Patent Publication Number: US-11039238-B2

Title: Wireless earbud charging and communication systems and methods

Description:
CROSS-REFERENCE TO RELATED APPLICATIONS 
     This application is the national stage filing of International Patent Application No. PCT/US17/33681 with an international filing date of May 19, 2017, which claims priority to U.S. patent application Ser. No. 15/340,133, entitled “Wireless Earbud Charging and Communication Systems and Methods,” filed Nov. 1, 2016 (now U.S. Pat. No. 9,906,851 issued Feb. 27, 2018), and the benefit of U.S. Provisional Patent Appl. No. Ser. 62/339,443 filed May 20, 2016, the disclosure of both of which is herein incorporated by reference in its entirety. 
    
    
     INCORPORATION BY REFERENCE 
     All publications and patent applications mentioned in this specification are herein incorporated by reference in their entirety, as if each individual publication or patent application was specifically and individually indicated to be incorporated by reference in its entirety. 
     FIELD OF THE INVENTION 
     This invention relates generally to the field of the Internet of Things, and more specifically to wireless earbud charging and communication systems and methods. 
     BACKGROUND OF THE INVENTION 
     Currently, there are a number of headset or earbud configurations available which allows a user to listen to audio streaming from his cellular device. For example, the headset may comprise two earbuds tethered together and optionally tethered to the cellular device or a completely wireless configuration. However, each of these configurations has deficiencies rendering its use less than ideal. For example, the cord that links the two earbuds together and/or links the earbuds to the cellular device often becomes tangled on clothing, hair, or other accessories potentially dislodging one or both earbuds from their position in the user&#39;s ear. The cord that links the two earbuds together and/or links the earbuds to the cellular device may restrict movement of the user as the user needs to avoid pulling the cord during use of the system (e.g., exercise, dancing, running, working, etc.). 
     Further, the communication methods used by available wireless earbuds are also less than ideal. Currently, a first earbud receives a packet of information with a time stamp and then transmits that same packet of information to a second earbud (i.e., a master-slave configuration, as shown in  FIG. 17A ). Once the time indicated in the time stamp occurs, the audio that was delivered to the first and second earbuds in the packet is played. However, currently available wireless earbuds have two inherent disadvantages with this approach. First, if the time indicated on the time stamp passes and both earbuds do not have the packet containing the audio, then the earbuds do not play the audio, resulting in the first issue: poor signal reception. Second, to decrease poor signal reception (i.e., drop-outs), the time between packet transmission (e.g., by computing device, mobile computing device, case, etc.) to an earbud, packet receipt by the earbud, and time stamp elapse at the earbud is increased (i.e., improve the chances of both earbuds receiving the packet without the time indicated in the time stamp occurring or passing), resulting in the second issue: latency between visual and audio experiences (e.g., lip movement in video does not align with audio). Further, current completely wireless earbuds have a master-slave configuration in which the first earbud needs to receive the packet first and then retransmit the packet to the second earbud, the second earbud receiving the retransmitted packet. This master-slave configuration increases the time required to transmit data or audio to both earbuds increasing the likelihood of poor signal reception (i.e., dropouts). The shadow created by the user&#39;s head for the second earbud only exacerbates these disadvantages since the wireless signal does not readily penetrate the skull of the user. Occasionally, environments that provide adequate surfaces for wireless signal reflection and/or that decrease wireless signal dispersion (e.g., more wireless signal reaches intended destination) decrease dropouts and/or the need for latency, but once the user moves outdoors or into a more open space, the latency and poor signal reception problems return. 
     The poor signal reception and latency issues can be inversely proportional: if latency is increased, audio-visual synchronization is decreased (i.e., fewer dropouts, but audio lagging behind video playback), but if latency is decreased to synchronize audio and video, dropout frequency increases. Thus, a manufacturer is forced to choose which is more important to the user base as a whole: audio-visual synchronization or signal (e.g., audio, data, information, etc.) reception quality (i.e., fewer dropouts). 
     Further, when using wireless earbuds, it is difficult for a user to continually track the location of their earbuds and provide the earbuds with the re-charge needed after only a few hours of use. However, current cases that allow storage of the earbuds in the case are bulky and difficult to use. For example, if the earbuds are stored near the bottom of the case, the case includes a bulge or widening to accommodate the earbuds which results in difficult one-handed manipulation of the mobile computing device positioned in the case. For example, housing the earbuds at the bottom of the case makes it harder for a user&#39;s finger or thumb to reach all the rectangular surface area of the cellular device&#39;s touch screen, especially along the top edge. Further, for example, current cases that allow storage of the earbuds in a top portion of the case, to avoid the issues described above, usually include a widening or bulge to accommodate the earbuds and/or include an overall increased case thickness, resulting in the case being difficult to use and store in a user&#39;s pocket. 
     Mobile computing devices are repeatedly being redesigned to be lighter, thinner, and increasingly portable. To protect these lighter and thinner mobile computing devices, users&#39; desire cases that protect their mobile computing device and house their earbuds but that do not result in increased bulkiness to the overall slim design of the mobile computing device. 
     Thus, there is a need for new and useful wireless earbud charging and communication systems and methods. This invention provides such new and useful systems and methods. 
     SUMMARY 
     One aspect of the present disclosure is directed to a case for storing a mobile computing device and a wireless earbud. In some embodiments, the case includes a back panel, a front panel defining a viewing aperture which extends through the front panel, a plurality of sidewalls extending from the back panel and configured to couple a first portion of the back panel to a front panel portion, a dividing layer between the front panel and the back panel, and a wireless earbud charging contact disposed within the second housing and configured to contact and charge the wireless earbud when the wireless earbud is positioned in the case. In some embodiments, one or more of the back panel, the front panel, and a subset of the plurality of sidewalls is configured to receive a wireless earbud. In some embodiments, the front panel and the dividing layer together define a first housing configured to receive and restrain a mobile computing device, and the dividing layer and the back panel together define a second housing. 
     In some embodiments, the case further includes a rechargeable battery disposed in the second housing, such that the wireless earbud charging contact is positioned adjacent to the rechargeable battery. In some embodiments, the rechargeable battery charges the mobile computing device when the mobile computing device is positioned in the case. Additionally or alternatively, in some embodiments, the rechargeable battery charges the first and second wireless earbuds when positioned in the case. 
     In some embodiments, the subset of the plurality of sidewalls define an earbud cavity configured to receive the wireless earbud. In other embodiments, the back panel, the second portion of the front panel, and the subset of the plurality of sidewalls define an earbud cavity configured to receive the wireless earbud. In some embodiments, the earbud cavity is positioned adjacent to the first housing and the second housing. In some embodiments, the earbud cavity is parallel to the front panel and the back panel. 
     In some embodiments, a combined thickness of the second housing and the back panel does not exceed 6 mm. 
     In some embodiments, a first portion of the front panel is parallel to the back panel and a second portion of the front panel includes a groove to accommodate the wireless earbud. 
