Patent Publication Number: US-2022222036-A1

Title: Audio device for processing audio data and operation method thereof

Description:
CROSS-REFERENCE TO RELATED APPLICATION 
     This application is a continuation of International Application No. PCT/KR2022/000164 filed on Jan. 5, 2022 which is based on and claims priority under 35 U.S.C. § 119 to Korean Patent Application No. 10-2021-0004888, filed on Jan. 13, 2021, in the Korean Intellectual Property Office, the disclosure of which is incorporated by reference herein in its entirety. 
    
    
     TECHNICAL FIELD 
     Certain embodiments of the disclosure relate to a device and a method for processing audio data in an audio device. 
     BACKGROUND 
     With the development of information communication technology and semiconductor technology, various electronic devices have developed as multimedia devices capable of providing a variety of multimedia functions. The multimedia functions may include at least one of a voice call function, a video call function, a message function, a broadcasting function, a wireless Internet function, a camera function, an electronic payment function, or a content reproducing function. 
     An electronic device can enhance the useability of these multimedia functions by interoperating with at least one other electronic device. For example, the electronic device may output audio data (e.g., a voice and/or music) to at least one external audio device. 
     When multiple audio devices (e.g., earphone devices) are utilized together, each audio device may be set to operate within a particular predefined role. For example, while establishing communication between the audio devices, the audio devices may determine a role of each audio device, such as a main device (e.g., a primary device, primary equipment, or a primary earbud) having an authority to control communication for the audio devices, and an auxiliary device (e.g., a secondary device, secondary equipment, or a secondary earbud) which operates according to control instructions from the main device. 
     The multiple audio devices may output audio data received from an external device (e.g., an electronic device) through each speaker. For example, when the audio devices includes earphones, and present executed functions include a call function and a music playback function, audio data (e.g., a voice and/or music) received from the external device (e.g., the electronic device) may be output through each speaker. 
     The multiple audio devices may collect audio data for transmission to the external audio device (e.g., the electronic device) using a first audio device configured as a primary device. For example, when a user wears earbuds for performing calls, voice recording, or voice commands, audio data collected through a microphone of the first audio device, preconfigured as a primary device, may be transmitted to the external device (e.g., the electronic device). 
     When noise is concentrated in a first direction in which the first audio device is worn, the multiple audio devices may experience deterioration in the audio data quality, as the noise picked up through the microphone of the first audio device. 
     SUMMARY 
     Certain embodiments of the disclosure may disclose a device and a method for processing audio data in an audio device. 
     According to certain embodiments, an audio device may include at least one microphone, a communication circuit, and at least one processor operatively connected to the at least one microphone and the communication circuit. The processor is configured to: establish a communication link with an electronic device via the communication circuit, transmit information related to the communication link to an external audio device via the communication circuit, detect a first level of noise included in a first audio data collected via the at least one microphone, identify a second level of noise of the external audio device, when the first level of noise satisfies a predesignated first condition, and controlling the external audio device to transmit second audio data collected by the external audio device to the electronic device, when the second level of noise of the external audio device meets a predesignated second condition different from the predesignated first condition. 
     According to certain embodiments, an operation method of an audio device may include establishing, via a communication circuit of the audio device, a communication link with an electronic device, transmitting, via the communication circuit, information related to the communication link to an external audio device, detecting, via at least one processor, a first level of noise included in a first audio data collected via at least one microphone of the audio device, identifying a second level of noise of the external audio device, when the first level of noise meets a predesignated first condition, and controlling the external audio device to transmit second audio data collected by the external audio device to the electronic device when the second level of noise of the external audio device meets a predesignated second condition different from the predesignated first condition. 
     Advantageous Effects of Invention 
     According to certain embodiments of the disclosure, when an audio device is linked with an external audio device and provides audio data collected through a microphone to an electronic device, the audio device may switch roles when detecting introduction of noise to the audio device and the external audio device. Thus, the overall quality of recorded audio data can be enhanced. 
    
    
     
       BRIEF DESCRIPTION OF DRAWINGS 
         FIG. 1  is a block diagram of an electronic device in a network environment according to certain embodiments; 
         FIG. 2  illustrates an example of a wireless communication system for providing a network of an audio device and an electronic device according to certain embodiments; 
         FIG. 3  is a block diagram of an audio device for processing audio data according to certain embodiments; 
         FIG. 4  is a block diagram of an electronic device for processing audio data according to certain embodiments; 
         FIG. 5  is a flow chart illustrating switching of a role of an audio device in an audio device according to certain embodiments; 
         FIG. 6  illustrates an example of the intensity of noise measured in audio devices according to certain embodiments; 
         FIG. 7  is a flow chart illustrating determining, by an audio device, of whether to perform role switching, based on noise introduced into the audio device according to certain embodiments; 
         FIG. 8  is a flow chart illustrating determining, by an audio device, of whether to perform role switching, based on noise of another audio device according to certain embodiments; 
         FIG. 9A  illustrates an example of identifying noise of another audio device by an audio device according to certain embodiments; 
         FIG. 9B  illustrates another example of identifying noise of another audio device by an audio device according to certain embodiments; 
         FIG. 10  is a flow chart illustrating transmission of a noise level request signal by an audio device according to certain embodiments; 
         FIG. 11  is a flow chart illustrating identification of noise of another audio device by an audio device according to certain embodiments; and 
         FIG. 12  is a flow chart illustrating role switching in an audio device according to certain embodiments. 
     
    
    
     DETAILED DESCRIPTION 
     Hereinafter, various example embodiments will be described in greater detail with reference to the figures. 
       FIG. 1  is a block diagram illustrating an example electronic device  101  in a network environment  100  according to certain embodiments. Referring to  FIG. 1 , the electronic device  101  in the network environment  100  may communicate with an electronic device  102  via a first network  198  (e.g., a short-range wireless communication network), or at least one of an electronic device  104  or a server  108  via a second network  199  (e.g., a long-range wireless communication network). According to an embodiment, the electronic device  101  may communicate with the electronic device  104  via the server  108 . According to an embodiment, the electronic device  101  may include a processor  120 , memory  130 , an input module  150 , a sound output module  155 , a display module  160 , an audio module  170 , a sensor module  176 , an interface  177 , a connecting terminal  178 , a haptic module  179 , a camera module  180 , a power management module  188 , a battery  189 , a communication module  190 , a subscriber identification module (SIM)  196 , or an antenna module  197 . In certain embodiments, at least one of the components (e.g., the connecting terminal  178 ) may be omitted from the electronic device  101 , or one or more other components may be added in the electronic device  101 . In certain embodiments, some of the components (e.g., the sensor module  176 , the camera module  180 , or the antenna module  197 ) may be implemented as a single component (e.g., the display module  160 ). 
     The processor  120  may execute, for example, software (e.g., a program  140 ) to control at least one other component (e.g., a hardware or software component) of the electronic device  101  coupled with the processor  120 , and may perform various data processing or computation. According to an embodiment, as at least part of the data processing or computation, the processor  120  may store a command or data received from another component (e.g., the sensor module  176  or the communication module  190 ) in volatile memory  132 , process the command or the data stored in the volatile memory  132 , and store resulting data in non-volatile memory  134 . According to an embodiment, the processor  120  may include a main processor  121  (e.g., a central processing unit (CPU) or an application processor (AP)), or an auxiliary processor  123  (e.g., a graphics processing unit (GPU), a neural processing unit (NPU), an image signal processor (ISP), a sensor hub processor, or a communication processor (CP)) that is operable independently from, or in conjunction with, the main processor  121 . For example, when the electronic device  101  includes the main processor  121  and the auxiliary processor  123 , the auxiliary processor  123  may be adapted to consume less power than the main processor  121 , or to be specific to a specified function. The auxiliary processor  123  may be implemented as separate from, or as part of the main processor  121 . 
     The auxiliary processor  123  may control at least some of functions or states related to at least one component (e.g., the display module  160 , the sensor module  176 , or the communication module  190 ) among the components of the electronic device  101 , instead of the main processor  121  while the main processor  121  is in an inactive (e.g., sleep) state, or together with the main processor  121  while the main processor  121  is in an active state (e.g., executing an application). According to an embodiment, the auxiliary processor  123  (e.g., an image signal processor or a communication processor) may be implemented as part of another component (e.g., the camera module  180  or the communication module  190 ) functionally related to the auxiliary processor  123 . According to an embodiment, the auxiliary processor  123  (e.g., the neural processing unit) may include a hardware structure specified for artificial intelligence model processing. An artificial intelligence model may be generated by machine learning. Such learning may be performed, e.g., by the electronic device  101  where the artificial intelligence is performed or via a separate server (e.g., the server  108 ). Learning algorithms may include, but are not limited to, e.g., supervised learning, unsupervised learning, semi-supervised learning, or reinforcement learning. The artificial intelligence model may include a plurality of artificial neural network layers. The artificial neural network may be a deep neural network (DNN), a convolutional neural network (CNN), a recurrent neural network (RNN), a restricted Boltzmann machine (RBM), a deep belief network (DBN), a bidirectional recurrent deep neural network (BRDNN), deep Q-network or a combination of two or more thereof but is not limited thereto. The artificial intelligence model may, additionally or alternatively, include a software structure other than the hardware structure. 
     The memory  130  may store various data used by at least one component (e.g., the processor  120  or the sensor module  176 ) of the electronic device  101 . The various data may include, for example, software (e.g., the program  140 ) and input data or output data for a command related thereto. The memory  130  may include the volatile memory  132  or the non-volatile memory  134 . 
     The program  140  may be stored in the memory  130  as software, and may include, for example, an operating system (OS)  142 , middleware  144 , or an application  146 . 
     The input module  150  may receive a command or data to be used by another component (e.g., the processor  120 ) of the electronic device  101 , from the outside (e.g., a user) of the electronic device  101 . The input module  150  may include, for example, a microphone, a mouse, a keyboard, a key (e.g., a button), or a digital pen (e.g., a stylus pen). 
     The sound output module  155  may output sound signals to the outside of the electronic device  101 . The sound output module  155  may include, for example, a speaker or a receiver. The speaker may be used for general purposes, such as playing multimedia or playing record. The receiver may be used for receiving incoming calls. According to an embodiment, the receiver may be implemented as separate from, or as part of the speaker. 
     The display module  160  may visually provide information to the outside (e.g., a user) of the electronic device  101 . The display module  160  may include, for example, a display, a hologram device, or a projector and control circuitry to control a corresponding one of the display, hologram device, and projector. According to an embodiment, the display module  160  may include a touch sensor adapted to detect a touch, or a pressure sensor adapted to measure the intensity of force incurred by the touch. 
     The audio module  170  may convert a sound into an electrical signal and vice versa. According to an embodiment, the audio module  170  may obtain the sound via the input module  150 , or output the sound via the sound output module  155  or a headphone of an external electronic device (e.g., an electronic device  102 ) directly (e.g., wiredly) or wirelessly coupled with the electronic device  101 . 
     The sensor module  176  may detect an operational state (e.g., power or temperature) of the electronic device  101  or an environmental state (e.g., a state of a user) external to the electronic device  101 , and then generate an electrical signal or data value corresponding to the detected state. According to an embodiment, the sensor module  176  may include, for example, a gesture sensor, a gyro sensor, an atmospheric pressure sensor, a magnetic sensor, an acceleration sensor, a grip sensor, a proximity sensor, a color sensor, an infrared (IR) sensor, a biometric sensor, a temperature sensor, a humidity sensor, or an illuminance sensor. 
     The interface  177  may support one or more specified protocols to be used for the electronic device  101  to be coupled with the external electronic device (e.g., the electronic device  102 ) directly (e.g., wiredly) or wirelessly. According to an embodiment, the interface  177  may include, for example, a high definition multimedia interface (HDMI), a universal serial bus (USB) interface, a secure digital (SD) card interface, or an audio interface. 
     A connecting terminal  178  may include a connector via which the electronic device  101  may be physically connected with the external electronic device (e.g., the electronic device  102 ). According to an embodiment, the connecting terminal  178  may include, for example, a HDMI connector, a USB connector, a SD card connector, or an audio connector (e.g., a headphone connector). 
     The haptic module  179  may convert an electrical signal into a mechanical stimulus (e.g., a vibration or a movement) or electrical stimulus which may be recognized by a user via his tactile sensation or kinesthetic sensation. According to an embodiment, the haptic module  179  may include, for example, a motor, a piezoelectric element, or an electric stimulator. 
     The camera module  180  may capture a still image or moving images. According to an embodiment, the camera module  180  may include one or more lenses, image sensors, image signal processors, or flashes. 
     The power management module  188  may manage power supplied to the electronic device  101 . According to an embodiment, the power management module  188  may be implemented as at least part of, for example, a power management integrated circuit (PMIC). 
     The battery  189  may supply power to at least one component of the electronic device  101 . According to an embodiment, the battery  189  may include, for example, a primary cell which is not rechargeable, a secondary cell which is rechargeable, or a fuel cell. 
     The communication module  190  may support establishing a direct (e.g., wired) communication channel or a wireless communication channel between the electronic device  101  and the external electronic device (e.g., the electronic device  102 , the electronic device  104 , or the server  108 ) and performing communication via the established communication channel. The communication module  190  may include one or more communication processors that are operable independently from the processor  120  (e.g., the application processor (AP)) and supports a direct (e.g., wired) communication or a wireless communication. According to an embodiment, the communication module  190  may include a wireless communication module  192  (e.g., a cellular communication module, a short-range wireless communication module, or a global navigation satellite system (GNSS) communication module) or a wired communication module  194  (e.g., a local area network (LAN) communication module or a power line communication (PLC) module). A corresponding one of these communication modules may communicate with the external electronic device via the first network  198  (e.g., a short-range communication network, such as Bluetooth™, wireless-fidelity (Wi-Fi) direct, or infrared data association (IrDA)) or the second network  199  (e.g., a long-range communication network, such as a legacy cellular network, a 5G network, a next-generation communication network, the Internet, or a computer network (e.g., LAN or wide area network (WAN)). These various types of communication modules may be implemented as a single component (e.g., a single chip), or may be implemented as multi components (e.g., multi chips) separate from each other. The wireless communication module  192  may identify and authenticate the electronic device  101  in a communication network, such as the first network  198  or the second network  199 , using subscriber information (e.g., international mobile subscriber identity (IMSI)) stored in the subscriber identification module  196 . 
