to the directions mentioned above. Such deformations may be all within the scope of the present disclosure. 
     In some embodiments, when the first block  1231  and the second block  1232  are matched and connected to the first slot  1211  and the second slot  1212 , respectively, since the extending directions of the first block  1231  and the second block  1232  are the same or similar, for one of the ear hook housings (e.g., the second ear hook housing  123 ), only the movement along the extending directions of the first block  1231  and the second block  1232  may be restricted. For example, in the embodiments shown in  FIG.  14   , the first block  1231  and the second block  1232  may extend to the left along the length direction. When the first ear hook housing  121  is matched and connected to the second ear hook housing  123 , the second ear hook housing  123  may not move to the left along the length direction relative to the first ear hook housing  121 . However, the second ear hook housing  123  may move to the right along the length direction. Therefore, the relative movement of the first ear hook housing  121  and the second ear hook housing  123  may not be fully restricted based on the matching between the block and the slot. 
     In some embodiments, the first splicing member may further include a first blocking part  1213  arranged at the first splicing edge  1201  of the first ear hook housing  121 . The second splicing member may further include a second blocking part  1234  arranged at the second splicing edge  1202  of the second ear hook housing  123 . The first blocking part  1213  may be matched to the second blocking part  1234  to restrict the relative movement of the first ear hook housing  121  and the second ear hook housing  123  along the length direction. The first blocking part  1213  and the second blocking part  1234  matched to each other may refer to the shape of the first blocking part  1213  and the shape of the second blocking part  1234  matched to each other. The first blocking part  1213  and the second blocking part  1234  may be matched to or complement each other, thereby forming a stable matching structure to restrict the relative movement of the first ear hook housing  121  and the second ear hook housing  123  in the length direction. For example, the first blocking part  1213  may be an opening formed on the first splicing edge  1201  of the first ear hook housing  121 , and the second blocking part  1234  may be a convex part formed on the second splicing edge  1202  of the second ear hook housing  123 . The shape of the opening part and the shape of the convex part may be matched to each other, so that the first splicing edge  1201  of the first ear hook housing  121  and the second splicing edge  1202  of the second ear hook housing  123  may be complementary to restrict the relative movement in the length direction. In some embodiments, the opening part may be a notch, and the convex part may be a protrusion matched to the notch. The convex part may be matched to the notch to restrict the relative movement of the first ear hook housing  121  and the second ear hook housing  123  in the length direction. 
     It should be noted that the present disclosure may not specifically limit the specific structure and the position of the first blocking part  1213  and the second blocking part  1234 . For the convenience of description, one or more embodiments of the present disclosure may not be limited to the scope of the embodiments mention above. It may be appreciated that for those skilled in the art, after understanding the principles of the first blocking part  1213  and the second blocking part  1234 , improvements may be made be without departing from the principles. For example, the first blocking part  1213  may be the convex part formed on the first splicing edge  1201  of the first ear hook housing  121 , and the second blocking part  1234  may be the opening part formed on the second splicing edge  1202  of the second ear hook housing  123 . 
     In the one or more embodiments of the present disclosure, the opening direction of the first slot  1211  may face the accommodating space  120 . If the first slot  1211  is formed directly in the first sub-accommodation space  1210 , a pattern drawing direction forming the first sub-accommodation space  1210  and a pattern drawing direction forming the first slot  1211  may interfere with each other during the process of using corresponding molds to form the first sub-accommodation space  1210  and the first slot  1211 . Since the pattern drawing direction of the first slot  1211  is in the first sub-accommodating space  1210 , which may also conflict with the pattern drawing directions of other structures, it may bring great difficulties to the production. Therefore, the embodiment designs the following structure to reduce production and manufacturing difficulty. 
     As shown in  FIG.  15   , in some embodiments, the first ear hook housing  121  may be configured with an outer side hole segment  1215  and an inner side hole segment  1216  communicating with each other in a direction from the outside of the accommodating space  120  to the inside of the accommodating space  120 . That is, the opening direction of the outer side hole segment  1215  may be away from the accommodating space  120 , and the opening direction of the inner side hole segment  1216  may face the accommodating space  120 . The outer side hole segment  1215  may communicate with the inner side hole segment  1216 . In some embodiments, the opening shapes of the inner side hole segment  1216  and the outer side hole segment  1215  may include a rectangle, a triangle, a circular shape, or the like, which is not specifically defined in the present disclosure. 