     Another aspect of the present disclosure is directed to a case for storing a mobile computing device and wireless earbuds. In some embodiments, the case includes a back panel, a front panel defining a viewing aperture which extends through the front panel, a plurality of sidewalls extending from the back panel and configured to couple a first portion of the back panel to a front panel portion, a dividing layer between the front panel and back panel, and an earbud locking mechanism configured to removably secure the first wireless earbud and the second wireless earbud in the case. In some embodiments, the front panel and the dividing layer together define a first housing for receiving and restraining a mobile computing device. 
     In some embodiments, one or more of the back panel, the front panel, and a subset of the plurality of sidewalls is configured to receive a first wireless earbud and a second wireless earbud. In some such embodiments, the earbud locking mechanism is adjacent to the first housing and adjacent to the first and second wireless earbuds when the first and second wireless earbuds are positioned in the case. In some embodiments, the earbud locking mechanism functions to removably secure the first and second wireless earbuds in the earbud cavity. 
     In one embodiment, the earbud locking mechanism includes a stationary lock for the first wireless earbud and a sliding lock for the second wireless earbud. In another embodiment, the earbud locking mechanism includes a first sliding lock for the first wireless earbud and a second sliding lock for the second wireless earbud. In a further embodiment, the earbud locking mechanism includes a first stationary lock for the first wireless earbud and a second stationary lock for the second wireless earbud. 
     In some embodiments, the subset of the plurality of sidewalls define an earbud cavity in a top portion of the case. In some embodiments, the earbud cavity is adjacent to the first housing, the dividing layer, and the second housing. 
     In some embodiments, the back panel and the dividing layer together define a second housing for receiving an electrical component. In some such embodiments, the electrical component includes one or more of: a rechargeable battery, a printed circuit board, an earbud charging contact, and an antenna. 
     In some embodiments, the case further includes the first and second wireless earbuds. In some such embodiments, the first and second wireless earbuds each include a depression configured to engage the earbud locking mechanism. 
     Another aspect of the present disclosure is directed to a case for storing a mobile computing device and wireless earbuds. In some embodiments, the case includes a back panel, a front panel defining a viewing aperture which extends through the front panel, a plurality of sidewalls extending from the back panel and configured to couple a first portion of the back panel to a front panel portion, and a dividing layer between the front panel and the back panel. In some embodiments, the front panel and the dividing layer together define a first housing for receiving and restraining the mobile computing device. In some embodiments, a subset of the plurality of sidewalls define an earbud cavity configured to receive a first wireless earbud and a second wireless earbud. For example, in some embodiments, the earbud cavity is positioned in a top portion of the case opposite a bottom portion. 
     In some embodiments, the top portion and the bottom portion of the case are transitionable between a coupled state and a decoupled state, such that, in the coupled state, the mobile computing device is restrained in the case. 
     In some embodiments, the subset of the plurality of sidewalls define a top edge of the case, such that the top edge is perpendicular to the front panel, the dividing layer, and the bottom panel. 
     In some embodiments, the back panel is planar. In some embodiments, the back panel and the dividing layer together define a second housing, such that at least a portion of the first and second wireless earbuds extends into the second housing when the first and second wireless earbuds are positioned in the earbud cavity. 
     In some embodiments, a front surface portion and a back surface portion of each of the first and second wireless earbuds are exposed for pinch removal of the first and second wireless earbuds from the earbud cavity. 
     In some embodiments, the earbud cavity is configured to charge one or more of the first wireless earbud and the second wireless earbud when the first and second wireless earbuds are positioned in the earbud cavity. 
     Another aspect of the present disclosure is directed to a case for storing a mobile computing device and wireless earbuds. In some embodiments, the case includes a back panel, a front panel defining a viewing aperture which extends through the front panel, a plurality of sidewalls extending from the back panel and configured to couple a first portion of the back panel to a front panel portion, and a dividing layer between the front panel and the back panel. In some embodiments, the front panel and the dividing layer together define a housing for receiving and restraining the mobile computing device. In some embodiments, a subset of the plurality of sidewalls define a top edge of the case, such that the top edge is configured to receive a first wireless earbud and a second wireless earbud. 
     In some embodiments, the dimensions of the case do not exceed a thickness of 17.5 mm, a width of 75 mm, and a length of 164 mm. 
     In some embodiments, the front panel and back panel are transitionable between a coupled state and a decoupled state, such that the mobile computing device is restrained in the case in the coupled state. 
     In some embodiments, the top edge is opposite a bottom portion of the case, such that the bottom portion comprises a connector configured to electrically couple the case to the mobile computing device. 
     Another aspect of the present disclosure is directed to a system for wirelessly transmitting audio directly to a first wireless earbud and a second wireless earbud. In some embodiments, the system includes the first and second wireless earbuds; and a case including: a back panel, a plurality of sidewalls extending around the back panel and defining a housing configured for receiving a mobile computing device, a receiver configured for receiving a wireless data transfer from the mobile computing device, and a transmitter configured for transmitting a plurality of wireless data transfers directly to at least the first and second wireless earbuds. 
     In some embodiments, the case further includes a rechargeable battery disposed therein. In some embodiments, the rechargeable battery charges the mobile computing device when the mobile computing device is positioned in the case. Alternatively or additionally, in some embodiments, the rechargeable battery charges the first and second wireless earbuds when positioned in the top portion of the case. 
     In some embodiments, the receiver is a transceiver. In some embodiments, the transmitter is a transceiver. 
     In some embodiments, the first wireless earbud receives the plurality of wireless data transfers at a first frequency and the second wireless earbud receives the plurality of wireless data transfers at a second frequency 
     Another aspect of the present disclosure is directed to a system for wirelessly transmitting data directly to a first wireless earbud and a second wireless earbud. In some embodiments, the system includes the first and second wireless earbuds communicatively coupled to a mobile computing device; and a case including: a back panel, a plurality of sidewalls extending around the back panel and defining a housing configured for receiving the mobile computing device, a top portion adjacent to the back panel, and a rechargeable battery disposed in the base panel, such that the rechargeable battery charges the first and second wireless earbuds when positioned in the top portion. In some embodiments, a plurality of wireless data transfers occurs directly between the mobile computing device and the first wireless earbud and the mobile computing device and the second wireless earbud. In some embodiments, the back panel contacts a back surface of the mobile computing device. In some embodiments, the top portion comprises an aperture configured to receive the first and second wireless earbuds. 
     In some embodiments, the wirelessly transmitted data comprises audio. 
     In some embodiments, the rechargeable battery charges the mobile computing device when the mobile computing device is positioned in the case. 
     In some embodiments, the first wireless earbud receives the plurality of wireless data transfers at a first frequency and the second wireless earbud receives the plurality of wireless data transfers at a second frequency. In some embodiments, the plurality of wireless data transfers occurs bidirectionally. In other embodiments, the plurality of wireless data transfers does not occur between the first and second wireless earbuds. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1A  shows a front view of one embodiment of a case. 
         FIG. 1B  shows a bottom perspective view of one embodiment of a case. 
         FIG. 1C  shows a side perspective view of one embodiment of a case with a discontinuous viewing aperture perimeter. 