     The wireless communication module  192  may support a 5G network, after a 4G network, and next-generation communication technology, e.g., new radio (NR) access technology. The NR access technology may support enhanced mobile broadband (eMBB), massive machine type communications (mMTC), or ultra-reliable and low-latency communications (URLLC). The wireless communication module  192  may support a high-frequency band (e.g., the mmWave band) to achieve, e.g., a high data transmission rate. The wireless communication module  192  may support various technologies for securing performance on a high-frequency band, such as, e.g., beamforming, massive multiple-input and multiple-output (massive MIMO), full dimensional MIMO (FD-MIMO), array antenna, analog beam-forming, or large scale antenna. The wireless communication module  192  may support various requirements specified in the electronic device  101 , an external electronic device (e.g., the electronic device  104 ), or a network system (e.g., the second network  199 ). According to an embodiment, the wireless communication module  192  may support a peak data rate (e.g., 20 Gbps or more) for implementing eMBB, loss coverage (e.g., 164 dB or less) for implementing mMTC, or U-plane latency (e.g., 0.5 ms or less for each of downlink (DL) and uplink (UL), or a round trip of 1 ms or less) for implementing URLLC. According to an embodiment, the subscriber identification module  196  may include a plurality of subscriber identification modules. For example, the plurality of subscriber identification modules may store different subscriber information. 
     The antenna module  197  may transmit or receive a signal or power to or from the outside (e.g., the external electronic device) of the electronic device  101 . According to an embodiment, the antenna module  197  may include an antenna including a radiating element including a conductive material or a conductive pattern formed in or on a substrate (e.g., a printed circuit board (PCB)). According to an embodiment, the antenna module  197  may include a plurality of antennas (e.g., array antennas). In such a case, at least one antenna appropriate for a communication scheme used in the communication network, such as the first network  198  or the second network  199 , may be selected, for example, by the communication module  190  (e.g., the wireless communication module  192 ) from the plurality of antennas. The signal or the power may then be transmitted or received between the communication module  190  and the external electronic device via the selected at least one antenna. According to an embodiment, another component (e.g., a radio frequency integrated circuit (RFIC)) other than the radiating element may be additionally formed as part of the antenna module  197 . 
     According to certain embodiments, the antenna module  197  may form a mmWave antenna module. According to an embodiment, the mmWave antenna module may include a printed circuit board, a RFIC disposed on a first surface (e.g., the bottom surface) of the printed circuit board, or adjacent to the first surface and capable of supporting a designated high-frequency band (e.g., the mmWave band), and a plurality of antennas (e.g., array antennas) disposed on a second surface (e.g., the top or a side surface) of the printed circuit board, or adjacent to the second surface and capable of transmitting or receiving signals of the designated high-frequency band. For example, the plurality of antennas may include patch array antennas and/or dipole array antennas. 
     At least some of the above-described components may be coupled mutually and communicate signals (e.g., commands or data) therebetween via an inter-peripheral communication scheme (e.g., a bus, general purpose input and output (GPIO), serial peripheral interface (SPI), or mobile industry processor interface (MIPI)). 
     According to an embodiment, commands or data may be transmitted or received between the electronic device  101  and the external electronic device  104  via the server  108  coupled with the second network  199 . Each of the electronic devices  102  or  104  may be a device of a same type as, or a different type, from the electronic device  101 . According to an embodiment, all or some of operations to be executed at the electronic device  101  may be executed at one or more of the external electronic devices  102 ,  104 , or  108 . For example, if the electronic device  101  should perform a function or a service automatically, or in response to a request from a user or another device, the electronic device  101 , instead of, or in addition to, executing the function or the service, may request the one or more external electronic devices to perform at least part of the function or the service. The one or more external electronic devices receiving the request may perform the at least part of the function or the service requested, or an additional function or an additional service related to the request, and transfer an outcome of the performing to the electronic device  101 . 
     The electronic device  101  may provide the outcome, with or without further processing of the outcome, as at least part of a reply to the request. To that end, a cloud computing, distributed computing, mobile edge computing (MEC), or client-server computing technology may be used, for example. The electronic device  101  may provide ultra-low-latency services using, e.g., distributed computing or mobile edge computing. In an embodiment, the external electronic device  104  may include an internet-of-things (IoT) device. The server  108  may be an intelligent server using machine learning and/or a neural network. According to an embodiment, the external electronic device  104  or the server  108  may be included in the second network  199 . The electronic device  101  may be applied to intelligent services (e.g., smart home, smart city, smart car, or healthcare) based on 5G communication technology or IoT-related technology. 
     The electronic device according to certain embodiments may be one of various types of electronic devices. The electronic devices may include, for example, a portable communication device (e.g., a smartphone), a computer device, a portable multimedia device, a portable medical device, a camera, a wearable device, a home appliance, or the like. According to an embodiment of the disclosure, the electronic devices are not limited to those described above. 
     It should be appreciated that certain embodiments of the present disclosure and the terms used therein are not intended to limit the technological features set forth herein to particular embodiments and include various changes, equivalents, or replacements for a corresponding embodiment. With regard to the description of the drawings, similar reference numerals may be used to refer to similar or related elements. It is to be understood that a singular form of a noun corresponding to an item may include one or more of the things, unless the relevant context clearly indicates otherwise. As used herein, each of such phrases as “A or B,” “at least one of A and B,” “at least one of A or B,” “A, B, or C,” “at least one of A, B, and C,” and “at least one of A, B, or C,” may include any one of, or all possible combinations of the items enumerated together in a corresponding one of the phrases. As used herein, such terms as “1st” and “2nd,” or “first” and “second” may be used to simply distinguish a corresponding component from another, and does not limit the components in other aspect (e.g., importance or order). It is to be understood that if an element (e.g., a first element) is referred to, with or without the term “operatively” or “communicatively”, as “coupled with,” “coupled to,” “connected with,” or “connected to” another element (e.g., a second element), the element may be coupled with the other element directly (e.g., wiredly), wirelessly, or via a third element. 
     As used in connection with certain embodiments of the disclosure, the term “module” may include a unit implemented in hardware, software, or firmware, or any combination thereof, and may interchangeably be used with other terms, for example, “logic,” “logic block,” “part,” or “circuitry”. A module may be a single integral component, or a minimum unit or part thereof, adapted to perform one or more functions. For example, according to an embodiment, the module may be implemented in a form of an application-specific integrated circuit (ASIC). 
     Certain embodiments as set forth herein may be implemented as software (e.g., the program  140 ) including one or more instructions that are stored in a storage medium (e.g., internal memory  136  or external memory  138 ) that is readable by a machine (e.g., the electronic device  101 ). For example, a processor (e.g., the processor  120 ) of the machine (e.g., the electronic device  101 ) may invoke at least one of the one or more instructions stored in the storage medium, and execute it, with or without using one or more other components under the control of the processor. This allows the machine to be operated to perform at least one function according to the at least one instruction invoked. The one or more instructions may include a code generated by a complier or a code executable by an interpreter. The machine-readable storage medium may be provided in the form of a non-transitory storage medium. Wherein, the “non-transitory” storage medium is a tangible device, and may not include a signal (e.g., an electromagnetic wave), but this term does not differentiate between where data is semi-permanently stored in the storage medium and where the data is temporarily stored in the storage medium. 
     According to an embodiment, a method according to certain embodiments of the disclosure may be included and provided in a computer program product. The computer program product may be traded as a product between a seller and a buyer. The computer program product may be distributed in the form of a machine-readable storage medium (e.g., compact disc read only memory (CD-ROM)), or be distributed (e.g., downloaded or uploaded) online via an application store (e.g., PlayStore™), or between two user devices (e.g., smart phones) directly. If distributed online, at least part of the computer program product may be temporarily generated or at least temporarily stored in the machine-readable storage medium, such as memory of the manufacturer&#39;s server, a server of the application store, or a relay server. 
     According to certain embodiments, each component (e.g., a module or a program) of the above-described components may include a single entity or multiple entities, and some of the multiple entities may be separately disposed in different components. According to certain embodiments, one or more of the above-described components may be omitted, or one or more other components may be added. Alternatively or additionally, a plurality of components (e.g., modules or programs) may be integrated into a single component. In such a case, according to certain embodiments, the integrated component may still perform one or more functions of each of the plurality of components in the same or similar manner as they are performed by a corresponding one of the plurality of components before the integration. According to certain embodiments, operations performed by the module, the program, or another component may be carried out sequentially, in parallel, repeatedly, or heuristically, or one or more of the operations may be executed in a different order or omitted, or one or more other operations may be added. 
       FIG. 2  illustrates an example of a wireless communication system for providing a network of an audio device and an electronic device according to certain embodiments. According to an embodiment, an audio device  200 , an external audio device  210 , and/or an electronic device  220  of  FIG. 2  may be at least partially similar to the electronic device  101  of  FIG. 1 , or may further include other embodiments of an electronic device. 
     According to certain embodiments referring to  FIG. 2 , the audio devices  200  and  210  and the electronic device  220  may perform communication based on at least one wireless network. For example, the audio devices may be an accessory device including a set of multiple audio devices  200  and  210 , such as a pair of earphones. For example, when the multiple audio devices  200  and  210  are a set, the audio devices  200  and  210  may be paired in advance, and/or information related to their respective addresses may be prestored. For example, the electronic device  220  may include a user terminal such as a smartphone, a tablet PC, a desktop computer, or a laptop computer. For example, the wireless network may include at least one of a wireless LAN, Bluetooth low energy (BLE), an ultra-wideband (UWB), or infrared communication. 
     According to certain embodiments, the electronic device  220  may transmit a data packet including a content such as text, a voice, an image, or a video to the audio devices  200  and  210 . According to an embodiment, according to the type of content included in the data packet, not only the electronic device  220  but also at least one audio device  200  and/or  210  of the audio devices  200  and  210  may transmit a data packet. For example, when the electronic device  220  reproduces a music content, the electronic device  220  may transmit a data packet including the music content to the audio devices  200  and  210 . In another example, when the electronic device  220  performs a call function, not only the electronic device  220  but also at least one audio device  200  and/or  210  of the audio devices  200  and  210  may transmit a data packet including a content (e.g., voice data or audio data) to the electronic device  220 . 
     According to certain embodiments, when the electronic device  220  generates (creates or establishes) multiple communication links with multiple audio devices  200  and  210  for transmission of a data packet, resource consumption and power consumption of the electronic device  220  may increase. Accordingly, the electronic device  220  may form a first communication link  231  with the audio device  200  among the multiple audio devices  200  and  210  to transmit a data packet via the first communication link  231 . The external audio device  210  may monitor ( 235 ) the first communication link  231  to receive the data packet including a content. For example, the first communication link  231  may be established based on a first wireless network. For example, the first wireless network may include at least one of a wireless LAN, Bluetooth, BLE, or infrared communication. For example, the electronic device  220  may be referred to as a device under test (DUT), the audio device  200  may be referred to as a main device (e.g., a primary device, primary equipment, or a primary earbud), and the external audio device  210  may be referred to as an auxiliary device (e.g., a secondary device, secondary equipment, or a secondary earbud). 
     According to certain embodiments, the audio device  200  and the external audio device  210  may be communicatively connected to each other based on a second wireless network. According to an embodiment, the audio device  200  and the external audio device  210  may generate a second communication link  233  based on the second wireless network. For example, the second wireless network may be identical to the first wireless network, or include at least one of a wireless LAN, Bluetooth, BLE, UWB, or infrared communication, as a network different from the first wireless network. 
     According to certain embodiments, the audio device  200  and the external audio device  210  may share information related to the first communication link  231  with each other through the second communication link  233 . According to an embodiment, the audio device  200  and the external audio device  210  may configure a role of each audio device in operation of performing communicative connection. When the audio device  200  is configured as a “primary” device, the audio device  200  may transmit information related to the first communication link  231  to the external audio device  210  via a second communication link  233 . For example, the information associated with the first communication link  231  may include at least one of address information (e.g., at least one of a Bluetooth address or a logical transport (LT) address), clock information (e.g., at least one of a Bluetooth piconet clock or a Master&#39;s CLKN), channel information (e.g., a used channel map), service discovery protocol (SDP) result information, information relating to a supported function (e.g., a supported feature), key information (e.g., a Bluetooth link key), or an extended inquiry response (EIR) packet. 
     According to an embodiment, when supporting the same user account or a similar user account (e.g., a family account), the audio device  200  and the external audio device  210  may share information related to the first communication link  231  with each other through an external device (e.g., an external server  240 ) interworking with the audio device  200  or the external audio device  210  through the user account. For example, when the audio device  200  communicates with the external server  240 , the audio device  200  may transmit the information related to the first communication link  231  to the external server  240 . When the external audio device  210  communicates with the external server  240 , the external audio device  210  may receive the information related to the first communication link  231  from the external server  240 . 
     According to an embodiment, the external audio device  210  may share information related to the first communication link  231  with the electronic device  220 . For example, the electronic device  220  may transmit the information related to the first communication link  231  to the external audio device  210  via a separate link (not shown). For example, the separate link (not shown) may be released when transmission of the information related to the first communication link  231  is completed. In another example, the electronic device  220  may transmit the information related to the first communication link  231  to the external server  240 . When the external audio device  210  can communicate with the external server  240 , the external audio device  210  may receive the information related to the first communication link  231  via the external server  240 . 
     According to certain embodiments, when the audio device  200  is configured as a primary device, the audio device  200  may transmit and/or receive audio data to or from the electronic device  220  via the first communication link  231 . According an embodiment, the audio device  200  may output audio data, based on the information received via the first communication link  231 , from the electronic device  220  to an external environment through at least one speaker of the audio device  200 . According to an embodiment, the audio device  200  may transmit, to the electronic device  220  via the first communication link  231 , audio data collected based on at least one communication parameter related to the first communication link  231  through at least one microphone of the audio device  200 . 
     According to certain embodiments, when the external audio device  210  is configured as a secondary device, the external audio device  210  may monitor (e.g., shadow) ( 235 ) the first communication link  231 , based on the information related to the first communication link  231 . According to an embodiment, the external audio device  210  may retrieve, based on the information passing through the first communication link  231 , a data packet including a content from the electronic device  220  without generating a communication link with the electronic device  220 . For example, the external audio device  210  may acquire audio data transmitted based on the information related to the first communication link  231  by the electronic device  220  via the first communication link  231 . The external audio device  210  may determine a hopping channel (or a frequency hopping channel) of the first communication link  231  through address information and clock information, and may decrypt a data packet encrypted through key information. The external audio device  210  may output audio data to the outside through at least one speaker of the external audio device  210 , the audio data being acquired by decrypting the data packet. For example, the external audio device  210  and the audio device  200  may perform, based on time information synchronized with the audio device  200 , substantially simultaneous output of the audio data acquired via the first communication link  231 . 