     In some embodiments, the outer side hole segment  1215  may be filled with a filling member  1217 . The filling member  1217  may include, but may not be limited to, a plastic member, a metal member, a rubber member, or the like. For example, the filling member may be a hard glue. When the outer side hole segment  1215  is filled and blocked, the inner side hole segment  1216  may be configured as the first slot  1211 , and the opening direction of the inner side hole segment  1216  may face the accommodating space  120  to be matched to the first block  1231 . 
     During the actual manufacturing process, the outer side hole segment  1215  and the inner side hole segment  1216  may be formed in turn from the outside of the first ear hook housing  121  to the inside of the first ear hook housing  121 . Since the pattern drawing direction of the outer side hole segment  1215  and the inner side hole segment  1216  may not need to be performed in the first sub-accommodating space  1210  but performed outside of the first ear hook housing  121 , and the outer side hole segment  1215  may be filled with the filling member  1217  to allow the remaining inner side hole segment  1216  to be used as the first slot  1211 , the complexity and difficulty of manufacturing may be reduced effectively, and the cost may be saved. 
     In some embodiments, the cross-sectional area of the outer side hole segment  1215  perpendicular to the connection direction of the inner side hole segment  1215  and the inner side hole segment  1216  may be larger than the cross-sectional area of the inner side hole segment  1216  perpendicular to the connection direction of the outer side hole segment  1215  and the inner side hole segment  1216 . Since the cross-sectional area corresponding to the outer side hole segment  1215  is greater than the corresponding cross-sectional area of the inner side hole segment  1216 , it may be convenient to fill the filling member  1217  in the outer side hole segment  1215 , thereby having a better blocking effect and forming the first slot  1211  quickly. 
     An exemplary description of the manufacturing method of the ear hook assembly  12  of the present embodiment is as follows: 
     Step S 100 : the first ear hook housing  121  and the second ear hook housing  123  may be formed through an injection molding, and the outer side hole segment  1215  and the inner side hole segment  1216  communicating with each other may be formed in the first ear hook housing  121  from the outside of the first ear hook housing  121  to the inside of the first ear hook housing  121 ; the first block  1231  may be formed on the second ear hook housing  123 . 
     Step S 200 : the outer side hole segment  1215  may be filled with the filling member  1217  and the inner side hole segment  1216  may be used as the first slot  1211 . 
     Alternatively, the outer side hole segment  1215  may be filled with the filling member  1217  through injection molding. 
     In some embodiments, in order to protect the first ear hook housing  121 , the first ear hook housing  121  may be covered by the ear hook elastic cover layer  1223  after S 200 , details are as follows: 
     Step S 210 : the periphery of the first ear hook housing  121  may be covered by the ear hook elastic cover layer  1223  through injection molding, and the outer side hole segment  1215  may also be covered. 
     The ear hook elastic cover layer  1223  may refer to a part of the ear hook assembly  12  contacting the user. The surface of the ear hook assembly  12  configured with the ear hook elastic cover layer  1223  may improve the comfort when the user wears the bone conduction headset, and improve the user experiences. More details regarding the ear hook elastic cover layer  1223  may refer to the description of other embodiments of the present disclosure, which may not be described herein. 
     Step S 300 : the first slot  1211  may be matched to and plugged in the first block  1231  to splice the first ear hook housing  121  and the second ear hook housing  123 . 
     Other structures of the ear hook assembly  12  may be manufactured by the existing molding method based on the specific structure of the ear hook assembly  12  mentioned above, which may not be described herein. 
     In some embodiments, the accommodating space  120  of the ear hook assembly  12  may accommodate other components of the bone conduction headset, for example, the battery assembly  14 , the control circuit assembly  15 , or the like. In order to facilitate the user to control the bone conduction headset, a button structure associated with the components may also be arranged on the ear hook housing. For example, the ear hook housing may be configured with a power plug-in hole  1233  that is electrically connected to the battery assembly  14 , and the user may charge the battery assembly  14  via the power plug-in hole  1233 . As another example, a buttonhole  1235  arranged on the ear hook housing may be electrically connected to the control circuit assembly  15 , and a control button arranged in the buttonhole  1235  may be electrically connected to the control circuit assembly  15 , for example, a volume button, a pause/start button. The user may control the bone conduction headset via the control button. 
     In order to better reduce the volume of the ear hook assembly  12 , the positions of the components in the accommodating space  120  may be designed so that the accommodating space  120  may be effectively compressed, and the volume of the ear hook housing may be reduced. 