         FIG. 1D  shows a side view of one embodiment of a case housing at least one earbud. 
         FIG. 1E  shows a side view of one embodiment of a case housing at least one earbud. 
         FIG. 2A  shows a front view of one embodiment of a wireless earbud with a truncated fin and tip portion. 
         FIG. 2B  shows a back view of one embodiment of a wireless earbud with a truncated fin and tip portion. 
         FIG. 2C  shows a front view of one embodiment of a wireless earbud with an intermediate length fin and tip portion. 
         FIG. 2D  shows a back view of one embodiment of a wireless earbud with an intermediate length fin and tip portion. 
         FIG. 2E  shows a front view of one embodiment of a wireless earbud with an elongated fin and tip portion. 
         FIG. 2F  shows a back view of one embodiment of a wireless earbud with an elongated fin and tip portion. 
         FIG. 3A  shows a front view of one embodiment of a wireless earbud without a tip portion. 
         FIG. 3B  shows a back view of one embodiment of a wireless earbud without a tip portion. 
         FIG. 3C  shows a front view of one embodiment of a wireless earbud without a fin. 
         FIG. 3D  shows a back view of one embodiment of a wireless earbud without a fin. 
         FIG. 4A  shows one embodiment of a wireless earbud positioned in a user&#39;s ear. 
         FIG. 4B  shows one embodiment of a wireless earbud positioned in a user&#39;s ear. 
         FIG. 5A  shows one embodiment of wireless earbuds being removed from a case and positioned in an earbud charging or storage device or removed from an earbud charging or storage device and positioned in a case. 
         FIG. 5B  shows an interior perspective view of one embodiment of an earbud charging or storage device. 
         FIG. 5C  shows an exterior perspective view of one embodiment of an earbud charging or storage device. 
         FIG. 6A  shows a front view of one embodiment of a case housing two earbuds. 
         FIG. 6B  shows a front view of one embodiment of a case housing a mobile computing device and two earbuds. 
         FIG. 6C  shows a back view of one embodiment of a case housing two earbuds. 
         FIG. 6D  shows one embodiment of an interchangeable top portion of a case not including an earbud cavity. 
         FIG. 6E  shows various embodiments of an interchangeable top portion of a case. 
         FIG. 6F  shows one embodiment of a charging contact for an interchangeable top portion of a case. 
         FIG. 7A  shows one embodiment of a layered circuit board configuration. 
         FIG. 7B  shows one embodiment of a layered circuit board configuration in a case. 
         FIG. 8  shows one embodiment of a layered circuit board configuration and battery in a case. 
         FIG. 9A  shows a partial side view of one embodiment of a reference case. 
         FIG. 9B  shows a partial side view of one embodiment of a case of the present disclosure. 
         FIG. 9C  shows a side view of one embodiment of a case of the present disclosure. 
         FIG. 10  shows one embodiment of a sealing layer of the back panel of the case. 
         FIG. 11A  shows a cross-sectional view of one embodiment of pinch-to-remove earbud housed in a case. 
         FIG. 11B  shows a cross-sectional view of one embodiment of an earbud being pinch removed from a case. 
         FIG. 12A  shows a perspective view of one embodiment of two earbuds locked into an earbud cavity in a top portion of a case. 
         FIG. 12B  shows a top view of one embodiment of two earbuds locked into an earbud cavity in a top portion of a case. 
         FIG. 13A  shows one embodiment of a switch mechanism and charging mechanism for charging the earbuds and deactivating a wireless signal originating from the mobile computing device or the case when the earbuds are housed in the case. 
         FIG. 13B  shows one embodiment of a cross-sectional view of a switch mechanism and charging mechanism for charging the earbuds and deactivating a wireless signal originating from the mobile computing device or the case when the earbuds are housed in the case. 
         FIG. 13C  shows one embodiment of a cross-sectional view of a switch mechanism and charging mechanism for charging the earbuds and deactivating a wireless signal originating from the mobile computing device or the case when the earbuds are housed in the case. 
         FIG. 13D  shows one embodiment of a cross-sectional view of a charging mechanism, including a conductive surface of an earbud inline with a charging contact disposed in a top portion of the case, positioned in a second housing defined by a dividing layer and a back panel of the case. 
         FIG. 14A  shows one embodiment of a top portion of a case decoupled from a bottom portion of the case. 
         FIG. 14B  shows one embodiment of a top portion of a case decoupled from a bottom portion of the case and the bottom portion of the case coupled to a mobile computing device. 
         FIG. 14C  shows one embodiment of a top portion of a case coupled to a bottom portion of the case, thus restraining the mobile computing device therein. 
         FIG. 15A  shows one embodiment of a front panel of a case decoupled from a back panel of the case. 
         FIG. 15B  shows one embodiment of a front panel of a case decoupled from a back panel of the case and the back panel of the case coupled to a mobile computing device. 
         FIG. 15C  shows one embodiment of a front panel of a case coupled to a back panel of the case, thus restraining the mobile computing device therein. 
         FIG. 16A  shows a perspective view of one embodiment of a lens coupleable to a case. 
         FIG. 16B  shows a perspective view of one embodiment of a lens coupled to a case. 
         FIG. 16C  shows a side perspective view of one embodiment of a lens. 
         FIG. 16D  shows a top perspective view of one embodiment of a lens coupleable to a case. 
         FIG. 17A  shows a communication system between a mobile computing device (master) and wireless earbuds (slaves). 
         FIG. 17B  shows a communication system between a case (master) and wireless earbuds (slaves). 
         FIG. 18A  shows one embodiment of a communication system between a mobile computing device, a case, and wireless earbuds. 
         FIG. 18B  shows one embodiment of a communication system between a computing device, a case, and wireless earbuds. 
         FIG. 19A  shows one embodiment of a communication system between a mobile computing device and wireless earbuds and a charging system between a case and wireless earbuds. 
         FIG. 19B  shows one embodiment of a communication system between a computing device and wireless earbuds and a charging system between a case and wireless earbuds. 
         FIG. 20  shows a flow chart of one embodiment of a method of wireless communication between a computing device, a case, and wireless earbuds. 
         FIG. 21  shows a flow chart of one embodiment of a method of wireless communication between a computing device and wireless earbuds. 
         FIG. 22  shows a flow chart of one embodiment of a method for manipulation of data transfer modes. 
     
    
    
     DETAILED DESCRIPTION OF THE INVENTION 
     The above mentioned aspects, as well as other aspects, features, and advantages of the present technology will now be described in connection with various embodiments. The inclusion of the following embodiments is not intended to limit the invention to these embodiments, but rather to enable any person skilled in the art to make and use this invention. Other embodiments may be utilized and modifications may be made without departing from the spirit or scope of the subject matter presented herein. Aspects of the disclosure, as described and illustrated herein, can be arranged, combined, modified, and designed in a variety of different formulations, all of which are explicitly contemplated and form part of this disclosure. 