     According to certain embodiments, the audio device  200  may switch roles with the external audio device  210 , based on the intensity of noise introduced into the audio device  200  and the external audio device  210 . According to an embodiment, when the intensity of noise detected through a microphone of the audio device  200  satisfies a first reference level within a first time interval, the audio device  200  may transmit a noise level request signal to the external audio device  210 . For example, meeting the first reference level may include a state in which the intensity of noise detected through the microphone of the audio device  200  exceeds the first reference level. For example, when the audio device  200  includes multiple microphones, the intensity of noise detected through the microphone of the audio device  210  may include at least one of an average of intensity of noise detected through multiple microphones, an average of intensity of noise detected through at least one microphone having a relatively lower intensity of noise among multiple microphones, an average of intensity of noise detected through at least one microphone having a relatively higher intensity of noise among multiple microphones, the highest intensity of noise among intensities of noise detected through multiple microphones, or the lowest intensity of noise among intensities of noise detected through multiple microphones. The audio device  200  may identify, based on the noise level request signal, whether the intensity of noise detected through a microphone of the external audio device  210  satisfies a second reference level for a second time interval that is different from the first time interval. When the intensity of noise detected through the microphone of the external audio device  210  satisfies a second reference level that is different from the first reference level for a second time interval, the audio device  200  may determine that the role of the audio device  200  is switched with that of the external audio device  210 . For example, meeting the second reference level may include a state in which the intensity of noise detected through the microphone of the external audio device  210  is equal to or lower than the second reference level. For example, when the external audio device  210  includes multiple microphones, the intensity of the noise detected through the microphone of the external audio device  210  may include at least one of an average of intensity of noise detected through multiple microphones, an average of intensity of noise detected through at least one microphone having a relatively lower intensity of noise among multiple microphones, an average of intensity of noise detected through at least one microphone having a relatively higher intensity of noise among multiple microphones, the highest intensity of noise among intensities of noise detected through multiple microphones, or the lowest intensity of noise among intensities of noise detected through multiple microphones. For example, the first reference level and/or the second reference level may be configured during second link establishment of the audio device  200  and the external audio device  210 . In another example, the audio device  200  may configure the first reference level, based on the intensity of noise detected through the microphone of the audio device  210  for a designated time interval. The external audio device  210  may configure the second reference level, based on the intensity of noise acquired through the microphone of the external audio device  210  for a designated time interval. The audio device  200  and the external audio device  210  may share information related to the first reference level and/or the second reference level. 
     According to an embodiment, the audio device  200  may determine, based on noise introduced into the audio device  200  and the external audio device  210 , the direction of a signal introduced into the audio device  200  and/or  210 . When the audio device  200  determines, based on the direction of a signal, that noise is concentrated in the audio device  200 , the audio device  200  may determine to switch the role with the external audio device  210 . 
     According to certain embodiments, when the role of the external audio device  210  is switched to a primary device by the audio device  200 , the external audio device  210  may be set to transmit and/or receive, based on the information related to the first communication link  231 , audio data to or from the electronic device  220 . According to an embodiment, the external audio device  210  may output audio data to the external environment through at least one speaker of the external audio device  210 , the audio data being received based on the information related to the first communication link  231  from the electronic device  220 . According to an embodiment, the external audio device  210  may transmit audio data to the electronic device  220 , the audio data being collected based on the information related to the first communication link  231  through at least one microphone of the external audio device  210 . 
     According to certain embodiments, when the audio device operates as a “secondary” device through the role switching with the external audio device  210 , the audio device  200  may monitor the first communication link  231  (now established between the electronic device  220  and the external audio device  210 ), based on the information related to the first communication link  231 . According to an embodiment, when the audio device  200  operates as a secondary device, the audio device  200  may perform monitoring (e.g., “shadowing” as described above) based on the information related to the first communication link  231  to acquire audio data transmitted by the electronic device  220  through the first communication link  231 , without having an established connection thereof. The audio device  200  may output the audio data acquired through the monitoring to the outside through at least one speaker of the audio device  200 . According to an embodiment, when the audio device  200  operates as a secondary device, based on the role switching with the external audio device  210 , the audio device  200  may not transmit audio data received through the microphone of the audio device  200  to the electronic device  220 . According to an embodiment, when the audio device  200  operates as a secondary device, based on the role switching with the external audio device  210 , the audio device  200  may continuously or periodically identify the state (e.g., a residual amount of a battery and/or the intensity of noise detected through a microphone) of the audio device  200 . 
       FIG. 3  is a block diagram of an audio device for processing audio data according to certain embodiments. According to an embodiment, an audio device  200  of  FIG. 3  may be at least partially similar to the electronic device  101  of  FIG. 1 , or may include other embodiments of an audio device. 
     According to certain embodiments referring to  FIG. 3 , the audio device  200  may include a processor  310  (e.g., the processor  120  of  FIG. 1 ), an audio module  320  (e.g., the audio module  170  of  FIG. 1 ), a microphone  322  (e.g., the input module  150  of  FIG. 1 ), a speaker  324  (e.g., the sound output module  155  of  FIG. 1 ), a communication circuit  330  (e.g., the wireless communication module  192  of  FIG. 1 ), and/or a memory  340  (e.g., the memory  130  of  FIG. 1 ). In  FIG. 3 , description is made based on elements of the audio device  200 , but the external audio device  210  may include substantially the same elements as an audio device  200 . 
     According to certain embodiments, the processor  310  may control the audio module  320 , the communication circuit  330 , and/or the memory  340 , which are operatively connected to the processor  310 . According to an embodiment, the processor  310  may include an application processor (AP) and/or a communication processor (CP). 
     According to certain embodiments, the processor  310  may control the communication circuit  330  to establish, based on a second wireless network, a communication link (e.g., the second communication link  233  of  FIG. 2 ) with the external audio device  210 . According to an embodiment, the processor  310  may configure a role of the audio device  200  and/or the external audio device  210  in an operation of establishing a communication link with the external audio device  210 . For example, the processor  310  may configure, through a negotiation with the external audio device  210 , the audio device  200  as a primary device (e.g., PE) having a right to control a communication link related to the audio device  200 . In another example, the processor  310  may configure the external audio device  210  as a secondary device (e.g., SE) through a negotiation with the external audio device  210 . For example, the communication link related to the audio device  200  may include a first communication link  231  between the audio device  200  and the electronic device  220  and/or a second communication link  233  between the audio device  200  and the external audio device  210 . 
     According to certain embodiments, when the audio device  200  is configured as a primary device (e.g., PE), the processor  310  may control the communication circuit  330  to establish a communication link (e.g., the first communication link  231  of  FIG. 2 ) with the electronic device  220  through a first wireless network. According to an embodiment, when receiving, through the communication circuit  330 , a signal (e.g., an advertising signal) generated by the electronic device  220 , the processor  310  may determine that the electronic device  220  is adjacent to the audio device  200 . When the processor  310  determines that the electronic device  220  is adjacent to the audio device  200 , the processor may establish a communication link with the electronic device  220 . According to an embodiment, the processor  310  may configure information related to a communication link with the electronic device  220 , through a negotiation with the electronic device  220 . For example, the information related to the communication link with the electronic device  220  may include at least one communication parameter for transmitting and/or receiving audio data (or voice data) by the audio device  200  and the electronic device  220 . For example, when establishing the communication link with the electronic device  220 , the processor  310  may select, based on a codec list shared with the electronic device  220 , a codec to be used for transmission and/or reception of audio data to or from the electronic device  220 . For example, when using a synchronous protocol (e.g., eSCO), the processor  310  may configure at least one of an LT address, a packet type, a packet length, a transmission period (or a transmission interval) (e.g., T eSCO ) of audio data, a retransmission interval (e.g., W eSCO ), or information (e.g., D eSCO ) related to a synchronous configuration through negotiation with the electronic device  220 . For example, the processor  310  may identify a channel resource (e.g., a frequency hopping channel) for transmission and/or reception of audio data generated based on a clock of a master device (e.g., the electronic device  220 ). 
     According to certain embodiments, the processor  310  may control the communication circuit  330  to share the information related to the communication link (e.g., the first communication link  231  of  FIG. 2 ) with the electronic device  220  with the external audio device  210 . According to an embodiment, the processor  310  may control the communication circuit  330  to transmit the information related to the communication link (e.g., the first communication link  231  of  FIG. 2 ) with the electronic device  220  to the external audio device  210 . According to an embodiment, when the audio device  200  and the external audio device  210  can communicate with the external server  240 , the processor  310  may control the communication circuit  330  to transmit the information related to the communication link (e.g., the first communication link  231  of  FIG. 2 ) with the electronic device  220  to the audio device  210  through the external server  240 . 
     According to certain embodiments, when the processor  310  is configured as a primary device, the processor  310  may transmit and/or receive audio data to or from the electronic device  220 . According to an embodiment, when the processor  310  is linked with the electronic device  220  and provides a call function, the processor  310  may transmit and/or receive audio data with the electronic device  220  through the communication circuit  330 . According to an embodiment, the processor  310  may control the audio module  320  to output, to the outside through a speaker  324 , audio data received based on the information related to the communication link (e.g., the first communication link  231  of  FIG. 2 ) with the electronic device  220  from the electronic device  220 . According to an embodiment, the processor  310  may control the communication circuit  330  to transmit, to the electronic device  220 , audio data collected based on the information related to the communication link (e.g., the first communication link  231  of  FIG. 2 ) with the electronic device  220  through a microphone  322 . 
     According to certain embodiments, the processor  310  may detect noise introduced through the microphone  322 . According to an embodiment, when the processor  310  is linked with the electronic device  220  and provides a call function, the processor  310  may identify noise introduced through a microphone  322  at a designated period. For example, when the designated period arrives, the processor  310  may separate noise from audio data (or an audio signal) introduced into the audio device  200  through the microphone  322 . The processor  310  may identify the intensity (e.g., a noise level) of the noise separated from the audio data. For example, when the audio device  200  includes multiple microphones, the intensity of the noise introduced through the microphone  322  may include at least one of an average of intensities of noise detected through multiple microphones, an average of intensities of noise detected through at least one microphone having a relatively lower intensity of noise among multiple microphones, an average of intensities of noise detected through at least one microphone having a relatively higher intensity of noise among multiple microphones, the highest intensity of noise among intensities of noise detected through multiple microphones, or the lowest intensity of noise among intensities of noise detected through multiple microphones. 
     According to certain embodiments, the processor  310  may determine, based on the noise detected through the microphone  322 , whether to identify noise of the external audio device  210 . According to an embodiment, when the intensity (e.g., a noise level) of noise detected through the microphone  322  satisfies a first reference level for a first time interval, the processor  310  may determine to identify noise of the external audio device  210  to determine whether to perform role switching. For example, the state satisfying the first reference level may include a state in which the intensity of noise detected through the microphone  322  exceeds the first reference level. For example, the state satisfying the first reference level for the first time interval may include a state in which the intensity of noise detected through the microphone  322  consecutively satisfies the first reference level by a designated number of times included the first time interval. According to an embodiment, when the intensity of noise detected through the microphone  322  before the first time interval arrives fails to satisfy the first reference level, the processor  310  may determine not to identify noise of the external audio device  210 . When the processor  310  is to transmit audio data to the electronic device  220  or at a designated period, the processor  310  may identify again whether the intensity (e.g., noise level) of noise detected through the microphone  322  satisfies the first reference level for the first time interval. For example, the state of not satisfying the first reference level may include a state in which the intensity of the noise detected through the microphone  322  is equal to or lower than the first reference level. For example, the first time interval may be fixed. In another example, the first time interval may be changed based on the intensity of noise acquired through the microphone  322  or the state (e.g., a residual amount of a battery) of the audio device  200 . For example, the length of the first time interval may be configured in proportion to the intensity of noise acquired through the microphone  322 . In another example, the first time interval may be configured as a first length when the intensity of the noise acquired through the microphone  322  exceeds a fourth reference level, and may be configured as a second length that is relatively shorter than the first length when the intensity of the noise acquired through the microphone  322  is equal or lower than the fourth reference level. For example, the first reference level may be fixed. In another example, the first reference level may be changed based on the intensity of noise acquired through the microphone  322  for a designated time interval. In an example, the first reference level may be configured based on an average of intensities of noise acquired through the microphone  322  for a designated time interval. 
     According to certain embodiments, when the processor  310  determines to identify noise of the external audio device  210 , the processor  310  may identify noise introduced into the external audio device  210 . According to an embodiment, when the processor  310  determines to identify the noise of the external audio device  210 , the processor  310  may periodically identify the noise detected from the external audio device  210 . 
     According to an embodiment, when the processor  310  determines to identify noise of the external audio device  210 , the processor  310  may control the communication circuit  330  to transmit a noise level request signal to the external audio device  210 , based on a designated period for identification of the noise by the external audio device  210 . For example, when the designated period for identification of the noise by the external audio device  210  arrives, the processor  310  may control the communication circuit  330  to transmit the noise level request signal to the audio device  210 . In response to the request level request signal, the processor  310  may receive, from the external audio device  210 , information related to the noise. For example, the information related to the noise may include at least one of the intensity (e.g., a noise level) of noise detected from the external audio device  210  or information related to a result of comparison between the intensity of noise detected from the external audio device  210  and a second reference level. 
     According to an embodiment, when the designated period for identification the noise by the external audio device  210  arrives, the processor  310  may detect the intensity of the noise detected through the microphone  322 . For example, when the intensity (e.g., a noise level) of the noise detected through the microphone  322  satisfies the first reference level, the processor  310  may control the communication circuit  330  to transmit the noise level request signal to the external audio device  210 . In response to the noise level request signal, the processor  310  may receive information related to the noise, from the external audio device  210 . In another example, when the intensity (e.g., a noise level) of the noise detected through the microphone  322  fails to satisfy the first reference level, the processor  310  may restrict transmission of the noise level request signal to the external audio device  210 . 
     According to an embodiment, when a role switch function is activated based on the noise detected through the microphone  322 , the processor  310  may control the communication circuit  330  to transmit the noise level request signal to the external audio device  210 . In response to the noise level request signal, the processor  310  may receive information related to the noise from the external audio device  210 , through the communication circuit  330  at each period for identification of the noise by the external audio device  210 . For example, the second reference level may include a noise level configured to be relatively lower than the first reference level. For example, the period for identification of the noise by the external audio device  210  may be identical to or different from a period for identification of the noise by the audio device  200 . 