     In some embodiments, if the power plug-in hole  1233 , or the like, of the acoustic input and output apparatus  10  may be arranged on one side of the second ear hook housing  123  away from the bottom wall  1112  of the first ear hook housing  121 , the volume of the ear hook assembly  12  may be increased. In order to effectively reduce the volume of the ear hook assembly  12 , the position of the power plug-in hole  1233  may be adjusted in one or more embodiments of the present disclosure, details are as follows: 
     As shown in  FIG.  12    to  FIG.  14   , in some embodiments, the ear hook housing may include a housing panel contacting the user, a housing backplane deviate from the user, and a plurality of side panels connecting the housing panel and the housing back panel. The buttonhole  1235  and the power plug-in pole  1233  may be arranged on different housing side panels of the plurality of housing side panels, respectively. 
     In some embodiments, the ear hook housing may have different shapes, for example, the ear hook housing may be a spheroid, an elliptical sphere, a rectangular cuboid (e.g.,  8  corners of the rectangular square are rounded corners), a prismatic body, or the like. In some embodiments, when the first ear hook housing  121  and the second ear hook housing  123  are spliced, the shape as shown in  FIG.  14    may be formed. 
     In some embodiments, part of the housing (e.g., the housing side panel below the splicing direction in  FIG.  14   ) of the second ear hook housing  123  far from the ear hook connection assembly  122  may be configured with the power plug-in hole  1233 . The power plug-in hole  1233  may communicate with the accommodating space  120 , and the power plug-in hole  1233  may be configured to accommodate the power supply interface  152 . The battery module  14  may be charged via the power interface. In some embodiments, the second ear hook housing  123  may include a housing bottom part and a housing side part, and the housing side part may surround and connect the housing bottom part to form a second sub-accommodating space  1230 . The housing bottom part may refer to the housing side panels below the splicing direction in  FIG.  14   . The housing side part may be a part of the housing side panels (e.g., a part of the housing panels in the splicing direction) of the ear hook housing. A side edge of the housing side part away from the housing bottom part may be the second splicing edge  1202  spliced with the first ear hook housing  121 . 
     In some embodiments, the buttonhole  1235  and the power plug-in hole  1233  may be arranged on different housing side panels. The different housing side panels described herein may be understood as the housing side panels in different directions. For example, in the embodiment shown in  FIG.  14   , the buttonhole  1235  and the power plug-in hole  1233  may be arranged on the housing side panels (e.g., the housing bottom part) below the splicing direction and the housing side panels (e.g., the housing side part) with the length directions turning to the right, respectively. 
     In some embodiments, the power plug-in hole  1233  may be arranged on the housing side part, communicating with the second sub-accommodating space  1230 , that is, communicating with the accommodating space  120 . 
     As shown in  FIG.  14   , in some embodiments, the second block  1232  may be arranged close to the power plug-in hole  1233 . That is, the second block  1232  may be arranged protruding from the part of the housing of the second ear hook housing  123  away from the ear hook connection assembly  122 , and extend toward the inside of the accommodating space  120 . In the present embodiment, the second block  1232  may be closer to the accommodating space  120  compared with the power plug-in hole  1233 , that is, the second block  1232  may be closer to the ear hook connection assembly  122  compared with the power plug-in hole  1233 . 
     In some embodiments, the projections of the second block  1232  and the power plug-in hole  1233  on a first reference plane perpendicular to the length direction may overlap each other. In the present embodiment, overlapping each other may include partial overlap (e.g., the overlapping part is a part of the projection of the second block  1232 , that is, a part of the projection of the power plug-in hole  1233 ), and also may include overall overlap (e.g., the projection of the second block  123  completely falls into the projection of the power plug-in hole  1233 ). In the present embodiment, taking the plane perpendicular to the length direction as the first reference plane, the projection of the second block  1232  on the first reference plane may be located in the projection of the power plug-in plane  1233  on the first reference plane, that is, ranges of two projections may overall overlap each other. The positions of the second block  1232  and the power plug-in hole  1233  may make the structure of the second ear hook housing  123  to be compact, and the volume of the ear hook housing assembly  12  may be reduced without affecting the installation of the power supply interface  152 . 
     In some embodiments, the projections of the second block  1232  and the power plug-in hole  1233  on a second reference plane perpendicular to the splicing direction may overlap each other. Overlapping each other described herein may also include partial overlap and overall overlap. In the present embodiment, taking the plane perpendicular to the splicing direction as the second reference plane, the projection of the second block  1232  on the second reference plane may also be located in the projection of the power plug-in hole  1233  on the second reference plane, that is, ranges of two projections may also overlap. The arrangement of the structures of the second block  1232  and the power plug-in hole  1233  may be compact compare no matter in the splicing direction or the length direction. The space occupied by the power plug-in hole  1233  and the second block  1232  may be saved to improve the compact of the structure of the ear hook assembly  12 . 