     Disclosed herein are systems including wireless earbuds with integrated charging and communication systems and methods for using such systems. In general, the systems and methods described herein are used by a user. A user may include: a female, a male, a person partaking in an activity (e.g., exercising, biking, walking, dancing, playing sports, working, doing yard work, etc.); a disc jockey (DJ); a service personnel or technician (e.g., fast-food service, clothing retail, make-up retail, telecommunications, etc.); a scientist; a hard-of-hearing or deaf person; a performer or musician (e.g., pianist, soloist, conductor, etc.); a person driving; or any other person needing or using the systems and methods described herein. 
     As used herein, a “computing device” refers to any stationary or portable computing device. For example, a computing device includes a desktop computer, laptop, netbook, mobile or cellular phone, notebook, personal computer, personal digital assistant (PDA), workstation, server, and wearable computer (e.g., Google Glass, Apple Watch, Pebble, FitBit, etc.). 
     As used herein, a “mobile computing device” refers to any portable computing device. For example, a mobile computing device includes a laptop, netbook, mobile or cellular phone, notebook, PDA, and wearable computer. 
     As used herein, a “case” refers to any material and/or device that protects, shields, or encases partially or wholly a computing device or mobile computing device. For example, a case may include plastic (e.g., polypropylene, polyurethane, etc.), carbon fiber, leather, synthetic leather, wood, metal, rubber, silicone, or any other suitable material known to one of skill in the relevant art. A case may include one intact rigid section, such that the computing device snaps into the case. A case may include one bendable section, such that the case is bent or maneuvered to fit around the computing device. A case may include two sections that snap-fit together, are hinged together, slide together, click together, or otherwise couple together to form the case. A case may include a plurality of sections that couple together to form the case. The case may be tailored to suit any mobile computing device, for example a mobile computing device from Samsung®, Apple®, Nokia®, HTC®, Sony Ericsson®, LG Electronics®, Blackberry®, Motorola®, Sony®, MyPhone®, Huawei®, Alcatel®, Lenovo®, Cherry Mobile®, Micromax®, Jolla®, Asus®, and/or any other company or brand marketing or commercializing mobile computing devices. 
     As used herein, an “earbud” refers to an earphone inserted into the ear, an earphone worn in the ear for use with audio devices, a headphone that fits inside the ear against the outer opening of the ear canal, or, in some embodiments, a hearing aid. 
     As used herein, “wireless” refers to communication via Bluetooth, low energy Bluetooth, near-field communication, infrared, near field magnetic induction, wireless local area network (WLAN), or any other radiofrequency technology. In some embodiments, “wireless” also refers to communication using near field magnetic induction. In some embodiments, “wireless” also refers to power transfer systems that use, for example, induction (e.g., magnetic). As used herein, a wireless earbud may receive a wireless data transfer at any frequency, amplitude, or form from the case, mobile computing device, or computing device. 
     As used herein, “monophonic” or “wireless data transfer” refers to wireless communication using a single frequency directed to one terminal or end point (e.g., earbud). In some embodiments, monophonic or wireless data transfer refers to the same packet of information, data, or audio being transmitted to the first earbud and then the second earbud. The first and second earbuds receive the same packet of information, data, or audio (i.e., packet includes data for a single channel). In some embodiments, monophonic or wireless data transfer refers to the same packet of information, data, or audio being transmitted to the first earbud and then the second earbud, but each earbud plays the relevant portion of the packet intended for the respective earbud (i.e., packet includes data for two or more channels). For example, the first earbud plays a first channel from the packet at the same time as the second earbud is playing a second channel from the packet. 
     As used herein, “stereophonic” or “a plurality of wireless data transfers” refers to wireless communication using multiple frequencies either simultaneously or asynchronously directed to two or more termini or end points (e.g., earbuds). In some embodiments, “stereophonic” or “a plurality of wireless data transfers” refers to the amplitude of at least two waves of the same frequency, out-of-phase with each other (e.g., 90°, in quadrature) being changed (i.e., modulated or keyed) to represent the data signal. The first wireless earbud receives a first wave comprising a first amplitude and the second wireless earbud receives a second wave comprising a second amplitude. In some embodiments, each wave or wireless data transfer includes the same packet of information, data, or audio being transmitted to the first and second earbuds. The first and second earbuds receive the same packet of information, data, or audio (i.e., packet includes data for a single channel). In some embodiments, each wave or wireless data transfer includes the same packet of information, data, or audio being transmitted to the first and second earbuds, but each earbud plays the relevant portion of the packet intended for the respective earbud (i.e., packet includes data for two or more channels). For example, the first earbud plays a first channel from the packet at the same time as the second earbud is playing a second channel from the packet. 
     As used herein, “packet” refers to data, information, audio data, etc. for one or more channels played through an earbud, set of earbuds, headset, headphone; microphone information, configuration, or settings; and/or earbud button push information (e.g., pausing, playing, forward skipping, and backward skipping, initiating a phone call, receiving an incoming phone call, disconnecting an in-progress phone call, prompting the use of a virtual assistant associated with the computing device, adjusting the volume, earbud battery capacity level, charging connection, etc.). 
     Systems 
     In some embodiments, a system for storing and charging one or more earbuds  64  includes a case  10 .  FIGS. 1A-1B  show a front view and bottom perspective view, respectively, of one embodiment of a case  10 . The case  10  functions to cushion, insulate, shield, or otherwise protect the mobile computing device  12  disposed in the case  10  from impacts associated with use, dropping, throwing, or misusing the mobile computing device  12 . The case  10  includes a plurality of sidewalls  14 , a front panel  15 , a back panel  16  (as shown in  FIG. 6C ), a dividing layer  13  between the front panel  15  and the back panel  16  (as shown in  FIG. 6A ), a bottom portion  18 , and a top portion  20  opposite the bottom portion  18 . In some embodiments, the front panel  15  is parallel to the back panel  16 . In some embodiments, the front panel  15  is parallel to the dividing layer  13 . In some embodiments, the back panel  16  is parallel to the dividing layer  13 . 
     The plurality of sidewalls  14  physically constrain a mobile computing device  12  positioned or disposed in the case  10 , as shown in  FIG. 1B  and  FIG. 6B . The plurality of sidewalls  14  extend from the back panel  16  or around a perimeter of the back panel  16  and are configured to couple the back panel  16  to the front panel  15  or a perimeter or perimeter portion of the back panel  16  to a perimeter or a perimeter portion of the front panel  15 . As shown in  FIGS. 6A, 8, and 10 , the front panel  15  and the dividing layer  13  together define a first housing  22  configured to receive and restrain a mobile computing device  12 . As shown in  FIGS. 8 and 10 , the dividing layer  13  and the back panel  16  together define a second housing  38  configured to receive one or more electronic components (e.g., one or more PCBs, battery, earbud charging contact, switch mechanism, antenna, etc.), as described in further detail elsewhere herein. 
     In some embodiments, a thickness of the second housing  38  and the back panel  16  does not exceed 4 mm, 5 mm, 6 mm, or 7 mm. In one embodiment, a thickness of the second housing  38  and back panel  16  does not exceed 5 mm. In one embodiment, a thickness of the second housing  38  and back panel  16  does not exceed 5.5 mm. In one embodiment, a thickness of the second housing  38  and back panel  16  does not exceed 6 mm. In one embodiment, a thickness of the second housing  38  and back panel  16  does not exceed 6.5 mm. In one embodiment, a thickness of the second housing  38  and back panel  16  does not exceed 7 mm. 