     According to certain embodiments, when the processor  310  determines to identify noise of the external audio device  210  to determine whether to perform role switching, the processor  310  may determine, based on the noise detected from the external audio device  210 , whether to perform role switching with the external audio device  210 . According to an embodiment, when the intensity of the noise detected from the external audio device  210  satisfies the second reference level for a second time interval, the processor  310  may determine to perform role switching with the external audio device  210 . For example, the state satisfying the second reference level may include a state in which the intensity of the noise detected from the external audio device  210  is equal to or lower than the second reference level. For example, the state of satisfying the second reference level for the second time interval may include a state in which the intensity of the noise detected from the external audio device  210  consecutively satisfies the second reference level by a designated number of times included the second time interval. According to an embodiment, when the intensity of the noise detected from the external audio device  210  before the second time interval arrives fails to satisfy the second reference level, the processor  310  may determine not to switch the role with the external audio device  210 . For example, the state of not satisfying the second reference level may include a state in which the intensity of the noise detected from the external audio device  210  exceeds the second reference level. For example, the second time interval may be fixed. In another example, the second time interval may be changed based on the intensity of noise detected from the external audio device  210  or the state (e.g., a residual amount of a battery) of the external audio device  210 . For example, the length of the second time interval may be configured in proportion to the intensity of noise detected from the external audio device  210 . In another example, the second time interval may be configured as a third length when the intensity of the noise detected from the external audio device  210  exceeds a fifth reference level, and may be configured as a fourth length that is relatively shorter than the third length when the intensity of the noise detected from the external audio device  210  is equal or lower than the fifth reference level. For example, the second reference level may be fixed. In another example, the second reference level may be changed based on the intensity of noise detected from the external audio device  210  for a designated time interval. In an example, the second reference level may be configured based on an average of intensities of noise detected from the external audio device  210  for a designated time interval. 
     According to certain embodiments, when the processor  310  determines to perform role switching with the external audio device  210 , the processor  310  may perform a role switching procedure with the external audio device  210 . For example, the role switching may include an operation of switching, from the audio device  200  to the external audio device  210 , a device performing a role of transmitting audio data to the electronic device  220  via a communication link (e.g., the first communication link  231  of  FIG. 2 ) with the electronic device  220 . According to an embodiment, when the processor determines to perform role switching with the external audio device  210 , the processor  310  may configure a role switch time point. The processor  310  may control the communication circuit  330  to transmit a role switch request signal including the role switch time point to the external audio device  210 . When the role switch time point arrives, the processor  310  may switch the audio device  200  as a secondary device driven based on a control of the external audio device  210  configured as a primary device. 
     According to an embodiment, when the role of the audio device  200  is switched as a secondary device, the processor  310  may control the communication circuit  330  to monitor the first communication link  231  on the basis of the information related to the communication link (e.g., the first communication link  231  of  FIG. 2 ) with the electronic device  220 . The processor  310  may control the audio module  320  to output audio data acquired through monitoring to the outside through the speaker  324 . According to an embodiment, when the role of the audio device  200  is switched as a secondary device, the processor  310  may control the communication circuit  330  not to transmit audio data collected through the microphone  322  to the electronic device  220 . 
     According to certain embodiments, the audio module  320  may convert an audio signal collected through the microphone  322  into an electrical signal (e.g., audio data) and transmit the same to the processor  310 . According to certain embodiments, the audio module  320  may convert an electrical signal received from the processor  310  into an audio signal and output the same through the speaker  324 . For example, the electrical signal received from the processor  310  may be at least partially based on the audio data received from the electronic device  220  through the communication circuit  330 . 
     According to certain embodiments, the microphone  322  may collect an audio signal generated around the audio device  200 . According to an embodiment, the microphone  322  may include multiple microphones for collecting audio signals in different directions. 
     According to certain embodiments, the speaker  324  may output the audio signal to the outside. According to an embodiment, the speaker  324  may include multiple speakers oriented in different directions. 
     According to certain embodiments, the communication circuit  330  may support wireless communication with the external audio device  210  and/or the electronic device  220 . According to an embodiment, the communication circuit  330  may transmit and/or receive audio data through a communication link (e.g., the first communication link  231  of  FIG. 2 ) established with the electronic device  220 . According to an embodiment, the communication circuit  330  may transmit and/or receive a signal (e.g., a noise level request signal or a role switch request signal) and/or data (e.g., information related to noise) through a communication link (e.g., the second communication link  233  of  FIG. 2 ) established with the external audio device  210 . 
     According to certain embodiments, the memory  340  may store various data used by at least one element (e.g., the processor  310 , the audio module  320 , or the communication circuit  330 ) included in the audio device  200 . For example, the data may include a reference (e.g., the first reference level and/or the first time interval) for determining whether to identify noise of the external audio device  210 , a reference (e.g., the second reference level and/or the second time interval) for determining whether to switch the role with the external audio device  210 , or information related to the communication link with the electronic device  220 . According to an embodiment, the memory  340  may store various instructions which can be executed through the processor  310 . 
     According to certain embodiments, the audio device  200  may determine whether to perform role switching with the external audio device  210 , based on the intensities of noise detected from the external audio device  210  and noise detected through the microphone  322 . According to an embodiment, when the noise detected through the microphone  322  for the first time interval satisfies the first reference level, the processor  310  may identify the intensity of the noise of the external audio device  210 , based on information related to the noise received, based on a designated period, from the external audio device  210 . 
     According to an embodiment, when the intensity of the noise of the external audio device  210  is equal to or lower than the intensity of the noise detected through the microphone  322 , the processor  310  may identify whether the intensity of the noise of the external audio device  210  satisfies the second reference level. For example, when the intensity of the noise of the external audio device  210  satisfies the second reference level for the second time interval, the processor  310  may determine to perform role switching with the external audio device  210 . In another example, when the intensity of the noise detected from the external audio device  210  fails to satisfy the second reference level before the expiration of the designated second time interval, the processor  310  may determine not to perform role switching with the external audio device  210 . According to an embodiment, when the intensity of the noise of the external audio device  210  is higher than the intensity of the noise detected through the microphone  322 , the processor  310  may determine not to perform role switching with the external audio device  210 . For example, the intensity of the noise detected through the microphone  322  may include at least one of the intensity of noise detected through the microphone  322  at a time point (e.g., a designated period) identical to or similar to a time point at which the external audio device  210  detects noise, an average of intensities of noise detected through the microphone  322  for the first time interval, or an average of intensities of noise detected through the microphone  322  for the first time interval and the second time interval. For example, the average of intensities of the noise may include at least one of an average of intensities of all noises measured for a designated time interval (e.g., the first time interval and/or the second time interval), an average of intensities of a designated number of noises each having a relatively high intensity of noise, or an average of intensities of noise remaining after excluding the maximum noise intensity and the minimum noise intensity. 
     According to certain embodiments, the audio device  200  may determine not to perform role switching, based on the noise detected through the microphone  322  in a state in which the intensity of the noise of the external audio device  210  is identified. According to an embodiment, the processor  310  may detect, based on a designated period, the noise through the microphone  322  while identifying the noise of the external audio device  210 . The processor  310  may determine not to perform role switching when the intensity of the noise detected through the microphone  322  satisfies a third reference level relatively lower than the first reference level for a third time interval. For example, the processor  310  may determine that a call function can be provided through the microphone  322  of the audio device  200  and determine not to perform role switching with the external audio device  210 . For example, the state satisfying the third reference level may include a state in which the intensity of the noise detected through the microphone  322  is equal to or lower than the third reference level. For example, the state satisfying the third reference level for the third time interval may include a state in which the intensity of the noise detected through the microphone  322  consecutively satisfies the third reference level by a designated number of times included in the third time interval. For example, when processor  310  determines not to perform role switching with the external audio device  210 , the processor  310  may control the communication circuit  330  to transmit a noise level suspension signal to the external audio device  210 . For example, when the intensity of the noise detected through the microphone  322  fails to satisfy the third reference level before the third time interval arrives, the processor  310  may determine, based on the intensity of the noise of the external audio device  210 , whether to perform role switching with the external audio device  210 . For example, the third time interval may be configured in the same manner as or a different manner from the second time interval, and may be configured based on the intensity of the noise acquired through the microphone  322  or the state (e.g., a residual amount of a battery) of the audio device  200 . For example, the third reference level corresponds to a reference level for determining, based on the intensity of the noise introduced through the microphone  322 , whether the microphone  322  can be used for a call function, and may configured in the same manner as or a different manner from the second reference level 
     According to certain embodiments, the external audio device  210  may transmit the information related to the noise detected from the external audio device  210 , to the audio device  200 . According to an embodiment, the external audio device  210  may transmit, to the audio device  200 , the information on the noise detected, based on the noise level request signal received from the audio device  200 , through the microphone of the external audio device  210 . According to an embodiment, when the external audio device  210  receives the noise level request signal from the audio device  200 , the external audio device  210  may detect the noise through the microphone of the external audio device  210 . The external audio device  210  may transmit a result of comparison between the noise detected through the microphone and the second reference level to the audio device  200 . 
     According to certain embodiments, when the external audio device  210  is configured as a secondary device, the external audio device  210  may determine whether to perform role switching with the audio device  200 . According to an embodiment, the external audio device  210  may detect the noise through the microphone of the external audio device  210 , based on a designated period. When the external audio device  210  receives a noise request signal from the audio device  200 , the external audio device  210  may determine that the intensity of the noise introduced through the microphone  322  of the audio device  200  is relatively high. In order to determine whether the microphone of the external audio device  210  can be used, the external audio device  210  may identify whether the intensity of the noise detected from the external audio device  210  satisfies the second reference level for the second time interval. When the intensity of the noise detected from the external audio device  210  satisfies the second reference level for the second time interval, the external audio device  210  may determine to perform role switching with the audio device  200 . For example, when the external audio device  210  determines to perform role switching with the audio device  200 , the external audio device  210  may transmit a role switch request signal to the audio device  200 . For example, the role switch request signal may include information related to a role switch time point. According to an embodiment, when the intensity of the noise detected from the external audio device  210  fails to satisfy the second reference level for the second time interval, the external audio device  210  may determine not to perform role switching with the audio device  200 . According to an embodiment, the audio device  200  may perform role switching based on the role switch request signal. 
     According to an embodiment, the external audio device  210  may detect, based on a designated period, the noise through the microphone of the external audio device  210 . For example, when the intensity of the noise detected from the external audio device  210  satisfies the second reference level for the second time interval, the external audio device  210  may determine to perform role switching with the audio device  200 . When the external audio device  210  determines to perform role switching with the audio device  200 , the external audio device  210  may transmit a role switch request signal to the audio device  200 . For example, the role switch request signal may include information related to a role switch time point. In another example, when the intensity of the noise detected from the external audio device  210  fails to satisfy the second reference level for the second time interval, the external audio device  210  may determine not to perform role switching with the audio device  200 . According to an embodiment, when receiving the role switch request signal from the external audio device  210 , the audio device  200  may identify whether the noise received through the microphone  322  of the audio device  200  satisfies the first reference level for the first time interval. For example, when the noise satisfies the first reference level for the first time interval, the audio device  200  may perform role switching based on the role switch request from the external audio device  210 . In another example, when the noise fails to satisfy the first reference level for the first time interval, the audio device  200  may reject the role switch request from the external audio device  210 . 
     According to certain embodiments, the external audio device  210  may transmit, to the audio device  200 , the information related to the noise detected, based on a designated period, from the microphone of the external audio device  210 . According to an embodiment, the designated period arrives, the external audio device  210  may transmit, to the audio device  200 , information on the noise (e.g., a noise level) detected through the microphone of the external audio device  210 . According to an embodiment, the external audio device  210  may transmit a result of comparison between the second reference level and the noise detected through the microphone of the external audio device  210  to the audio device  200 . 
     According to an embodiment, when the noise of the external audio device  210  satisfies, based on the information on the noise received from the external audio device  210 , the second reference level for the second time interval, the audio device  200  may identify the intensity of the noise detected through the microphone  322  of the audio device  200 . When the intensity (e.g., a noise level) of the noise detected through the microphone  322  satisfies the first reference level for the first time interval, the audio device  200  may determine to perform role switching with the external audio device  210 . 
     According to an embodiment, the intensity (e.g., a noise level) of the noise detected through the microphone  322  satisfies the first reference level for the first time interval, the audio device  200  may identify, based on the information on the noise periodically received from the external audio device  210 , the intensity of the noise of the external audio device  210 . When the intensity of the noise of the external audio device  210  satisfies the second reference level for the second time interval, the audio device  200  may determine to perform role switching with the external audio device  210 . 
     According to certain embodiments, the external audio device  210  may detect the noise of the external audio device  210  through the microphone of the external audio device  210 , based on a designated period. When the intensity (e.g., a noise level) of the noise of the external audio device  210  continuously satisfies the second reference level for a designated second time interval, the external audio device  210  may transmit state information of the microphone to the audio device  200 . For example, the state information of the microphone may include at least one of information indicating that audio data is collectable using the microphone of the external audio device  210 , or the intensity of the noise of the external audio device  210 . For example, the intensity of the noise of the external audio device  210  may include an average of intensities of noise measured from the external audio device  210  for the second time interval, the maximum value of the intensity of the noise measured from the external audio device  210  for the second time interval, or the minimum value of the intensity of the noise measured from the external audio device  210  for the second time interval. 
     According to an embodiment, when receiving the state information of the microphone of the external audio device  210 , the audio device  200  may identify the intensity of the noise detected through the microphone  322  of the audio device  200 . When the intensity (e.g., a noise level) of the noise detected through the microphone  322  satisfies the first reference level for the first time interval, the audio device  200  may determine to perform role switching with the external audio device  210 . 
     According to an embodiment, when receiving the state information of the microphone from the external audio device  210 , the audio device  200  may identify the intensity of the noise detected through the microphone  322  of the audio device  200 . When the intensity (e.g., a noise level) of the noise detected through the microphone  322  exceeds the intensity of the noise of the external audio device  210  for the first time interval and satisfies the first reference level, the audio device  200  may determine to perform role switching with the external audio device  210 . 
     According to certain embodiments, the audio device  200  may determine whether to perform role switching, based on a difference between the noise intensity of the audio device  200  and the noise intensity of the external audio device  210 . According to an embodiment, the audio device  200  may identify the intensity of noise (e.g., an average of intensities of noise) detected through the microphone  322  of the audio device  200  for a fourth time interval having a designated length. The audio device  200  may identify the intensity of noise (e.g., an average of intensities of noise) of the external audio device  210  for a fifth time interval having a designated length. For example, the fourth time interval and the fifth time interval may include non-overlapping time intervals having the same length. 
     According to an embodiment, the audio device  200  may detect a difference between the intensity of the noise detected from the audio device  200  for the fourth time interval and the intensity of the noise detected from the external audio device  210  for the fifth time interval. For example, when a difference between the intensity of the noise detected from the audio device  200  for the fourth time interval and the intensity of the noise detected from the external audio device  210  for the fifth time interval is greater than a designated reference interval or longer, the audio device  200  may determine to perform role switching with the external audio device  210 . In another example, a difference between the intensity of the noise detected from the audio device  200  for the fourth time interval and the intensity of the noise detected from the external audio device  210  for the fifth time interval is smaller than a designated reference interval, the audio device  200  may determine not to perform role switching with the external audio device  210 . In another example, when the intensity of the noise detected from the audio device  200  for the fourth time interval is lower than or equal to the intensity of the noise detected from the external audio device  210  for the fifth time interval, the audio device  200  may determine not to perform role switching with the external audio device  210 . 