     It should be noted that the present application may not specifically limit the positions of the power plug-in hole  1233  and the buttonhole  1235 . For example, in addition to the arrangement positions described in the embodiments mentioned above, the power plug-in hole  1233  may be arranged on the housing side panels of the ear hook housing above the splicing direction, and the buttonhole  1235  may be arranged on the housing side panels below the splicing direction. As another example, the power plug-in hole  1233  may be arranged on the housing side panels of the ear hook housing below the splicing direction, and the buttonhole  1235  may be arranged on the housing side panels on the left side of the length direction. 
     In some embodiments, in addition to the housing side panels, the buttonhole  1235  or the power plug-in hole  1233  may also be arranged on the housing back panel. For example, the buttonhole  1235  and the power plug-in hole  1233  may be arranged on the housing side panels and the housing back panel, respectively. Specifically, the buttonhole  1235  may be arranged on the housing side panels below the splicing direction, and the power plug-in hole  1233  may be arranged on the housing back panel. 
     The acoustic input and output apparatus  10  may be used in the producing and manufacturing field or the like, and there may be great requirements for the control experience of the acoustic input and output apparatus  10 . The power plug-in hole  1233  and the buttonhole  1235  arranged at different positions may improve the control experience of the acoustic input and output apparatus  10 , and the reasons may be as follows. 
     In some embodiments, the acoustic input and output apparatus  10  generally may have a volume button  153 , or the like. The buttonhole  1235  or the like, and the power plug-in hole  1233  corresponding to the button  153  may be generally arranged on the bottom part of the second ear hook housing  123 , that is, the second ear hook housing  123  may be away from a part of the housing of the first ear hook housing  121 . Since the area of the bottom part of the housing is relatively limited, the buttonhole  1235  and the power plug-in hole  1233  may be compact. The buttonhole  1235  and the power plug-in hole  1233  may occupy as little space as possible. In some application scenarios, a wearer may wear workmanship, gloves, or the like. The buttonhole  1235  may be smaller, and the arrangement may be too compact, which may cause the wearer&#39;s control experience to decline and may easily cause mishandling. The power plug-in hole  1233  may not be arranged on the bottom part of the housing in the embodiment, and the power plug-in hole  1233  may be arranged on the side part of the housing, so that the buttonhole  1235  may be designed larger, and the arrangement may be more loosely, which may be convenient for the user to operate and reduce the occurrence of the mishandling. 
     In some embodiments, if the second block  1232  is arranged close to the power plug-in hole  1233  on the second ear hook housing  123  and faces the top position of the first ear hook housing  121  (such as a table area connecting the second block  1232 , that is, the second block  1232  may be regarded as formed by extending upward from the table area to the splicing direction), the space of a plug-in hole  1218  (as shown in  FIG.  18   ) of the first ear hook housing  121  may be squeezed, which in turn may affect the ear hook assembly  12  being matched to and plugged in other assemblies (the rear hook  13 ) of the bone conduction headset. The second block  1232  may need to occupy an additional space so that the first ear hook housing  121  and the second ear hook housing  123  may occupy a large space in the splicing direction, which may not be compact enough. Therefore, in one or more embodiments of the present disclosure, the second block  1232  and the power plug-in hole  1233  may be arranged on the bottom part of the housing of the second ear hook housing  123 , and the structure between the second block  1232  and the power plug-in hole  1233  may be arranged based on the projection relationship mentioned above so that the structure of the second ear hook housing  123  may be more compact in the splicing direction. The second block  1232  may extend toward the inside of the accommodating space  120 , and the size of the ear hook housing  12  may be miniaturized without occupying additional spaces. 
     In order to reduce the failure rate of the acoustic input and output apparatus  10 , it may be not only necessary to ensure the stability of the structure, but also need to ensure the stability of the electrical connection. The wiring group (e.g., the wiring group of the sound-pickup assembly  16  and the wiring group of the loudspeaker assembly) may be routed among the sound-pickup assembly  16 , the loudspeaker assembly  11 , and the ear hook assembly  12 , the stability of the route may be related to the reliability of the bone conduction headset. In order to improve the reliability of the route, in some embodiments, the ear hook connection assembly  122  may include the ear hook connection member and a wire stuck part. The ear hook connection member may be configured with a lead channel configured to lead the wiring group from the loudspeaker assembly  11 . The wire stuck part may be configured to stuck and stop the wiring group in a radial direction of the wiring group, thereby improving the reliability of the bone conduction headset. 