     In some embodiments, as shown in  FIG. 1A , the front panel  15  includes a viewing aperture  17  extending therethrough. The viewing aperture  17  functions to display a portion of or all of a display or screen of a mobile computing device  12 . In some embodiments, a perimeter of the viewing aperture  17  may be continuous or discontinuous. In some such embodiments, as shown in  FIG. 1C , a discontinuous viewing aperture perimeter may include one or more breaks, grooves, or bevels  25  to accommodate one or more components, for example a power button  27  or one or more volume adjustment buttons  33 . In some embodiments, as shown in  FIG. 9C , a first portion P 1  of the front panel  15  is parallel to the back panel  16  and a second portion P 2  of the front panel  15  includes a groove or widening to accommodate one or more of the wireless earbuds  64 . 
     In some embodiments, the plurality of sidewalls  14  each include a bumper, padding, cushion, lining, or packing for providing shock absorption and/or cushion to the mobile computing device  12 . The cushion may be sealed, adhered, glued, or otherwise coupled to an inner surface of each of the sidewalls  14  to contact an outer edge of a mobile computing device  12 . A subset of the plurality of sidewalls  14  includes one or more apertures for displaying, for example, a power switch, audio cable input, earbud cable input, and/or power cable input of a mobile computing device  12  disposed in the case  10 . A subset of the plurality of sidewalls  14  includes one or more protrusions sized and shaped to fit over one or more buttons, for example a power button or volume adjustment button, of a mobile computing device  12  disposed in the case  10 . A subset of the plurality of sidewalls  14  or a bottom portion  18  may further include a connector  19  (e.g., Lightning, IEEE 1394, Thunderbolt, DVI, HDMI, Serial, Universal Serial Bus, Parallel, Ethernet, Coaxial, VGA, PS/2, etc.) configured to electrically couple the case  10  to the mobile computing device  12  or another computing device, for example as shown in  FIG. 1A ,  FIG. 6A , and  FIG. 8 . In some embodiments, a subset of the plurality of sidewalls  14  define an earbud cavity  34  configured to receive the wireless earbud  64 , as described in further detail elsewhere herein. 
     The dividing layer  13  provides a surface for supporting and/or contacting a back surface of a mobile computing device  12  positioned in the first housing  22  in the case  10 . 
     In some embodiments, the back panel  16  provides a surface for supporting and/or contacting one or more electronic components positioned in the second housing  38  in the case  10 . For example, one or more electronic components may include, but not be limited to, a battery  32 , one or more PCBs, a switch mechanism  62 , and an earbud charging contact  76 . In some embodiments, as shown in  FIG. 6C , the back panel  16  includes one or more camera apertures  24  extending there through for revealing, for example, a camera or flash associated with a mobile computing device  12  disposed in the case  10 . In some embodiments, the back panel  16  is planar or substantially flat. For example, the back panel  16  may not include any widening or bulge to accommodate one or more wireless earbuds  64  in the case  10  or any other component. 
     In some embodiments, as shown in  FIGS. 7A-7B , the second housing  38  houses one or more printed circuit boards (PCBs) for controlling the functionality of the case  10 , mobile computing device  12 , and/or earbuds  64 . As shown in  FIG. 8 , the PCBs may be tiered, layered, and/or stair-stepped in the second housing  38  to reduce thickness of the case  10  and/or to give corners of the case  10  a rounded profile. For example, as shown in  FIG. 8 , a top PCB  26  and a center PCB  30  may be positioned in the second housing  38  of the case  10  parallel to the back panel  16  and adjacent to the battery  32 . A bottom PCB  28  may be positioned in the first housing  22  adjacent to the mobile computing device  12 , as described in further detail elsewhere herein. 
     The top PCB  26  functions to charge a rechargeable battery in one or more earbuds  64  and/or to detect a presence of one or more earbuds  64  positioned in the earbud cavity  34  in the top portion  20  of the case  10 . The top PCB  26  comprises one or more charging contacts  76  for one or more wireless earbuds  64  and/or an earbud detection switch  62 , for example to turn off a wireless signal emanating from the case  10  or the mobile computing device  12  when the one or more earbuds  64  are positioned in the earbud cavity  34  in the top portion  20  of the case  10 . The charging mechanism and wireless signal switch are described in further detail elsewhere herein. 
     The bottom PCB  28  includes a case charging receptacle or jack, a computing device charge switch (i.e., activate or deactivate charging of the mobile computing device  12  using the battery disposed in the case), and/or one or more optical (e.g., LED, OLED, etc.) battery charge indicators. In one embodiment, a user manually activates or deactivates charging of the mobile computing device  12  disposed in the case  10  using the computing device charge switch. In one embodiment, one or more PCBs of the system automatically detect a charge status of the mobile computing device  12  disposed in the case  10  and activate or deactivate charging of the mobile computing device  12  disposed in the case  10  accordingly. The top  26  and bottom  28  PCBs are easily, readily, and affordably replaceable or interchangeable to tailor the case  10  to a model or type of mobile computing device  12 . 
     In one embodiment, as shown in  FIGS. 7A-7B , the center PCB  30  includes one or more wireless antennas  36 , one or more processors  31 , and/or a battery management system  29 . Alternatively, the center PCB  30  may include one or more wireless antennas  36  and one or more processors  31 . Alternatively, the center PCB  30  includes a battery management system  29  and one or more processors  31 . The center PCB  30  is positioned in the case  10  to limit or reduce the need to change the center PCB  30  in the case  10  for different models and/or types of mobile computing devices  12 . The center PCB  30  is electrically coupled by flex wires or cables to the top  26  and bottom  28  PCBs to control and provide power to or receive power from or input control signals from the top  26  and bottom  28  PCBs. 
     The processor  31  of the center PCB  30  may be a general purpose microprocessor, a digital signal processor (DSP), a field programmable gate array (FPGA), an application specific integrated circuit (ASIC), or other programmable logic device, or other discrete computer-executable components designed to perform the functions described herein. The processor  31  may also be formed of a combination of computing devices, for example, a DSP and a microprocessor, a plurality of microprocessors, one or more microprocessors in conjunction with a DSP core, or any other suitable configuration. 
     In some embodiments, the processor  31  is coupled, via one or more buses, to the memory in order to read information from, and optionally write information to, the memory. The memory may be any suitable computer-readable medium that stores computer-readable instructions for execution by the processor  31 . For example, the computer-readable medium may include one or more of RAM, ROM, flash memory, EEPROM, a hard disk drive, a solid state drive, or any other suitable device. In some embodiments, the computer-readable instructions include software stored in a non-transitory format. The software may be programmed into the memory or downloaded as an application onto the memory. The software may include instructions for managing or running a communication system and/or one or more programs or applications of the case  10 , as described elsewhere herein. 