     According to certain embodiments, when the audio device  200  is configured as a primary device, the audio device  200  may transmit audio data collected through the microphone  322  to the electronic device  220 . When receiving a retransmission request signal (e.g., a NACK signal) related to the audio data from the electronic device  220 , the audio device  200  may perform role switching with the external audio device  210 . When a retransmission interval arrives based on the role switching with the audio device  200 , the external audio device  210  may transmit audio data collected through the microphone of the external audio device  210  to the electronic device  220 . 
     According to an embodiment, the audio device  200  and the external audio device  210  may maintain the switched role even after the retransmission of the audio data is completed. For example, when the role of the external audio device  210  is switched as a primary device and a transmission interval of the audio data arrives, the external audio device  210  may transmit the audio data collected through the microphone of the external audio device  210  to the electronic device  220 . 
     According to an embodiment, the audio device  200  and the external audio device  210  may perform role switching again once the retransmission of the audio data is completed. For example, when the retransmission of the audio data is completed, the role of the audio device  200  may be switched as a primary device. 
     According to certain embodiments, when performing role switching, the audio device  200  and the external audio device  210  may perform role switching again based on the quality of communication with the electronic device  220 . According to an embodiment, when audio data transmission is consecutively performed by a designated number of times or more after the audio device  200  and the external audio device  210  perform role switching, the roles of the audio devices  200  and  210  may be switched again. 
     According to certain embodiments, the audio device  200  and the external audio device  210  may perform role switching based on the quality of communication with the electronic device  220 . According to an embodiment, when the audio device  200  determines to perform role switching with the external audio device  210 , based on the noise of the audio device  200  and the noise of the external audio device  210 , the audio device  200  may identify the quality of communication with the electronic device  220 . For example, when the audio device  200  determines that the quality of communication with the electronic device  220  satisfies a designated condition, the audio device  200  may determine not to perform role switching with the external audio device  210 . For example, a state in which the quality of communication with the electronic device  220  satisfies a designated condition may include a state in which the quality of a call with the electronic device  220  exceeds a designated reference quality. In another example, when the audio device  200  determines that the quality of communication with the electronic device  220  fails to satisfy a designated condition, the audio device  200  may perform role switching with the external audio device  210 . For example, a state in which the quality of communication with the electronic device  220  fails to satisfy a designated condition may include a state in which the quality of a call with the electronic device  220  is lower than or equal to a reference quality. For example, the quality of communication with the electronic device  220  may be configured based on the number of times of retransmission of audio data generated for a designated time interval. 
       FIG. 4  is a block diagram of an electronic device for processing audio data according to certain embodiments. According to an embodiment, an electronic device  220  of  FIG. 4  may be at least partially similar to the electronic device  101  of  FIG. 1  or may further include other embodiments of an electronic device. 
     According to certain embodiments referring to  FIG. 4 , the electronic device  220  may include a processor  410  (e.g., the processor  120  of  FIG. 1 ), a first communication circuit  420  (e.g., the wireless communication module  192  of  FIG. 1 ), a second communication circuit  430  (e.g., the wireless communication module  192  of  FIG. 1 ), and/or a memory  440  (e.g., the memory  130  of  FIG. 1 ). 
     According to certain embodiments, the processor  410  may control the first communication circuit  420 , the second communication circuit  430 , and/or the memory  440  operatively connected thereto. According to an embodiment, the processor  410  may include an application processor (AP) and/or a communication processor (CP). 
     According to certain embodiments, the processor  410  may control the second communication circuit  430  to perform communication based on a first wireless network with the audio device  200 . For example, the first wireless network may include at least one of a wireless LAN, Bluetooth, BLE, UWB, or infrared communication. According to an embodiment, when the processor  410  establishes a communication link (e.g., the first communication link  231  of  FIG. 2 ) with the audio device  200  through the second communication circuit  430 , the processor  410  may configure information related to the communication link with the audio device  200  through negotiation with the audio device  200 . For example, the processor  410  may generate a channel resource (e.g., a frequency hopping channel) for transmission and/or reception of audio data generated based on a clock of the electronic device  220 . For example, the information related to the communication link with the audio device  200  may include at least one communication parameter for transmitting and/or receiving audio data (or voice data) by the audio device  200  and the electronic device  220 . For example, at least one communication parameter related to the communication link with the audio device  200  may include at least one of a codec, an LT address, a packet type, a packet length, a transmission period (or a transmission interval) (e.g., T eSCO ) of audio data, a retransmission interval (e.g., W eSCO ), or information (e.g., D eSCO ) related to a synchronous configuration. 
     According to an embodiment, the processor  410  may share, with the external audio device  210 , the information related to the communication link with the audio device  200 . For example, the processor  410  may control the second communication circuit  430  to transmit information related to the communication link (e.g., the first communication link  231  of  FIG. 2 ) with the audio device  200  to the external audio device  210  via a separate communication link (not shown). For example, the separate link (not shown) may be released when the transmission of the information related to the first communication link  231  is completed. In another example, the processor  410  may control the first communication circuit  420  (or the second communication circuit  430 ) to transmit the information related to the communication link (e.g., the first communication link  231  of  FIG. 2 ) with the audio device  200  to the external server  240 . When the external audio device  210  can communicate with the external server  240 , the external audio device  210  may receive information related to the first communication link  231  from the external server  240 . 
     According to certain embodiments, the processor  410  may control the first communication circuit  420  to perform communication based on a third wireless network with an external electronic device (e.g., the electronic device  102  or  104  or the server  108  of  FIG. 1 ). For example, the third wireless network may include at least one of a 2G network, a 3G network, a 4G network (e.g., a long-term evolution (LTE) network), or a 5G network (e.g., a new radio (NR) network). 
     According to certain embodiments, the processor  410  may transmit and/or receive audio data, based on information related to the communication link (e.g., the first communication link  231  of  FIG. 2 ) with the audio device  200 . According to an embodiment, when the processor  410  provides a call function using the audio device  200 , the processor  410  may transmit and/or receive audio data, based on information related to the communication link (e.g., the first communication link  231  of  FIG. 2 ) with the audio device  200 . For example, the processor  410  may control the second communication circuit  430  to transmit audio data received from the external electronic device via the first communication circuit  420  via the communication link (e.g., the first communication link  231  of  FIG. 2 ) with the audio device  200 , based on the information related to the communication link (e.g., the first communication link  231  of  FIG. 2 ) with the audio device  200 . According to an embodiment, the processor  410  may control the second communication circuit  430  to receive audio data via the communication link (e.g., the first communication link  231  of  FIG. 2 ) with the audio device  200 , based on the information related to the communication link (e.g., the first communication link  231  of  FIG. 2 ) with the audio device  200 . The processor  410  may control the first communication circuit  420  to transmit the audio data received from the audio device  200  to the external electronic device. 
     According to an embodiment, the processor  410  may transmit and/or receive audio data, based on information related to the communication link (e.g., the first communication link  231  of  FIG. 2 ) with the audio device  200 , regardless of role switching of the audio device  200  and the external audio device  210 . For example, the processor  410  may transmit the audio data to the audio device  200  and/or the external audio device  210  via the first communication link  231 , and may receive the audio data from the audio device  200  and/or the external audio device  210  via the first communication link  231 . 
     According to certain embodiments, the first communication circuit  420  may support wireless communication with the external electronic device via the third wireless network. According to an embodiment, the first communication circuit  420  may include a first radio frequency integrated circuit (RFIC) and a first radio frequency front end (RFFE) for communication with the external electronic device via the third wireless network. 
     According to certain embodiments, the second communication circuit  430  may support wireless communication with the audio device  200  or the external audio device  210  via the second wireless network. According to an embodiment, the second communication circuit  430  may include a second RFIC and a second RFFE for wireless communication with the audio device  200  or the external audio device  210  via the second wireless network. 
     According to certain embodiments, the memory  440  may store various data used by at least one element (e.g., the processor  410 , the first communication circuit  420 , or the second communication circuit  430 ) included in the electronic device  220 . For example, the data may include information related to at least one communication parameter related to the communication link with the audio device  200 . According to an embodiment, the memory  440  may store various instructions which can be executed through the processor  410 . 
     According to certain embodiments, the electronic device  220  may perform control to switch roles of the audio device  200  and the external audio device  210 , based on noise detected from the audio device  200  and the external audio device  210 . For example, the electronic device  220  may receive, from the audio device  200 , information related to the external audio device  210  for monitoring the first communication link  231  established between the audio device  200  and the electronic device  220 . In another example, the electronic device  220  may receive, from the audio device  200 , information indicating that a device for transmitting audio data to the electronic device  220  for a retransmission interval of the first communication link  231  corresponds to the external audio device  210 . According to an embodiment, when the electronic device  220  is linked with the audio device  200  and/or the external audio device  210  and provides a call function, the electronic device  220  may receive, at each designated period from the audio device  200  configured as a primary device, information related to noise detected from the audio device  200 . When the electronic device  220  determines based on the noise detected from the audio device  200  that a role switching function of the audio devices  200  and  210  is activated, the electronic device  220  may transmit a noise level request signal related to the external audio device  210  configured as a secondary device to the audio device  200 . For example, the electronic device  220  may receive information related to the noise from the audio device  200  via a separate communication link with the first communication link  231  for transmitting and/or receiving the audio data. 
     According to an embodiment, the electronic device  220  may receive, based on the noise level request signal related to the external audio device  210  at each designated period from the audio device  200  configured as a primary device, information related to noise detected from the external audio device  210  configured as a secondary device. The electronic device  220  determines to perform role switching of the audio devices  200  and  210 , based on the noise detected from the external audio device  210 , the electronic device may transmit a role switch request signal to the audio device  200 . For example, when the electronic device  220  determines based on the noise detected from the audio device  200  and the external audio device  210  that noise is concentrated in the direction of the audio device  200 , it may be determined that role switching of the audio devices  200  and  210  is performed. 
     According to certain embodiments, the electronic device  220  may receive audio data from the external audio device  210  or the audio device  200  configured as a primary device, based on the information related to the first communication link  231 . According to an embodiment, the electronic device  220  may receive, from the audio device  200  configured as a primary device, information related to the external audio device  210  configured as a secondary device. According to an embodiment, the electronic device  220  may detect noise from audio data received from the audio device  200  configured as a primary device. When the intensity of noise detected from the audio data received from the audio device  200  satisfies a first reference level for a first time interval, the electronic device  220  may transmit a role switch request signal via the first communication link  231 . 
     According to an embodiment, the electronic device  220  may detect, based on the role switching, noise from the audio data received from the external audio device  210  configured as a primary device (for example, configured as a device for transmitting audio data to the electronic device  220 ). When the intensity of the noise detected from the audio data received from the external audio device  210  satisfies a second reference level for a second time interval, the electronic device  220  may transmit a role switch request signal via the first communication link  231 . For example, the electronic device  220  may receive role switch completion information from the audio device  200  or the external audio device  210  via the first communication link  231 . 
     According to certain embodiments, an audio device (e.g., the electronic device  101  of  FIG. 1  or the audio device  200  of  FIG. 2  or  FIG. 3 ) may include at least one microphone (e.g., the input module  150  of  FIG. 1  or the microphone  322  of  FIG. 3 ), a communication circuit (e.g., the wireless communication module  192  of  FIG. 1  or the communication circuit  330  of  FIG. 3 ), and at least one processor (e.g., the processor  120  of  FIG. 1  or the processor  310  of  FIG. 3 ) operatively connected to the at least one microphone and the communication circuit, in which the processor establishes a communication link (e.g., the first communication link  231  of  FIG. 2 ) with an electronic device (e.g., the electronic device  220  of  FIG. 2 ) via the communication link, transmits information related to the communication link to an external audio device (e.g., the external audio device  210  of  FIG. 2 ) via the communication circuit, detects noise from an audio signal collected through the at least one microphone, identifies the noise of the external audio device when the noise detected through the at least one microphone satisfies a designated first condition, and controls the external audio device to transmit audio data to the electronic device when the noise for the external audio device satisfies a second condition that is different from the designated first condition. 
     According to certain embodiments, the audio device may further include at least one speaker (e.g., the sound output module  155  of  FIG. 1  or the speaker  324  of  FIG. 3 ), in which when the role for performing communication with the electronic device is configured as a primary device, the processor outputs audio data received from the electronic device via the communication link to the outside through the at least one speaker, and transmits audio data collected through the at least one microphone to the electronic device via the communication link. 
     According to certain embodiments, the processor may detect, based on a designated period, the noise through the at least one microphone, identify whether the noise detected through the microphone satisfies a first reference level for a designated first time interval when the noise detected through the at least one microphone satisfies the first reference level, and determine that the designated first condition is satisfied when noise satisfying the first reference level is continuously detected through the at least one microphone for the designated first time interval. 
     According to certain embodiments, the first time interval may be configured based on a battery state of the audio device and the noise detected through the at least one microphone. 
     According to certain embodiments, the processor may determine that the first reference level is satisfied when the noise detected through the at least one microphone exceeds the first reference level. 
     According to certain embodiments, the processor may periodically transmit a noise level request signal to the external audio device, based on a noise detection period of the external audio device when the noise detected through the at least one microphone satisfies the designated first condition, and receive information related to the noise from the external audio device in response to the noise level request signal. 
     According to certain embodiments, the processor may detect, based on the noise detection period of the external audio device, noise through the at least one microphone, and transmit the noise level request signal to the external audio device when the noise detected through the microphone satisfies a first reference level. 
     According to certain embodiments, the processor may transmit a noise level request signal to the external audio device when the noise detected through the microphone satisfies the designated first condition, and periodically receive information related to noise of the external audio device from the external audio device. 
     According to certain embodiments, the processor may identify whether the noise of the external audio device satisfies a second reference level for a designated second time interval when the noise of the external audio device satisfies the second reference level, and determine that the designated second condition is satisfied when the noise of the external audio device continuously satisfies the second reference level for the designated second time interval. 
     According to certain embodiments, the second time interval corresponds to a time interval which is different from or at least partially overlaps a first time interval included in the first designated condition, and may be configured based on a battery state of the external audio device and the noise of the external audio device. 
     According to certain embodiments, when the noise of the external audio device is equal to or lower than the second reference level that is relatively lower than a first reference level included in the first designated condition, the processor may determine that the second reference level is satisfied. 