     In some embodiments, a joint part  1222  may be arranged at one end of the ear hook connection member away from the ear hook housing. As shown in  FIG.  15    and  FIG.  16   , in some implementations, the wire stuck part may include a first wire stuck part  1224  and a second wire stuck part  1219 . The first wire stuck part  1224  may be arranged at the joint part  1222 , and the second wire stuck part  1219  may be arranged on the first ear hook housing  121 . The wiring group leading from the loudspeaker assembly  11  may enter the accommodating space  120  via the first wire stuck part  1224  and the second wire stuck part  1219  sequentially. The first wire stuck part  1224  and the second wire stuck part  1219  may be configured to stuck and stop the wiring group in the radial direction of the wiring group, so that the shaking of the wiring group in the radial direction may be reduced. 
     In some embodiments, the wiring group stuck and stopped by the first wire stuck part  1224  and the second wire stuck part  1219  may be an additional member such as an auxiliary titanium wire used during the preparation of the ear hook assembly  12 , or the like. Specifically, during the preparation of ear hook assembly  12 , the lead channel may be formed in the ear hook elastic cover layer  1223  using the auxiliary titanium wire. Therefore, the auxiliary titanium wire may be led to pass through the first wire stuck part  1224  and the second wire stuck part  1219  sequentially and enter the accommodating space  120 . After the preparation is completed, the auxiliary titanium wire may be drawn out to form a lead channel of the containment space  110  and the accommodation space  120 . The first wire stuck part  1224  and the second wire stuck part  1219  may keep the stability of the auxiliary titanium wire to reduce the shake of the auxiliary titanium wire, thereby enabling the formation of the lead channel to meet the quality requirements and improving the good product rate. 
     In some embodiments, the lead channel (not shown in the figure) and the ear hook elastic metal filament may be arranged in parallel in the ear hook elastic cover layer  1223 . 
     In some embodiments, the wiring group stuck and stopped by the first wire stuck part  1224  and the second wire stuck part  1219  may be a wiring group (e.g., wiring group of the sound-pickup assembly) used for electrical connection and led after forming the lead channel. That is, the wiring group led by the loudspeaker assembly  11  may enter the accommodating space  120  via the first wire stuck part  1224  and the second wire stuck part  1219  and be electrically connected to the components (e.g., the battery assembly  14  and the control circuit assembly  15 ) in the accommodating space  120 . It should be understood that the shake of the wiring group may need to be reduced before entering the lead channel and after entering the lead channel so that the lead efficiency may be improved. In addition, since the ear hook assembly  12  is used to hang on a human ear, thus the ear hook assembly  12  may generally be arc-shaped. The wiring group passing through the ear hook assembly  12  may tend to shake, move, or the like, thus the first wire stuck part  1224  and the second wire stuck part  1219  may reduce the shaking of the wiring group. 
     It should be noted that the wire stuck part may be combined with one or more embodiments mentioned above. For example, if the loudspeaker assembly  11  is also connected with the stick component (e.g., the connection member  181  and the sound-pickup assembly  16 ), the wiring group led by the loudspeaker assembly  11  may include the wiring group of the loudspeaker  113  and the wiring group of the sound-pickup assembly  16 . If the loudspeaker assembly  11  is not connected to the stick assembly, the wiring group led by the loudspeaker assembly  11  may include the wiring group of the loudspeaker  113 . 
     In the embodiment, the first wire stuck part  1224  and the second wire stuck part  1219  may be arranged at the joint part  1222 , respectively. On the one hand, the movement of the auxiliary titanium wire relative to the first ear hook housing  121  and the joint part  1222  may be stuck and stopped during the preparation process to improve the good product rate of the ear hook assembly  12 , on the other hand, the movement of the wiring group in the radial direction may also be stuck and stopped, thereby reducing the shake generated by the wiring group so that the leading efficiency of the wiring group may be more efficient. The structure of the wiring group in the actual product may be more stable, and the stability of the electrical connection may be guaranteed. 
     In some embodiments, the first wire stuck part  1224  may have two first sub-wire stuck parts  12241  arranged in the thickness direction. As shown in  FIG.  16   , the two first sub-wire stuck parts  12241  may be staggered from each other in the length direction of the wiring group. The two first sub-wire stuck parts  12241  may stuck and stop the wiring group in the thickness direction when the wiring group passes between the two first sub-wire stuck parts  12241 , which in turn may restrict the movement of the wiring group in the thickness direction. 
     In some embodiments, the extending lengths of the two first sub-wire stuck parts  12241  may be different in the length direction of the wiring group. For example, the extending length of the first wire stuck part  1224  close to the second wire stuck part  1219  in the length direction of the wiring group may be greater than the extending length of the first wire stuck part  1224  away from the second wire stuck part  1219  in the length direction of the wiring group. 