     In some embodiments, the top  26  and center  30  PCBs are combined into one PCB; the bottom  28  and center  30  PCBs are combined into one PCB; or the top  26 , center  30 , and bottom  28  PCBs are combined into one PCB. In some embodiments, less than or more than three PCBs may be used to achieve the desired functionality in the case  10 . 
     In some embodiments, as shown in  FIGS. 7A-7B , the antennas  36  are positioned in the bottom corners of the bottom portion  18  of the case  10 . The corner position of each antenna  36  functions to provide an air gap between the antenna  36  and the sidewalls  14  of the case  10  to allow the antennas  36  to receive and transmit data more effectively. In some embodiments, the antenna  36  of the center PCB  30  includes one or both of a receiver and a transmitter. The receiver receives data over a communication network and demodulates the received data. The transmitter prepares data according to one or more network standards and transmits data over a communication network. In some embodiments, a transceiver antenna acts as both a receiver and a transmitter for bi-directional wireless communication. In some embodiments, the center PCB  30  includes a first transceiver (or first transmitter) and a first antenna dedicated to a first earbud  64   a  and a second transceiver (or second transmitter) and a second antenna dedicated to a second earbud  64   b . In some embodiments, a first antenna, receiver, or transceiver receives a wireless data transfer from a mobile computing device  12  and a second antenna, transmitter, or transceiver transmits a plurality of wireless data transfers directly to at least a first wireless earbud  64   b  and a second wireless earbud  64   b . In some embodiments, the first wireless earbud  64   a  receives the plurality of wireless data transfers at a first frequency and the second wireless earbud  64   b  receives the plurality of wireless data transfers at a second frequency. Alternatively, in some embodiments, the first wireless earbud  64   a  receives the plurality of wireless data transfers at a first frequency, the first frequency comprising a first wave comprising a first amplitude: the second wireless earbud  64   b  receives the plurality of wireless data transfers at a second frequency, the second frequency comprising a second wave comprising a second amplitude. In some such embodiments, the first frequency and the second frequency are the same. 
     The center PCB  30  may further include a battery management system  29 . The battery management system  29  functions to, for example, protect the battery  32  from operating outside its safe operating area (i.e., voltage and current condition over which device can be operated without self-damage), monitoring the state of the battery  32 , controlling the environment of the battery  32 , and/or battery balancing (i.e., maximizing capacity of battery to increase battery longevity). In some embodiments, the battery management system  29  includes charging order or prioritization. In one embodiment, the battery management system  29  prioritizes charging the mobile computing device  12  first and the battery  32  disposed in the case  10  second. In one embodiment, the battery management system  29  prioritizes charging the battery  32  disposed in the case  10  first and the mobile computing device  12  second. In one embodiment, the battery management system  29  splits charging capacity equally, proportionally, or randomly between the battery  32  disposed in the case  10  and the mobile computing device  12 . In some embodiments, the battery  32  is managed so that it does not discharge completely to recharge the mobile computing device  12 . For example, the battery  32  may be allowed to discharge to a predetermined threshold (e.g., 50%, 60%, 70%, 80%, 90%, etc. of its rated capacity) to charge the mobile computing device  12  disposed in the case  10  so that a percentage of the battery power remains for charging one or more wireless earbuds  64  disposed in the case  10 . 
     As shown in  FIGS. 7A-7B ,  FIG. 8 , and  FIG. 10 , the second housing  38  further includes a rechargeable battery  32  disposed therein and electrically coupled to the center PCB  30 , top PCB  26 , and bottom PCB  28 . In some embodiments, the rechargeable battery  32  is a nickel cadmium, nickel-metal hydride, lead acid, lithium ion, or lithium polymer battery. In one non-limiting example, the rechargeable battery  32  is a lithium ion battery. In one embodiment, as shown in  FIG. 10 , the battery  32  is positioned parallel to the back panel  16  in the second housing  38  defined by the dividing layer  13  and the back panel  16 . A mid-section of the back panel  16  of the case  10  has an outer surface  40  that forms the outside surface of the case  10 , the inner surface  42  of the mid-section of the back panel  16  is directly against the back surface of the battery  32 . The front surface  44  of the battery  32  is directly against the dividing layer  13 . 
     In some embodiments, the dividing layer  13  at least partially comprises a sealing layer to further reduce a thickness of the case  10 . In some such embodiments, an adhesive side of the sealing layer is directly against the front surface  44  of the battery  32 , and the non-adhesive side of the sealing layer is positioned directly against the back side of the mobile computing device  12  positioned in the case  10 . Said alternatively, a back surface of the rechargeable battery  32  is positioned against the back panel  16  and a front surface  44  of the rechargeable battery  32  is adjacent to and secured by a sealing layer. In some embodiments, the sealing layer minimizes thickness of the dividing layer  13  and therefore the overall thickness of the case  10 . In some embodiments, the sealing layer may employ a pressure sensitive adhesive to bond a membrane or other material to the battery  32  to secure the battery  32  in the second housing  38 . Non-limiting examples of pressure sensitive adhesives include: natural rubber, vinyl ethers, acrylics, butyl rubber, styrene block copolymers, silicones, or nitriles mixed with a resin, for example terpene-phenol, terpenes, aromatic resins, and hydrogenated hydrocarbon resins. In some embodiments, the sealing layer may employ a structural adhesive, for example epoxies, cyanoacrylates, urethanes, or acrylics, that secures a thin membrane or material over the battery  32  to secure the battery  32  in the second housing  38 . In some embodiments, the dividing layer  13  and/or sealing layer is 0.05 to 0.5, 0.05 to 0.1, 0.1 to 0.15, 0.15 to 0.2, 0.2 to 0.25, 0.25 to 0.3, 0.3 to 0.35, 0.35 to 0.4, 0.4 to 0.45, or 0.45 to 0.5 millimeters thick. In one non-limiting embodiment, the sealing layer is 0.2 to 0.3 millimeters thick. 
     The bottom portion  18  of the case  10 , as shown in  FIG. 6A  and  FIG. 7B , houses the bottom PCB  28  in some embodiments and provides a case charging receptacle or jack, a computing device charge switch, and/or apertures to view one or more optical (e.g., LED, OLED, etc.) battery charge indicators. 