       FIG. 5  is a flow chart  500  illustrating switching of a role of an audio device in an audio device according to certain embodiments. Operations in the following embodiment may be sequentially performed, but sequential execution is not mandatory and other variations are contemplated. For example, the sequences of the operations may be changed, and two or more operations may be performed in parallel. For example, the audio device of  FIG. 5  may be the electronic device  101  of  FIG. 1  or the audio device  200  of  FIG. 2  or  FIG. 3 . 
     According to certain embodiments referring to  FIG. 5 , in operation  501 , an audio device (e.g., the processor  120  or the wireless communication module  192  of  FIG. 1  or the processor  310  or the communication circuit  330  of  FIG. 3 ) may establish a first communication link (e.g., the first communication link  231  of  FIG. 2 ) with the electronic device  220 . According to an embodiment, the processor  310  may control the communication circuit  330  to establish the first communication link  231  with the electronic device  220  via a first wireless network. According to an embodiment, when the processor  310  establishes the first communication link  231  with the electronic device  220 , the processor  310  may configure information related to the communication link with the electronic device  220  through negotiation with the electronic device  220 . For example, the information related to the communication link with the electronic device  220  may include at least one communication parameter for transmitting and/or receiving audio data (or voice data) by the audio device  200  and the electronic device  220 . For example, the information related to the communication link with the electronic device  220  may include at least one of a channel resource for transmission and/or reception of audio data, a codec, an LT address, a packet type, a packet length, a transmission period (or a transmission interval) (e.g., T eSCO ) of audio data, a retransmission interval (e.g., W eSCO ), or information (e.g., D eSCO ) related to a synchronous configuration. 
     According to certain embodiments, in operation  503 , an audio device  200  (e.g., the processor  120  or  310 , the wireless communication module  192 , or the communication circuit  330 ) may share the information related to the first communication link with the external audio device  210 . According to an embodiment, the processor  310  may control the communication circuit  330  to transmit, to the external audio device  210 , the information related to the communication link (e.g., the first communication link  231  of  FIG. 2 ) with the electronic device  220  via the communication link (e.g., the second communication link  233  of  FIG. 2 ) with the external audio device  210 . For example, the communication link (e.g., the second communication link  233  of  FIG. 2 ) with the external audio device  210  may be established before or after the audio device  200  establishes the first communication link  231  with the electronic device  220 . According to an embodiment, the processor  310  may transmit, to the external server  240 , the information related to the communication link (e.g., the first communication link  231  of  FIG. 2 ) with the electronic device  220 . The external audio device  210  may acquire the information related to the communication link (e.g., the first communication link  231  of  FIG. 2 ) with the electronic device  220  from the external server  240 . 
     According to certain embodiments, in operation  505 , the audio device  200  (e.g., the processor  120  or  310 ) may detect noise (e.g., a noise level) present in an audio signal. According to an embodiment, the processor  310  may collect an audio signal through a microphone  322  at a designated period. The processor  310  may detect a level of noise present in the audio signal collected through the microphone  322 . 
     According to certain embodiments, in operation  507 , the audio device (e.g., the processor  120  or  310 ) may determine whether the noise of the audio device  200  detected through the microphone satisfies a designated first condition. According to an embodiment, the processor  310  may identify whether the intensity (e.g., a noise level) of the noise detected through the microphone  322  satisfies a first reference level for a first time interval. For example, satisfying the first reference level may include a state in which the intensity of the noise detected through the microphone  322  exceeds the first reference level. For example, satisfying the first reference level for the first time interval may include a state in which the intensity of the noise detected through the microphone  322  consecutively reaches the first reference level a designated number of times within the first time interval. According to an embodiment, when the intensity of the noise detected through the microphone  322  satisfies a first reference level for the first time interval, the processor  310  may determine that a designated first condition is satisfied. According to an embodiment, when the intensity of the noise detected through the microphone  322  fails to satisfy the first reference level within the first time interval or before the first time interval is configured, the processor  310  may determine that the designated first condition fails to be satisfied. For example, the state not satisfying the first reference level may include a state in which the intensity of the noise detected through the microphone  322  is equal to or lower than the first reference level. 
     According to certain embodiments, when it is determined that the noise detected from the audio device  200  through the microphone fails to satisfy the designated first condition (e.g., “No” in operation  507 ), the audio device (e.g., the processor  120  or  310 ) may terminate the process of role switching for the audio device  200 . According to an embodiment, when it is determined that the noise detected from the audio device  200  through the microphone fails to satisfy the designated first condition, the processor  310  may determine that a call function can be provided (or maintained) through the microphone  322  of the audio device  200 . When it is determined that the call function can be provided through the microphone  322  of the audio device  200 , the processor  310  may determine that the role switching of the audio device  200  and the external audio device  210  is unnecessary. According to an embodiment, when it is determined that the role switching of the audio device  200  and the external audio device  210  is unnecessary, the audio device  200  may perform an operation (e.g., operation  505 ) of determining whether the noise of the audio device  200  satisfies the designated first condition for a designated period or in a case where a designated event (e.g., occurrence of big noise) occurs. 
     According to certain embodiments, when it is determined that the noise detected from the audio device  200  through the microphone satisfies the designated first condition (e.g., if “Yes” in operation  507 ), the audio device (e.g., the processor  120  or  310 ) may identify in operation  509  whether the noise of a second audio signal generated via the external audio device  210  satisfies a designated second condition. According to an embodiment, when it is determined that the noise detected through the microphone  322  satisfies the designated first condition, the processor  310  may control the communication circuit  330  to transmit a noise level request signal to the external audio device  210 . The processor  310  may receive the information related to the noise of the second audio signal from the external audio device  210  through the communication circuit  330  in response to the noise level request signal. For example, the processor  310  may transmit the noise level request signal to the external audio device  210 , based on the designated period, and identify the noise of the external audio device  210 . In another example, the processor  310  may periodically receive the information related to the noise from the external audio device  210 , based on the noise level request signal. For example, the information related to the noise may include at least one of the intensity (e.g., a noise level) of the noise detected from the external audio device  210  or information related to a result of comparison between the intensity of the noise detected from the external audio device  210  and a second reference level. 
     According to an embodiment, the processor  310  may identify whether the intensity of the noise detected from the external audio device  210  satisfies the second reference level for a second time interval. For example, satisfying the second reference level may include a state in which the intensity of the noise detected from the external audio device  210  is equal to or lower than the second reference level. For example, satisfying the second reference level for the second time interval may include a state in which the intensity of the noise detected from the external audio device  210  consecutively meets the second reference level a designated number of times within the second time interval. According to an embodiment, when the intensity of the noise detected from the external audio device  210  satisfies the second reference level for the second time interval, the processor  310  may determine that a designated second condition is satisfied. According to an embodiment, when the intensity of the noise detected from the external audio device  210  fails to satisfy the second reference level for the second time interval or before the second time interval is configured, the processor  310  may determine that the designated second condition fails to be satisfied. For example, failing to meet the second reference level may include a state in which the intensity of the noise detected from the external audio device  210  exceeds the second reference level. According to an embodiment, the second reference level may be identical or lower than the first reference level. 
     According to certain embodiments, when it is determined that the noise of the external audio device  210  fails to satisfy the designated second condition (e.g., if “No” in operation  509 ), the audio device (e.g., the processor  120  or  310 ) may terminate the process for role switching of the audio device  200 . According to an embodiment, when it determined that the designated second condition of the external audio device  210  fails to be satisfied, the processor  310  may determine that the role switching of the audio device  200  and the external audio device  210  is unnecessary. For example, when it is determined that the designated second condition of the external audio device  210  fails to be satisfied, the processor  310  may determine that that the noise is not concentrated in the audio device  200 , and thus the role switching of the external audio device  210  is unnecessary. 
     According to certain embodiments, when it is determined that the noise of the external audio device  210  meets the designated second condition (e.g., if “Yes” in operation  509 ), the audio device (e.g., the processor  120  or  310 ) may perform, in operation  511 , role switching with the external audio device  210 . According to an embodiment, when it is determined that the designated second condition of the external audio device  210  is satisfied, the processor  310  may determine that the role switching with the external audio device  210  is to be performed. For example, when it is determined that the designated second condition of the external audio device  210  is satisfied, the processor  310  may determine that the noise is concentrated in the audio device  200 , and thus audio data received using the microphone of the external audio device  210  (rather than the audio device  200 ) should be transmitted to the electronic device  220 . When it is determined that the audio data received using the microphone of the external audio device  210  is to be transmitted to the electronic device  220 , the processor  310  may perform role switching with the external audio device  210 . According to an embodiment, when it is determined the role switching with the external audio device  210  is to be performed, the processor  310  may configure a role switching time point. The processor  310  may control the communication circuit  330  to transmit a role switching request signal including the role switching time point to the external audio device  210 . When the role switching time point arrives, the processor  310  may switch the role of the audio device  200  from the primary device to a secondary device driven, based on a control of the external audio device  210  which is now configured as the primary device. According to an embodiment, when the role of the audio device  200  is switched to the secondary device, transmission of audio data to the electronic device  220  by the audio device  200  via the first communication link  231  may be restricted, with this operation being performed instead by the new primary device, the external audio device  210 . 
     According to certain embodiments, when the audio device  200  is configured as a primary device, the audio device  200  may transmit and/or receive audio data to or from the electronic device  220 . According to an embodiment, the processor  310  may control the audio module  320  to output the audio data received from the electronic device  220  to the outside through the speaker  324 , based on the information related to the first communication link  231  with the electronic device  220 . According to an embodiment, the processor  310  may control the communication circuit  330  to transmit audio data collected through the microphone  322  to the electronic device  220 , based on the information related to the first communication link  231  with the electronic device  220 . 
     According certain embodiments, when the audio device  200  is configured as a secondary device, based on the role switching with the external audio device  210 , the audio device  200  may monitor the first communication link  231 , based on the information related to the first communication link  231 . According to an embodiment, the processor  310  may acquire audio data transmitted via the first communication link  231  by the electronic device  220  through monitoring based on information related to the first communication link  231 . The processor  310  may control the audio module  320  to output the audio data acquired through the monitoring to the outside through the speaker  324 . According to an embodiment, when the audio device  200  is configured as a secondary device, based on the role switching with the external audio device  210 , the audio device  200  may control the communication circuit  330  not to collect the audio data through the microphone  322 , or not to transmit the audio data collected through the microphone  322  to the electronic device  220 . 
     According to certain embodiments, when it is determined that the noise detected from the audio device  200  through the microphone satisfies the designated first condition, the audio device  200  may determine, based on the noise of the audio device  200 , whether to transmit a noise level request signal. According to an embodiment, when a period for identification of the noise by the external audio device  210  arrives, the processor  310  may detect the intensity of the noise through the microphone  322 . For example, when the intensity (e.g., a noise level) of the noise detected through the microphone  322  satisfies the first reference level, the processor  310  may control the communication circuit  330  to transmit a noise level request signal to the external audio device  210 . In another example, when the intensity (e.g., a noise level) of the noise detected through the microphone  322  fails to satisfy the first reference level, the processor  310  may restrict transmission of the noise level request signal. 
       FIG. 6  illustrates an example of the intensity of noise measured in audio devices according to certain embodiments. 
     According to certain embodiments referring to  FIG. 6 , the audio device  200  and the external audio device  210  may be communicatively paired with the electronic device  220  while a call function is executed. According to an embodiment, when the audio device  200  is configured as a primary device, the audio device  200  may output audio data received based on information related to the first communication link  231  with the electronic device  220  from the electronic device  220  through the speaker  324 . The audio device  200  may transmit audio data collected through the microphone  322  to the electronic device  220 , based on the information related to the first communication link  231  with the electronic device  220 . According to an embodiment, when the external audio device  210  is configured as a secondary device, the external audio device  210  may detect audio data transmitted to the audio device  200  by the electronic device  220 , through monitoring of the first communication link  231 , based on the information related to the first communication link  231  with the electronic device  220 . The external audio device  210  may output the audio data detected through the monitoring, through a speaker. According to an embodiment, when the external audio device  210  is configured as a secondary device, the external audio device  210  may not collect the audio data through a microphone (e.g., the microphone  322 ), or may not transmit the audio data collected through the microphone to the electronic device  220 . 
     According to certain embodiments, the audio device  200  and the external audio device  210  may detect noise  600  and  610  at each designated period (e.g., a). According to an embodiment, the audio device  200  may detect noise  600  from audio data collected through the microphone  322 , at each designated period. According to an embodiment, the external audio device  210  may detect noise  610  from audio data collected through the microphone of the external audio device  210 , at each designated period. 
     According to certain embodiments, the audio device  200  may identify whether the intensity (e.g., a noise level) of the noise  600  detected through the microphone  322  continuously exceeds a first reference level  640  for a first time interval  620 , starting from a time point at which the intensity (e.g., a noise level) of the noise  600  detected through the microphone  322  first exceeds the first reference level  640 . For example, the first time interval  620  may include a designated time interval or a designated number of times. According to an embodiment, the first time interval  620  may change according to the intensity (e.g., a noise level) of the noise  600  detected through the microphone  322  or the state (e.g., a residual amount of a battery) of the audio device  200 . According to an embodiment, when the intensity of the noise  600  detected through the microphone  322  exceeds the first reference level  640  for the first time interval  620  periodically (for example, at a designated period (e.g., a)), the audio device  200  may transmit a noise level request signal to the external audio device  210 . According to certain embodiments, the audio device  200  may identify the noise  610  of the external audio device  210 , based on the noise level request signal. According to an embodiment, when the intensity (e.g., a noise level) of the noise  610  of the external audio device  210  is equal to or lower than a second reference level  650  ( 632 ), the audio device  200  may identify whether the intensity (e.g., a noise level) of the noise  610  of the external audio device  210  is continuously equal to or lower than the second reference level  650  for a second time interval  630 . For example, the second time interval  630  may include a designated time or a designated number of times. According to an embodiment, the second time interval  630  may be configured in the same manner as or a different manner from the first time interval  620 . For example, the second time interval  630  may change according to the intensity (e.g., a noise level) of the noise  610  detected through the microphone of the external audio device  210  or the state (e.g., a residual amount of a battery) of the external audio device  210 . According to an embodiment, when the intensity of the noise  610  detected from the external audio device  210  is equal to or lower than a second reference level  650  for the second time interval  630  periodically (for example, at a designated period (e.g., a)), the audio device  200  may determine to perform role switching with the external audio device  210 . 
     According to certain embodiments, when the noise  600  of the audio device  200  continuously exceeds the first reference level  640  for the first time interval  620  and the noise of the external audio device  210  is continuously equal to or lower than the second reference level  650  for the second time interval  630 , the audio device  200  may determine that the noise is concentrated in the direction of the audio device  200 . The audio device  200  may perform, based on the noise concentrated in the direction of the audio device  200 , role switching with the external audio device  210  so as to perform a call function by using the microphone of the external audio device  210 . 