     The second wire stuck part  1219  may have two second sub-wire stuck parts  12191  arranged in the thickness direction, and the two second sub-wire stuck parts  12191  may be arranged opposite relatively. The two second sub-wire stuck parts  12191  may stuck and stop the wiring group in the thickness direction when the wiring group passes between the two second sub-wire stuck parts  12191 , which in turn may restrict the movement in the thickness direction. 
     It should be noted that the count of the first sub-wire stuck part  12241  and the count of the second sub-wire stuck part  12191  may not be limited in the present disclosure, for example, the count of the first sub-wire stuck part  12241  and the count of the second sub-wire stuck part  12191  may be one, three, four, or the like. 
     In some embodiments, the first wire stuck part  1224  may be formed recessed on the joint part  1222 , and the second wire stuck part  1219  may be formed recessed on the first ear hook housing  121  so that the wiring group may be seen in the first wire stuck part  1224  and the second wire stuck part  1219 , which may reduce the distance when the wiring group is led and passes through an invisible area to improve the leading efficiency. In some embodiments, the first wire stuck part  1224  and the second wire stuck part  1219  may be hollow structures, and the wiring group may pass through the inside of the first wire stuck part  1224  and the second wire stuck part  1219 . 
     In some embodiments, when the ear hook assembly  12  is connected to the loudspeaker assembly  11 , the joint part  1222  may need to match the second through-hole  1111 . More details regarding the connection between the joint part  1222  and the second through-hole  1111  may be found in the embodiments of the present disclosure. 
     In some embodiments, in order to facilitate the joint part  1222  to be inserted into the second through-hole  1111  of the first loudspeaker housing  111 , and enhance the connection stability between the joint part  1222  and the second through-hole  1111 , as shown in  FIG.  16   , an end part  12221  of the joint part  1222  may form two through-grooves  1225  crossing each other to divide the end part  12221  into four sub-end parts. The end part  12221  may be divided into four sub-end parts by the two through-grooves  1225  crossing each other so that the four sub-end parts may be squeezed and may be elastically recovered. When the joint part  1222  is inserted into the second through-hole  1111 , the four sub-end parts may be squeezed and close to each other, so that the sub-end parts may be smaller, and the joint part  1222  may be easy to be inserted into the second through-hole  1111 . It should be noted that the count of the sub-end parts may not be limited in the present disclosure, and the count of the sub-end parts may be two, three, five, or the like. 
     In some embodiments, a protrusion  1226  may be arranged protruding from the periphery of the sub-end parts. The joint part  1222  may be inserted into the loudspeaker assembly  11  and the protrusion  1226  may be stuck and stopped by the loudspeaker assembly  11  to restrict the movement of the joint part  1222  from moving away from the loudspeaker assembly  11 . Specifically, after the joint part  1222  is inserted into the second through-hole  1111 , the four sub-end parts may be elastically recovered, which may cause the protrusion  1226  on the periphery of the sub-end parts to be stuck and stopped by the loudspeaker assembly  11 . Specifically, the protrusion  1226  may be arranged in the accommodating space  110 , and the protrusion  1226  may be stuck and stopped at the edge of the connection between the second through-hole  1111  and the containment space  110 . The connection reliability of the ear hook assembly  12  and the loudspeaker assembly  11  may be improved. 
     In some embodiments, the ear hook connection assembly  122  may further include the ear hook elastic metal filament  1221 , and the joint part  1222  may be arranged at one end of the ear hook elastic metal filament  1221 . 
     In some embodiments, the material of the ear hook elastic metal filament  1221  may be spring steel, titanium, or the like, and the material of the ear hook elastic metal filament may be a nickel-titanium alloy. 
     In order to protect the ear hook elastic metal filament  1221 , the ear hook connection assembly  122  may also include the ear hook elastic cover layer  1223  (as shown in  FIG.  12   ) at least covering the periphery of the ear hook elastic metal filament  1221 . Certainly, the ear hook housing elastic metal filament  1221  may further cover the first ear hook housing  121 . The joint part  1222  may be configured to be matched and connected to the loudspeaker assembly  11 . The other end of the ear hook elastic metal filament  1221  may be connected to the first ear hook housing  121 . 
     It should be noted that the ear hook elastic cover layer  1223  and elastic cover layer in one or more embodiments mentioned above may be configured to refer to a part of the bone conduction headset contacting the user. Therefore, the arrangement form of the ear hook elastic cover layer  1223  may be similar to the elastic cover layer  183 . In some embodiments, the ear hook elastic cover layer  1223  and the elastic cover layer  183  may be made of the same material. For example, the material of the ear hook elastic cover layer may be silica gel, rubber, plastic, or the like. In some embodiments, the elastic modulus of the ear hook elastic cover layer  1223  may be 0.5 GPa to 2 GPa. In some embodiments, the elastic modulus of the elastic cover layer may be 0.8 GPa to 1.5 GPa. In some embodiments, the elastic modulus of the elastic cover layer may be 1.2 GPa to 1.4 GPa. 