     The top portion  20  of the case  10 , as shown in  FIGS. 1A-1B ,  FIGS. 6A-6C , and  FIGS. 11A-11B , includes an earbud cavity  34  configured to receive one or more wireless earbuds  64 . In some embodiments, a subset of the plurality of sidewalls  14 , the back panel  16 , and a second portion of the front panel  15  together define the earbud cavity  34 . Alternatively or additionally, in some embodiments, the earbud cavity  34  is positioned adjacent to the first housing  22 , the dividing layer  13 , and the second housing  38  and/or parallel to the front panel  15  and the back panel  16 . For example, as shown in  FIG. 1D , the earbud cavity  34  and/or one or more wireless earbuds  64  positioned in the earbud cavity  34  may intersect a first housing longitudinal plane  65 , a dividing layer longitudinal plane  67 , and a second housing longitudinal plane  69 . Said alternatively, the earbud cavity  34  and/or one or more wireless earbuds  64  positioned in the earbud cavity  34  are inline with a first housing plane  65 , a dividing layer plane  67 , and a second housing plane  69 . Said alternatively, the earbud cavity  34  and/or one or more wireless earbuds  64  positioned in the earbud cavity  34  share a horizontal plane or longitudinal plane  65 ,  67 ,  69  with the first housing  22 , dividing layer  13 , and second housing  38 . In some embodiments, a battery  32 , one or more charging contacts  76 , and/or one or more wireless earbuds  64  all share or are positioned in a second housing longitudinal plane  69 , for example between the dividing layer  13  and the back panel  16 . Further for example, as shown in  FIG. 1E , the earbud cavity  34  and/or one or more wireless earbuds  64  positioned in the earbud cavity  34  may intersect a front panel longitudinal plane  61 , a dividing layer longitudinal plane  67 , and a back panel longitudinal plane  63 . Said alternatively, the earbud cavity  34  and/or one or more wireless earbuds  64  positioned in the earbud cavity  34  are inline with a front panel plane  61 , a dividing layer plane  67 , and a back panel plane  63 . Said alternatively, the earbud cavity  34  and/or one or more wireless earbuds  64  positioned in the earbud cavity  34  share a horizontal plane or longitudinal plane  61 ,  67 ,  63  with the first housing  22 , dividing layer  13 , and second housing  38 . 
       FIG. 9A  shows a side view of a reference case  10 R in which an earbud  64 R is positioned behind a first housing  22 R and dividing layer  13 R, behind a mobile computing device  12 R disposed in the reference case  10 R. This orientation results in an overall reference case thickness T 1  plus T 3 . In contrast, as shown in  FIG. 9B  and  FIGS. 1D -IE, the case  10  described herein has one or more earbuds  64  positioned adjacent to, intersecting, or sharing a longitudinal or horizontal plane with the first housing  22 , the dividing layer  13 , and the second housing  38 , as described elsewhere herein, resulting in an overall case thickness T 1 , which is less than T 1  plus T 3 . In some embodiments, as shown in  FIG. 9C , a thickness T 1  of the case  10  does not exceed 10 mm, 11 mm, 12 mm, 13 mm, 14 mm, 15 mm, 16 mm, 17 mm, 18 mm, 19 mm, or 20 mm. In one embodiment, a thickness T 1  of the case  10  does not exceed 19.0 mm. Further, in some embodiments, as shown in  FIG. 9C , a thickness T 2  of the case  10  does not exceed 8 mm, 9 mm, 10 mm, 11 mm, 12 mm, 13 mm, 14 mm, 15 mm, or 16 mm. In one embodiment, a thickness T 2  of the case  10  does not exceed 14.5 mm. In some embodiments, T 1  is equal to T 2 ; in some embodiments, T 1  is different than T 2 . In some embodiments, as shown in  FIG. 6C , a length L of the case  10  does not exceed 110 mm, 120 mm, 130 mm, 140 mm, 150 mm, 160 mm, 170 mm, or 180 mm. In one embodiment, a length L of the case  10  does not exceed 167 mm. In some embodiments, as shown in  FIG. 6C , a width W of the case  10  does not exceed 50 mm, 60 mm, 70 mm, 80 mm, 90 mm, or 100 mm. In one embodiments, a width W of the case  10  does not exceed 75 mm. 
     In some embodiments, the top portion  20  includes more than one earbud cavity  34 , such that each earbud cavity  34  houses one earbud  64  or each earbud cavity  34  houses more than one earbud  64 . Alternatively, in some embodiments, one or more earbuds  64  are housed externally to the case  10 , as shown in  FIGS. 5A-5C , and/or a top portion  20  of the case  10  including the earbud cavity  34  is removeable and/or interchangeable with a second top portion  23  that does not include an earbud cavity, as shown in  FIG. 6D . In some such embodiments, the second top portion  23  functions to secure and/or protect the mobile computing device  12  when coupled to the bottom portion  18  when, for example, the user does not desire to have one or more earbuds  64  with him/her or the user is participating in an activity involving water. Alternatively, in some embodiments, as shown in  FIG. 6E , the second top portion includes one or more Universal Serial Bus (USB) ports  41  for matingly receiving a USB drive  49  or USB connector/adapter  51 , a credit card reader  43 , a scanner or projector  45 , or a breathalyzer  47 . The second top portion  23  may, in some embodiments, include a flashlight, kickstand, keyboard (e.g., qwerty), a photo enhancement, a wall plug (i.e., to directly charge case  10  and/or mobile computing device  12  disposed in the case  10  from a wall outlet), a projector module (i.e., to project images from the mobile computing device  12  onto a surface), a solar power panel (e.g., for charging the case  10  and/or a mobile computing device  12  disposed in the case  10 ), a thermal imager (e.g., an infrared camera to detect heat), a bottle opener, an electric lighter, an external speaker, a contactless wireless charger (e.g., for induction charging), a scanner (e.g., for reading near-field communication tags, QR codes, barcodes, etc.), a strobe light, a Selfie Flash (i.e., forward facing soft light for pictures), or a power bank (e.g., using USB connector/adapter  51  to power additional devices using the battery  32  in the case  10 ). 
     In some embodiments, the second top portion, for example a credit card reader  43 , may receive charge from a battery  32  disposed in the case  10  via earbud charging contacts  76 , as shown in  FIG. 6F . The second top portion may receive charge and/or transmit data back to the case  10  or receive data from the case  10  directly via one or more earbud charging contacts  76  or via wireless communication (e.g., Bluetooth). In another embodiment, the second top portion may receive charge and/or transmit data to or receive data from a mobile computing device  12  indirectly via the case  10  (e.g., via connector  19 ) or directly using wireless communication. In some embodiments, only one earbud charging contact  76  is required to charge and/or transmit data to or from the second top portion; in other embodiments, more than one or a plurality of earbud charging contacts  76  is required to charge and/or transmit data to or from the second top portion. 
     In some embodiments, as shown in  FIGS. 6A-6C  and  FIGS. 11A-11B , a perimeter of an opening of the earbud cavity  34  is concave or has a concave shape so that a top portion  46  and/or a front portion  35  and a back portion  37  of each earbud  64  is exposed in the earbud cavity  34  allowing each earbud  64  to be removed from the earbud cavity  34  using a pinching mechanism or method. For example, as shown in  FIG. 11B , a user may use an index finger and thumb to grip or pinch the front portion  35  and the back portion  37  of the earbud  64  simultaneously or substantially simultaneously to insert or remove the earbud  64  from the earbud cavity  34 . Alternatively, in some embodiments, a perimeter of an opening of the earbud cavity  34  has a linear or convex shape so that an earbud  64  within the earbud cavity  34  is unexposed but inline with the top portion  20  of the case  10 . Alternatively, in some embodiments, one or more earbuds  64  may protrude from the earbud cavity  34  in the top portion  20  of the case  10  for easy removal of the one or more earbuds  64  from the top portion  20  of the case  10 . 