     According to certain embodiments, when the noise of the external audio device  210  continuously exceeds the second reference level  650  for the second time interval  630 , the audio device  200  may determine not to perform role switching with the external audio device  210 . 
     According to certain embodiments, when the noise of the external audio device  210  exceeds the second reference level  650  at a specific time point within the second time interval  630 , the audio device  200  may determine not to perform role switching with the external audio device  210 . 
     According to certain embodiments, the external audio device  210  may detect the noise, based on a designated period from a time point of receiving a noise level request signal from the audio device  200 . According to certain embodiments, when the external audio device  210  is linked with the electronic device  220  and provides a call function, the external audio device  210  may detect the noise, based on a designated period. 
     According to certain embodiments, when the noise detected through the microphone  322  satisfies a first reference level for a first time interval, the audio device  200  may identify the intensity of the noise of the external audio device  210  to determine whether to perform role switching with the external audio device  210 . The audio device  200  may determine not to perform role switching, based on the noise detected through the microphone  322  in a state of identifying the intensity of the noise of the external audio device  210 . According to an embodiment, the audio device  200  may detect, while identifying the noise of the external audio device  210 , the noise through the microphone  322 , based on a designated period. For example, when the intensity of the noise detected through the microphone  322  satisfies a first reference level, the audio device  200  may determine whether to perform role switching with the external audio device  210 , based on the intensity of the noise of the external audio device  210 . In another example, when the intensity of the noise detected through the microphone  322  satisfies a third reference level, which is relatively lower than the first reference level, for a third time interval, the audio device  200  may determine not to perform role switching. For example, a state of satisfying the third reference level may include a state in which the intensity of the noise detected through the microphone  322  is equal to or lower than the third reference level. For example, a state satisfying the third reference level for the third time interval may include a state in which the intensity of the noise detected through the microphone  322  consecutively satisfies the third reference level by a designated number of times included in the third time interval. For example, the third time interval may be configured in the same manner as or a different manner from the second time interval, and may be configured based on the intensity of the noise acquired through the microphone  322  or the state (e.g., a residual amount of a battery) of the audio device  200 . For example, the third reference level corresponds to a reference level for determining, based on the intensity of the noise introduced through the microphone  322 , whether the microphone  322  can be used for a call function, and may be configured in the same manner as or a different manner from the second reference level. 
     According to certain embodiments, when the noise detected through the microphone  322  satisfies the first reference level  640  for the first time interval  620 , the audio device  200  may identify the intensity of the noise of the external audio device  210 , based on the information related to the noise received based on a designated period from the external audio device  210 . According to an embodiment, when the intensity of the noise of the external audio device  210  is lower than or equal to the intensity of the noise detected through the microphone  322 , the audio device  200  may identify whether the intensity of the noise of the external audio device  210  satisfies a second reference level. For example, when the intensity of the noise of the external audio device  210  satisfies the second reference level for a designated second time interval, the audio device  200  may determine to perform role switching with the external audio device  210 . In another example, when the intensity of the noise detected from the external audio device  210  fails to satisfy the second reference level before the designated second time interval expires, the audio device  200  may determine not perform role switching with the external audio device  210 . According to an embodiment, when the intensity of the noise of the external audio device  210  is higher than the intensity of the noise detected through the microphone  322 , the audio device  200  may determine not to perform role switching with the external audio device  210 . For example, the intensity of the noise detected through the microphone  322  may include at least one of the intensity of noise detected through the microphone at a time point (e.g., a designated period) that is identical or similar to a time point at which noise is detected from the external audio device  210 , an average of intensities of noise detected through the microphone  322  for a first time interval, or an average of intensities of noise detected through the microphone  322  for the first time interval and a second time interval. 
       FIG. 7  is a flow chart  700  illustrating determining, by an audio device, of whether to perform role switching, based on noise introduced into the audio device according to certain embodiments. According to an embodiment, operations of  FIG. 7  may be detailed operations of operation  507  of  FIG. 5 . Operations in the following embodiment may be sequentially performed, but are not mandatorily sequentially performed. For example, the sequences of the operations may be changed, and two or more operations may be performed in parallel. For example, the audio device of  FIG. 7  may be the electronic device  101  of  FIG. 1  or the audio device  200  of  FIG. 2  or  FIG. 3 . 
     According to certain embodiments referring to  FIG. 7 , in operation  701 , an audio device (e.g., the processor  120  of  FIG. 1  or the processor  310  of  FIG. 3 ) may identify whether noise of the audio device  200  satisfies a first reference level. According to an embodiment, the processor  310  may compare the intensity (e.g., a noise level) of noise detected based on a designated period through a microphone  322  with a first reference level. For example, when the intensity of the noise detected through the microphone  322  exceeds the first reference level, the processor  310  may determine that the noise of the audio device  200  satisfies the first reference level. In another example, when the intensity of the noise detected through the microphone  322  is equal to or lower than the first reference level, the processor  310  may determine that the noise of the audio device  200  fails to satisfy the first reference level. 
     According to certain embodiments, when the noise of the audio device  200  satisfies the first reference level (e.g., if “Yes” in operation  701 ), an audio device (e.g., the processor  120  or  310 ) may identify, in operation  703 , whether the noise of the audio device  200  satisfies the first reference level for a designated first time interval from a time point at which the noise first satisfies the first reference level. That is, the noise must meet or exceed the first reference level for a designated period of time. According to an embodiment, the processor  310  may identify whether the noise periodically detected from the audio device  200  consecutively satisfies the first reference level for a designated time or a first designated number of times. According to an embodiment, the first time interval may change according to the intensity (e.g., a noise level) of the noise detected through the microphone  322  or the state (e.g., a residual amount of a battery) of the audio device  200 . 
     According to certain embodiments, when the noise of the audio device  200  satisfies the designated first time interval (e.g., if “Yes” in operation  703 ), the audio device (e.g., the processor  120  or  310 ) may determine, in operation  705 , that the noise of the audio device  200  satisfies a first condition. According to an embodiment, when the intensity of the noise periodically detected through the microphone  322  satisfies the first reference level for the first time interval, the processor  310  may determine that a designated first condition is satisfied. According to an embodiment, when the noise periodically detected from the audio device  200  consecutively satisfies the first reference level for a designated first number of times, the processor  310  may determine that the designated first condition is satisfied. 
     According to certain embodiments, when the noise of the audio device  200  fails to satisfy the first reference level (e.g., if “No” in operation  701 ) or fails to satisfy the first reference level (e.g., if “No” in operation  703 ) within a designated time interval, the audio device (e.g., the processor  120  or  310 ) may determine in operation  707  that the noise of the audio device  200  fails to satisfy the designated first condition. According to an embodiment, when the intensity of the noise detected through the microphone  322  within the first time interval or before the first time interval is configured fails to satisfy the first reference level, the processor  310  may determine that the designated first condition fails to be satisfied. 
     According to certain embodiments, when the noise of the audio device  200  satisfies the designated first condition, the audio device  200  may transmit a noise level request signal to the external audio device  210  to determine whether the noise is concentrated in the direction in which the audio device  200  is worn. 
     According to certain embodiments, when the noise of the audio device  200  fails to satisfy the designated first condition, the audio device  200  may determine that a call function can be provided by using the microphone  322  of the audio device  200 . 
       FIG. 8  is a flow chart  800  illustrating determining, by an audio device, of whether to perform role switching, based on noise of another audio device according to certain embodiments. According to an embodiment, operations of  FIG. 8  may be detailed operations of operation  509  of  FIG. 5 . Operations in the following embodiment may be sequentially performed, but are not mandatorily sequentially performed. For example, the sequences of the operations may be changed, and two or more operations may be performed in parallel. For example, the audio device of  FIG. 8  may be the electronic device  101  of  FIG. 1  or the audio device  200  of  FIG. 2  or  FIG. 3 . 
     According to certain embodiments referring to  FIG. 8 , in operation  801 , an audio device (e.g., the processor  120  of  FIG. 1  or the processor  310  of  FIG. 3 ) may transmit a noise level request signal to an external audio device  210 , i.e., when noise of the audio device  200  satisfies a designated first condition (e.g., “Yes” in operation  507  of  FIG. 5 ; and “Yes” in operations  701 - 703  of  FIG. 7 ). 
     According to certain embodiments, in operation  803 , the audio device (e.g., the processor  120  or  310 ) may receive information related to noise of the external audio device  210  from the external audio device  210  in response to the noise level request signal. According to an embodiment, when noise detected through the microphone  322  satisfies the designated first condition, the processor  310  may control the communication circuit  330  to transmit the noise level request signal to the external audio device  210 , based on a period for identification of the noise by the external audio device  210 . The processor  310  may receive the information related to the noise from the external audio device  210  in response to the noise level request signal. According to an embodiment, when the noise detected through the microphone  322  satisfies the designated first condition, the processor  310  may control the communication circuit  330  to transmit the noise level request signal to the external audio device  210 . The processor  310  may periodically receive the information related to the noise, from the external audio device  210  through the communication circuit  330  in response to the noise level request signal. For example, the information related to the noise may include at least one of the intensity (e.g., a noise level) of the noise detected from the external audio device  210  or information related to a result of comparison between a second reference level and the intensity of the noise detected from the external audio device  210 . 
     According to certain embodiments, in operation  805 , the audio device (e.g., the processor  120  or  310 ) may identify whether the noise of the external audio device  210  meets the second reference level. According to an embodiment, the processor  310  may compare the intensity (e.g., a noise level) of the noise detected the external audio device  210  with the second reference level. For example, when the intensity of the noise detected from the external audio device  210  is equal to or lower than the second reference level, the processor  310  may determine that the noise of the external audio device  210  satisfies the second reference level. In another example, when the intensity of the noise detected from the external audio device  210  exceeds the second reference level, the processor  310  may determine that the noise of the external audio device  210  fails to satisfy the second reference level. 
     According to certain embodiments, when the noise of the external audio device  210  satisfies the second reference level (e.g., if “Yes” in operation  805 ), the audio device (e.g., the processor  120  or  310 ) may identify, in operation  807 , whether the noise of the external audio device  210  satisfies the second reference level for a designated second time interval from a time point at which the noise of the external audio device  210  first satisfies the second reference level. According to an embodiment, the processor  310  may identify whether the noise periodically detected from the external audio device  210  consecutively satisfies the second reference level for a designated time interval or by a designated second number of times. For example, the second time interval  630  may change according to the intensity (e.g., a noise level) of the noise  610  detected through the microphone of the external audio device  210  or the state (e.g., a residual amount of a battery) of the external audio device  210 . 
     According to certain embodiments, when the noise of the external audio device  210  satisfies the second reference level for a designated second time interval (e.g., if “Yes” in operation  807 ), the audio device (e.g., the processor  120  or  310 ) may determine, in operation  809 , that the noise of the external audio device  210  satisfies the designated second condition. According to an embodiment, when the intensity of the noise detected through the microphone of the external audio device  210  continuously satisfies the second reference level for the second time interval, the processor  310  may determine that the designated second condition is satisfied. According to an embodiment, when the noise periodically detected from the external audio device  210  consecutively satisfies the second reference level for a designated time interval or by a designated second number of times, the processor  310  may determine that the designated second condition is satisfied. 
     According to certain embodiments, when the noise of the external audio device  210  fails to satisfy the second reference level (e.g., if “No” in operation  805 ) or the noise of the external audio device  210  fails to satisfy the second reference level within the designated second time interval (e.g., if “No” in operation  807 ), the audio device (e.g., the processor  120  or  310 ) may determine, in operation  811 , that the noise of the external audio device  210  fails to satisfy the designated second condition. According to an embodiment, when the intensity of the noise detected through the microphone of the external audio device  210  fails to satisfy the second reference level within the second time interval or before the second time interval is configured, the processor  310  may determine that the designated second condition fails to be satisfied. 
     According to certain embodiments, when the noise of the external audio device  210  satisfies the designated second condition, the audio device  200  may determine that the noise is concentrated in the direction in which the audio device  200  is worn. The audio device  200  may perform role switching with the external audio device  210  in order to use the microphone of the external audio device  210  for a call function. 
     According to certain embodiments, when the noise of the external audio device  210  fails to satisfy the designated second condition, the audio device  200  may determine that the noise is not concentrated in the direction in which the audio device  200  is worn. For example, when the noise of the external audio device  210  fails to satisfy the designated second condition, the audio device  200  may determine that the role switching with the external audio device  210  is unnecessary. 
       FIG. 9A  illustrates an example of identifying noise of another audio device by an audio device according to certain embodiments. 
     According to certain embodiments referring to  FIG. 9A , when noise satisfying a first reference level for a first time interval is detected from the audio device  200  ( 920 ), the audio device  200  may periodically identify information related to the noise of the external audio device  210 . According to an embodiment, when it is determined based on the noise of the audio device  200  that a designated first condition is satisfied, the audio device  200  may transmit a noise level request signal to the external audio device  210  ( 922 ). When a period (e.g., T 0 +nα) for identification of noise by the external audio device  210  arrives, the external audio device  210  may transmit information related to the noise detected through the microphone of the external audio device  210  to the audio device  200  in response to the noise level request signal ( 924 ). For example, the audio device  200  may periodically transmit the noise level request signal to the external audio device  210  ( 922 ,  926 , and  930 ). The external audio device  210  may periodically transmit the information related to the noise of the external audio device  210  to the audio device  200  in response to the noise level request signal ( 924 ,  928 , and  932 ). 
       FIG. 9B  illustrates another example of identifying noise of another audio device by an audio device according to certain embodiments. 
     According to certain embodiments referring to  FIG. 9B , when noise satisfying a first reference level for a first time interval is detected from the audio device  200  ( 920 ), the audio device  200  may periodically identify information related to the noise of the external audio device  210 . According to an embodiment, when it is determined based on the noise of the audio device  200  that a designated first condition is satisfied, the audio device  200  may transmit a noise level request signal to the external audio device  210  ( 922 ). The external audio device  210  may periodically transmit the information related to the noise of the external audio device  210  to the audio device  200  in response to the noise level request signal ( 924 ,  928 , and  932 ). According to an embodiment, when a noise level of the external audio device  210  fails to satisfy a second condition (e.g., does not correspond to a second reference level or lower), the external audio device  210  may not transmit a response to the audio device  200 . For example, when no response to the noise level request signal is received from the external audio device  210 , the audio device  200  may determine that the external audio device  210  fails to satisfy a second condition. 