     In some embodiments, the ear hook elastic cover layer  1223  may only cover the ear hook elastic metal filament  1221 . In some embodiments, the ear hook elastic cover layer  1223  may further cover the first ear hook housing  121  and the second ear hook housing  123 . In some embodiments, the ear hook elastic cover layer  1223  may cover the second wire stuck part  1219 . In some embodiments, it may be possible to make the power plug-in hole  1233 , the buttonhole  1235 , or the like, to be exposed for the user to operated (e.g., charging by the power plug-in hole  1233 ). In some embodiments, the ear hook elastic cover layer  1223  may also cover at least a part of the joint part  1222 , and may cover the first wire stuck part  1224 . 
     In some embodiments, the acoustic input and output apparatus  10  may further include a rear hook assembly  13  configured to connect the ear hook assembly  12  so that the acoustic input and output apparatus  10  may be in stable contact with the backside of the head of the user. For example, taking the bone conduction headset shown in  FIG.  3    as an example, when the user wears the bone conduction headset, the rear hook assembly may be located at the backside of the head of the user. The rear hook assembly may cause the two ear hook assemblies connected to the rear hook assembly to be in stable contact with the user&#39;s ears. 
     In some embodiments, the rear hook assembly  13  may include a rear hook connection member and inserting parts  133  arranged at two ends of the rear hook connection member, and the inserting parts  133  may be configured to facilitate a stable connection between the rear hook connection member  12  and the ear hook assembly  12 . 
     In some embodiments, as shown in  FIG.  17   , the rear hook connection member may include a rear hook elastic metal filament  131 , a rear hook elastic cover layer  132  covering the rear hook elastic metal filament  131 , and the inserting parts  133  arranged at the two ends of the rear hook elastic metal filament  131 . The rear hook elastic cover layer  132  may also cover at least a part of the inserting parts  133 . 
     The inserting parts  133  may be configured to be matched to and plugged in the ear hook assembly  12 . In some embodiments, one side of the first ear hook housing  121  away from the ear hook connection assembly  122  may be configured with the plug-in hole  1218  (as shown in  FIG.  18   ). The plug-in hole  1218  and the second slot  1212  may be arranged adjacently. The inserting parts  133  may be matched to and plugged in the plug-in hole  1218 . At least one of the inserting parts  133  may be configured with two groups of notches  1331  arranged at an interval in the length direction. That is, the two groups of notches  1331  may be arranged on at least one of the inserting parts  133  at an interval in the length direction of the inserting parts  133 , and each group of notches  1331  may include at least one notch  1331 . The rear hook elastic metal filament  131  may be inserted into the inserting parts  133  via one end of the inserting parts  133 . A group of notches  1331  may be close to the inserting parts  133 , and the other group of notches  1331  may be arranged at one end away from the inserting parts  133 . 
     In some embodiments, the two groups of notches  1331  may be sequentially arranged along the direction from one end of the inserting parts  133  to the other end of the inserting parts  133 . The notches  1331  near one end of the inserting parts  133  may be configured to perform mold positioning. The notches  1331  away from one end of the inserting parts  133  may be configured to be stuck and matched to the first ear hook housing  121 . 
     In some embodiments, the two groups of notches  1331  may be divided into a first group of notches  1331  and a second group of notches  1331 . The first group of notches  1331  may be arranged at one end away from the inserting parts  133  and configured to be stuck and matched to the ear hook assembly  12 . As shown in  FIG.  17    and  FIG.  18   , in some embodiments, stuck connection parts  12181  may be arranged protruding from the first ear hook housing  121 . For example, the stuck connection parts  12181  may be arranged protruding from the plug-in hole of the first ear hook housing  121 . The inserting parts  133  may be inserted into the plug-in hole  1218  and the stuck connection parts  12181  may be inserted into the first group of notches  1331 , thereby restricting the relative movement between the ear hook assembly  12  and the rear hook assembly  13 . 
     In some embodiments, the second group of notches  1331  may be arranged at one end close to the inserting parts  133  and configured for mold positioning. That is, the second group of notches  1331  may be combined with corresponding convex structures on the mold, thereby accurately fixing the inserting parts  133  to a certain position and performing other processes to enhance the good product rate. For example, the inserting parts  133  and the rear hook elastic metal filament  131  may be positioned by the second group of notches  1331 , and the rear hook elastic cover layer  132  may be formed by injection molding. 
     In some embodiments, the notches  1331  may be arranged to extend along a direction along edges at two sides of a central axis of the inserting part to the central axis. 
     In some embodiments, the count of notches in each group may be the same or different. As shown in  FIG.  17   , in some embodiments, each group of notches  1331  may include two notches  1331 , and two notches  1331  in each group may be arranged opposite to each other. In some embodiments, the count of notches  1331  ib the first group of notches  1331  may be one, and the count of the second group of notches  1331  may be two. 
     It should be noted that the headset may be for illustrative purposes merely, and the specific form of the acoustic input and output apparatus  10  in the present disclosure may be not limited to the headset, for example, the acoustic input and output apparatus  10  may be glasses, such as cycling glasses, music glasses, AR (AugmentReality) glasses, VR (VirtualReality) glasses. As another example, the acoustic input and output apparatus  10  may be a hearing aid. 
     The basic concepts have been described above, apparently, to those skilled in the art, the detailed disclosure is only taken as an example, and does not constitute a limitation to the present disclosure. Although not explicitly stated here, those skilled in the art may make various modifications, improvements, and amendments to the present disclosure. These alterations, improvements, and modifications are intended to be suggested by this disclosure and are within the spirit and scope of the exemplary embodiments of this disclosure. 
     Moreover, certain terminology has been used to describe embodiments of the present disclosure. For example, the terms “one embodiment,” “an embodiment,” and/or “some embodiments” mean that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the present disclosure. Therefore, it is emphasized and should be appreciated that two or more references to “an embodiment” or “one embodiment” or “an alternative embodiment” in various parts of this specification are not necessarily all referring to the same embodiment. In addition, some features, structures, or features in the present disclosure of one or more embodiments may be appropriately combined. 
     In addition, those skilled in the art may understand that various aspects of the present disclosure may be illustrated and described through several patentable categories or situations, including any new and useful processes, machines, products, or combinations of materials or any new and useful improvements to them. Accordingly, all aspects of the present disclosure may be performed entirely by hardware, may be performed entirely by softwares (including firmware, resident softwares, microcode, etc.), or may be performed by a combination of hardware and softwares. The above hardware or softwares can be referred to as “data block”, “module”, “engine”, “unit”, “component” or “system”. In addition, aspects of the present disclosure may appear as a computer product located in one or more computer-readable media, the product including computer-readable program code. 
     Furthermore, the recited order of processing elements or sequences, or the use of numbers, letters, or other designations therefore, is not intended to limit the claimed processes and methods to any order except as may be specified in the claims. Although the above disclosure discusses through various examples what is currently considered to be a variety of useful embodiments of the disclosure, it is to be understood that such detail is solely for that purpose and that the appended claims are not limited to the disclosed embodiments, but, on the contrary, are intended to cover modifications and equivalent arrangements that are within the spirit and scope of the disclosed embodiments. For example, although the implementation of various components described above may be embodied in a hardware device, it may also be implemented as a software-only solution, e.g., an installation on an existing server or mobile device. 
     Similarly, it should be appreciated that in the foregoing description of embodiments of the present disclosure, various features are sometimes grouped together in a single embodiment, figure, or description thereof for the purpose of streamlining the disclosure aiding in the understanding of one or more of the various embodiments. However, this disclosure does not mean that the present disclosure object requires more features than the features mentioned in the claims. Rather, claimed subject matter may lie in less than all features of a single foregoing disclosed embodiment. 
     In some embodiments, a number illustrating elements and the count of attributes may be used. It should be understood that such numbers describing the embodiments, in some examples, may use “about”, “approximately”, “generally”, or the like, to modify. Unless otherwise stated, “about”, “approximately”, or “generally” may indicate that the number is allowed to vary by ±20%. Accordingly, in some embodiments, the numerical parameters set forth in the description and attached claims are approximations that may vary depending upon the desired properties sought to be obtained by a particular embodiment. In some embodiments, numerical data should take into account the specified significant digits and use an algorithm reserved for general digits. Notwithstanding that the numerical ranges and parameters configured to illustrate the broad scope of some embodiments of the present disclosure are approximations, the numerical values in specific examples may be as accurate as possible within a practical scope. 
     At last, it should be understood that the embodiments described in the present disclosure are merely illustrative of the principles of the embodiments of the present disclosure. Other modifications that may be employed may be within the scope of the present disclosure. Thus, by way of example, but not of limitation, alternative configurations of the embodiments of the present disclosure may be utilized in accordance with the teachings herein. Accordingly, embodiments of the present disclosure are not limited to that precisely as shown and described.