     According to certain embodiments, the external audio device  210  may transmit information related to noise detected based on a designated period through a microphone of the external audio device  210 , to the audio device  200 . According to an embodiment, when the designated period arrives, the external audio device  210  may transmit information on the noise detected (e.g., a noise level) through the microphone of the external audio device  210 , to the audio device  200 . According to an embodiment, the external audio device  210  may transmit a result of comparison between the second reference level and the noise detected through the microphone of the external audio device  210 , to the audio device  200 . 
     According to an embodiment, when the noise of the external audio device  210  satisfies, based on the noise information received from the external audio device  210 , the second reference level for the second time interval, the audio device  200  may identify the intensity of the noise detected through the microphone  322  of the audio device  200 . When the intensity (e.g., a noise level) of the noise detected through the microphone  322  satisfies the first reference level for the first time interval, the audio device  200  may determine to perform role switching with the external audio device  210 . 
       FIG. 10  is a flow chart  1000  illustrating transmission of a noise level request signal by an audio device according to certain embodiments. According to certain embodiments, operations of  FIG. 10  may be detailed operations of operation  807  of  FIG. 8 . Operations in the following embodiment may be sequentially performed, but are not mandatorily sequentially performed. For example, the sequences of the operations may be changed, and two or more operations may be performed in parallel. For example, the audio device of  FIG. 10  may be the electronic device  101  of  FIG. 1  or the audio device  200  of  FIG. 2  or  FIG. 3 . 
     According to certain embodiments referring to  FIG. 10 , when noise of the external audio device  210  satisfies a second reference level (e.g., if “Yes” in operation  805  of  FIG. 8 ), an audio device (e.g., the processor  120  of  FIG. 1  or the processor  310  of  FIG. 3 ) may identify noise of the audio device  200  in operation  1001 . According to an embodiment, when a transmission time point of a noise level request signal arrives, the processor  310  may detect noise through the microphone  322 . For example, the transmission time point of the noise level request signal may be configured based on a period for identification of noise by the external audio device  210 . 
     According to certain embodiments, the audio device (e.g., the processor  120  or  310 ) may identify, in operation  1003 , whether the noise of the audio device  200  satisfies a first reference level. According to an embodiment, when the intensity of the noise detected from the audio device  200  through the microphone  322  exceeds the first reference level, the processor  310  may determine that the noise of the audio device  200  satisfies the first reference level. According to an embodiment, when the intensity of the noise detected from the audio device  200  through the microphone  322  is equal to or lower than the first reference level, the processor  310  may determine that the noise of the audio device  200  fails to satisfy the first reference level. 
     According to certain embodiments, when it is determined that the noise of the audio device  200  satisfies the first reference level (e.g., if “Yes” in operation  1003 ), the audio device (e.g., the processor  120  or  310 ) may transmit, in operation  1005 , a noise level request signal to the external audio device  210 . According to an embodiment, when the noise of the audio device  200  satisfies the first reference level, the processor  310  may determine that it is difficult to provide a call function using the microphone  322  of the audio device  200 . Accordingly, the processor  310  may control the communication circuit  330  to transmit the noise level request signal to the external audio device  210 . 
     According to certain embodiments, when it is determined that the noise of the audio device  200  fails to satisfy the first reference level (e.g., if “No” in operation  1003 ), the audio device (e.g., the processor  120  or  310 ) may identify noise of the audio device  200  in operation  1001 . According to an embodiment, when the noise of the audio device  200  fails to satisfy the first reference level, the processor  310  may determine that a call function can be provided using the microphone  322  of the audio device  200 . Accordingly, the processor  310  may stop transmitting the noise level request signal. According to an embodiment, when it is determined that the call function can be provided using the microphone  322  of the audio device  200 , an operation (e.g., operation  701  of  FIG. 7 ) of determining whether the noise of the microphone  322  of the audio device  200  satisfies the first reference level may be performed. 
     According to certain embodiments, when a transmission time point of the noise level request signal arrives, the audio device  200  may determine, based on the noise of the audio device  200 , whether to transmit the noise level request signal. 
       FIG. 11  is a flow chart  1100  illustrating identification of noise of another audio device by an audio device according to certain embodiments. According to an embodiment, operations of  FIG. 11  may be detailed operations of operation  805  of  FIG. 8 . Operations in the following embodiment may be sequentially performed, but are not mandatorily sequentially performed. For example, the sequences of the operations may be changed, and two or more operations may be performed in parallel. For example, the audio device of  FIG. 11  may be the electronic device  101  of  FIG. 1  or the audio device  200  of  FIG. 2  or  FIG. 3 . 
     According to certain embodiments referring to  FIG. 11 , when information related to noise is received from the external audio device  210  (e.g., operation  803  of  FIG. 8 ), an audio device (e.g., the processor  120  of  FIG. 1  or the processor  310  of  FIG. 3 ) may identify noise of the external audio device  210  in operation  1101 . For example, the intensity of the noise of the external audio device  210  may include the intensity (e.g., a noise level) of noise detected based on a designated period through a microphone of the external audio device  210 . 
     According to certain embodiments, in operation  1103 , the audio device (e.g., the processor  120  or  310 ) may identify whether the intensity of the noise of the external audio device  210  is lower than the intensity of the noise of the audio device  200 . According to an embodiment, the processor  310  may detect, based on a designated period, the noise of the audio device  200  through the microphone  322 . The processor  310  may compare the intensity of the noise of the external audio device  210  with the intensity of the noise of the audio device  200  detected at a time point closest from a time point at which the noise of the external audio device  210  is detected, among periodically detected noise of the audio device  200 . For example, the audio device (e.g., the processor  120  or  310 ) may identify, based on the intensity of the noise detected from the audio device  200  at a time point at which the intensity of the noise of the external audio device  210  is received or before or after a time point at which the noise of the external audio device  210  is received, whether the noise of the external audio device  210  is lower than the noise of the audio device  200 . 
     According to certain embodiments, when the intensity of the noise of the external audio device  210  is lower than the intensity of the noise of the audio device  200  (e.g., if “Yes” in operation  1103 ), the audio device (e.g., the processor  120  or  310 ) may identify, in operation  1105 , whether the intensity of the noise of the external audio device  210  is lower than the second reference level. According to an embodiment, when the intensity of the noise of the external audio device  210  is lower than the intensity of the noise of the audio device  200 , the processor  310  may determine that the quality of audio data collected through the microphone of the external audio device  210  is relatively better than that of audio data collected through the microphone  322  of the audio device  200 . The processor  310  may compare a second reference level with the intensity (e.g., a noise level) of the noise detected from the external audio device  210  to determine whether a call function can be provided using the microphone of the external audio device  210 . 
     According to certain embodiments, when the intensity of the noise of the external audio device  210  is lower than the second reference level (e.g., if “Yes” in operation  1105 ), the audio device (e.g., the processor  120  or  310 ) may determine, in operation  1107 , that the noise of the external audio device  210  satisfies the second reference level. According to an embodiment, when it is determined that the noise of the external audio device  210  satisfies the second reference level, the processor  310  may identify whether the noise of the external audio device  210  satisfies the second reference level for a designated second time interval (e.g., operations  807  to  809  in  FIG. 8 ). 
     According to certain embodiments, when the intensity of the noise of the external audio device  210  is equal to or higher than the intensity of the noise of the audio device  200  (e.g., if “No” in operation  1103 ), or when the noise of the external audio device  210  is equal to or higher than the second reference level (e.g., if “No” in operation  1105 ), the audio device (e.g., the processor  120  or  310 ) may determine, in operation  1109 , that the noise of the external audio device  210  fails to satisfy the second reference level. According to an embodiment, when it is determined that the noise of the external audio device  210  fails to satisfy the second reference level, the processor  310  may determine that the noise is not concentrated in the audio device  200 . The processor  310  may determine that role switching with the external audio device  210  for a communication function is not necessary. 
     According to certain embodiments, the audio device  200  may identify whether the intensity of the noise of the external audio device  210  is lower than the second reference level. According to an embodiment, when the intensity of the noise of the external audio device  210  is lower than the second reference level, the audio device  200  may identify whether the intensity of the noise of the external audio device  210  is lower than the intensity of the noise of the audio device  200 . When the intensity of the noise of the external audio device  210  is lower than the intensity of the noise of the audio device  200 , the audio device  200  may determine that the noise of the external audio device  210  satisfies the second reference level. According to an embodiment, when the intensity of the noise of the external audio device  210  is equal to or higher than the second reference level, or when the intensity of the noise of the external audio device  210  is equal to or higher than the intensity of the noise of the audio device  200 , the audio device  200  may determine that the noise of the external audio device  210  fails to satisfy the second reference level. 
       FIG. 12  is a flow chart  1200  illustrating role switching in an audio device according to certain embodiments. According to certain embodiments, operations of  FIG. 12  may be detailed operations of operation  511  of  FIG. 5 . Operations in the following embodiment may be sequentially performed, but are not mandatorily sequentially performed. For example, the sequences of the operations may be changed, and two or more operations may be performed in parallel. For example, the audio device of  FIG. 12  may be the electronic device  101  of  FIG. 1  or the audio device  200  of  FIG. 2  or  FIG. 3 . 
     According to certain embodiments referring to  FIG. 12 , when the audio device (e.g., the processor  120  of  FIG. 1  or the processor  310  of  FIG. 3 ) determines to perform role switching with the external audio device  210 , the audio device may configure a role switch time point in operation  1201 . According to an embodiment, when the noise detected from the audio device  200  through the microphone  322  satisfies a designated first condition and the noise of the external audio device  210  satisfies a designated second condition, the processor  310  may determine to perform role switching with the external audio device  210  for a communication function. According to an embodiment, when the role switching with the external audio device  210  is determined to be executed, the processor  310  may configure a role switch time point based on an operation frequency (e.g., clock) of the audio device  200 . 
     According to certain embodiments, the audio device (e.g., the processor  120  or  310 ) may transmit a role switch request signal including information related to the role switch time point to the external audio device  210  in operation  1203 . According to an embodiment, the processor  310  may control the communication circuit  330  to transmit the role switch request signal through the second communication link with the external audio device  210 . 
     According to certain embodiments, the audio device (e.g., the processor  120  or  310 ) may identify, in operation  1205 , when the role switch time point arrives. 
     According to certain embodiments, when the role switch time point does not arrive (e.g., if “No” in operation  1205 ), the audio device (e.g., the processor  120  or  310 ) may continue to monitor, in operation  1205 , whether the role switch time point has arrived. 
     According to certain embodiments, when the role switch time point arrives (e.g., if “Yes” in operation  1205 ), the audio device (e.g., the processor  120  or  310 ) may execute role switching with the external audio device  210  in operation  1207 . According to an embodiment, the processor  310  may switch the role of the audio device  200  to a secondary device, based on control via the external audio device  210  now set as the primary device. 
     According to certain embodiments, when the role of the audio device  200  is switched from that of the external audio device  210 , the audio device  200  may identify whether role switching is to be periodically performed. For example, the audio device  200  may periodically identify the intensity of the noise received through the microphone  322  of the audio device  200 , and request role switching from the external audio device  210  when the intensity of the received noise is equal to or lower than a sixth reference level (e.g., identical to or lower than the second reference level). 
     According to certain embodiments, when the role of the external audio device  210  is switched from that of the audio device  200 , the external audio device  210  may identify whether role switching is to be periodically performed. For example, the external audio device  210  may perform operations in  FIG. 7  to perform an operation of identifying whether the noise of the external audio device  210  satisfies the first reference level and identify whether role switching with the audio device  200  is desired. 
     According to certain embodiments, the audio device  200  may switch the role to the secondary device after transmitting the role switch request signal to the external audio device  210 . When receiving the role switch request signal from the audio device  210 , the external audio device  210  may switch the role to the primary device. 
     According to certain embodiments, an operation method of an audio device (e.g., the electronic device  101  of  FIG. 1  or the audio device  200  of  FIG. 2  or  FIG. 3 ) may include establishing a communication link (e.g., the first communication link  231  of  FIG. 2 ) with an electronic device (e.g., the electronic device  220  of  FIG. 2 ), transmitting information related to the communication link to an external audio device (e.g., the external audio device  210  of  FIG. 2 ), detecting noise of the audio signal, identifying noise of the external audio device when the noise of the audio device satisfies a designated first condition, and controlling the external audio device to transmit audio data to the electronic device when the noise of the external audio device satisfies a designated second condition that is different from the designated first condition. 
     According to certain embodiments, the method may further include outputting the audio data received from the electronic device to the outside through a speaker of the audio device when a role for communication with the electronic device is configured as a primary device, and transmitting the audio data collected through a microphone of the audio device to the electronic device via the communication link. 
     According to certain embodiments, the method may further include identifying whether the noise of the audio device satisfies a first reference level for a designated first time interval when the noise of the audio device, detected based on a designated period, satisfies the first reference level, and determining that the designated first condition is satisfied when the noise of the audio device continuously satisfies the first reference level for the designated first time interval. 
     According to certain embodiments, the first time interval may be configured based on a battery state of the audio device and the noise detected through at least one microphone. 
     According to certain embodiments, the identifying of the noise of the external audio device may include periodically transmitting a noise level request signal to the external audio device, based on a noise detection period of the external audio device when the noise of the audio device satisfies the designated first condition, and receiving information related to the noise from the external audio device in response to the noise level request signal. 
     According to certain embodiments, the identifying of the noise of the external audio device may include transmitting a noise level request signal to the external audio device when the noise of the audio device satisfies the designated first condition, and periodically receiving information related to noise of the external audio device from the external audio device. 
     According to certain embodiments, the method may further include identifying whether the noise of the external audio device satisfies a second reference level for a designated second time interval when the noise of the external audio device satisfies the second reference level, and determining that the designated second condition is satisfied when the noise of the external audio device continuously satisfies the second reference level for the designated second time interval. 
     According to certain embodiments, the second time interval corresponds to a time interval which is different from or at least partially overlaps a first time interval included in the first designated condition, and may be configured based on a battery state of the external audio device and the noise of the external audio device. 
     According to certain embodiments, the controlling of the external audio device may include configuring a role switch time point when the noise of the external audio device satisfies the designated second condition, transmitting a role switch request signal including information related to the role switch time point to the external audio device, and switching, based on the role switch time point, a role for communication with the electronic device to a secondary device, in which transmission of audio data to the electronic device by the audio device is restricted based on the role switching, and the external audio device transmits the audio data to the electronic device, based on the role switching. 
     Certain embodiments disclosed in this specification and the drawings are merely specific examples presented in order to easily describe technical details according to an embodiment of the discourse and to help the understanding of an embodiment of the disclosure, and are not intended to limit the scope of an embodiment of the disclosure. Therefore, all changes or modifications derived from the technical idea of certain embodiments of the disclosure as well as certain embodiments disclosed herein should be construed to fall within the scope of certain embodiments of the disclosure.