     In some embodiments, the top portion  20  of the case  10  further includes a locking mechanism  48  to removably secure one or more earbuds  64  within the earbud cavity  34  of the top portion  20  of the case  10 , as shown in  FIGS. 12A-12B . The locking mechanism  48  is adjacent to the first housing  22 , along a top edge  21  of the mobile computing device  12 , adjacent to the earbud cavity  34 . Since the earbud cavity  34  does not consume the entire volume of the top portion  20 , the position of the locking mechanism  48  (either to the left or right (adjacent to) of the earbud cavity in the top portion) prevents the locking mechanism  48  from adding additional length and thickness to the top portion  20  of case  10 . As shown in  FIG. 12A , the locking mechanism  48  encased in the top portion  20  is horizontally H in-line with the earbud cavity  34 , vertically V in-line with the first housing  22  and the second housing  38  of the case  10 , as shown in  FIG. 12A . This configuration does not increase the overall case width W. In some embodiments, the locking mechanism  48  includes a stationary lock for the first earbud  64   a  and sliding lock for the second earbud  64   b . For example, the locking mechanism  48  may include a stationary stop  50  on a first side of the locking mechanism  48  and a movable stop  52  on a second side of the locking mechanism  48 . 
     During use, as shown in  FIG. 12B , a slider  54  on the second side of the locking mechanism  48  is horizontally adjusted, maneuvered, or displaced by applying horizontal force F to the slider  54  to compress a spring or series of springs  56  in the locking mechanism  48  to horizontally displace the movable stop  52  on the second side of the locking mechanism  48 . The first earbud  64   a  is positioned against the stationary stop  50  on the first side of the locking mechanism  48 , and the second earbud  64   b  is positioned next to the first earbud  64   a  adjacent to the second side of the locking mechanism  48  next to the movable stop  52 . Release of the force F applied to the slider  54  allows the movable stop  52  to horizontally contact and secure or lock into place the second earbud  64   b . Alternatively, in some embodiments, the locking mechanism  48  includes a stationary lock for both earbuds  64 , such that each earbud  64  is snapped into the earbud cavity  34  in the top portion  20  of the case  10 . Alternatively, in some embodiments, the locking mechanism  48  includes a sliding lock for both earbuds  64 . For example, each side of the locking mechanism  48  may include a slider  54  to compress a spring or series of springs  56  and horizontally displace a movable stop  52 . In some embodiments, maneuvering the slider  54  compresses any linear or rotational force applying element (e.g., plastic spring arm, rotary coil spring type of release, etc.) that achieves the same endpoint of locking the earbud  64  in the earbud cavity  34  of the case  10 . 
     Alternatively, in some embodiments, the locking mechanism  48  includes a pressure locking-releasing mechanism. For example, a user may apply force or pressure to an earbud  64  to removably secure or lock the earbud  64  in the earbud cavity  34  and to release or unlock the earbud  64  from the earbud cavity  34 . The force or pressure used to secure or lock the earbud  64  in the earbud cavity  34  may compress or load a spring and activate a lock, whereas the force or pressure used to release or unlock the earbud  64  from the earbud cavity  34  may decompress or expand the spring to a normal (i.e., unloaded) position. 
     Further, as shown in  FIGS. 13A and 13D , the earbud cavity  34  in the top portion  20  of the case  10  includes at least one earbud charging contact  76  per earbud  64 . The earbud charging contact  76  is configured to contact and charge the wireless earbud  64  when the wireless earbud  64  is positioned in the case  10 . The earbud charging contact  76  aligns with and interfaces with a conductive surface  78  on the body  70  of the earbud  64  (also shown in  FIGS. 2A-2F  and  FIGS. 3A-3D ). The earbud charging contact  76  is disposed within the second housing  38  defined by the dividing layer  13  and the back panel  16  to minimize a thickness T of the case  10 . For example, the earbud charging contact  76  may be positioned between the dividing layer  13  and the back panel  16 , as shown in  FIGS. 1D-1E, 9B . In some embodiments, the earbud charging contact  76  is further positioned adjacent to or in the same plane as a rechargeable battery  32  disposed in the second housing  38 . 
     In some embodiments, the fin  68  of the earbud  64  is shaped such that the earbud  64  only fits into the earbud cavity  34  in one orientation so that the conductive surface  78  on the body  70  of the earbud  64  always interfaces with the earbud charging contacts  76  in the second housing  38 . In some embodiments, the earbud charging contacts  76  are spring loaded pins or stationary pins. In some embodiments, the first earbud  64   a  receives charge from the case  10 , for example using the earbud charging contacts  76 , and the second earbud  64   b  receives charge from the first earbud  64   a  using, for example, induction or one or more conductive surfaces on the second earbud  64   b  interfacing with a charging contact on the first earbud  64   a . In one embodiment, the first and second earbuds  64   a / 64   b  both receive power from the case  10  via induction charging and/or conductive charging. 
     Further, as shown in  FIG. 13A , the earbud cavity  34  in the top portion  20  of the case  10  includes a switch mechanism  62  that detects the presence or absence of the earbuds  64  in the earbud cavity  34 . In some embodiments, the switch mechanism  62  is disposed in the second housing  38  defined by the dividing layer  13  and the back panel  16 . This configuration prevents unnecessary width W or thickness T in the case  10  and prevents any bulging, swelling, or protrusions in the case  10  to accommodate the fins  68  of the earbuds  64  and/or the switch mechanism  62 . 
     In one non-limiting example, when the switch mechanism  62  is activated (i.e., earbuds are in the earbud cavity), the battery  32  recharges the rechargeable battery of the earbuds  64  positioned in the earbud cavity  34 ; when the switch mechanism  62  is deactivated (i.e., earbuds are not in the earbud cavity), the battery  32  does not supply power to recharge the earbuds  64  in the earbud cavity  34 . Further in some embodiments, when the switch mechanism  62  is activated (i.e., earbuds are in the earbud cavity), the wireless signal emanating from the case  10  and/or mobile computing device  12  is turned off or deactivated; when the switch mechanism  62  is deactivated (i.e., earbuds not in the earbud cavity), the wireless signal emanating from the case  10  and/or mobile computing device  12  remains active or on. 
     In one embodiment of the switch mechanism  62 , the mobile computing device  12  is communicatively coupled to the case  10 . In one embodiment of the switch mechanism  62 , the mobile computing device  12  is communicatively coupled to one or more earbuds  64 . For example, when an earbud  64  is being recharged in the case  10 , the earbud  64  may sense that it is being recharged and send a signal to the case  10  and/or mobile computing device  12  to deactivate a wireless signal emanating from the case  10  and/or mobile computing device  12 . The switch mechanism  62  conserves battery life since wireless signal broadcasting only occurs when the earbuds  64  are not positioned in the earbud cavity  34  in the top portion  20  of the case  10 . 
     The switch mechanism  62  may comprise a toggle switch. For example, positioning an earbud  64  in the earbud cavity  34  deflects D the lever to an “off” state, as shown in  FIG. 13A , and removal of the earbuds  64  allows a spring in the switch mechanism  62  to return the lever to a “normal” or “on” state. The switch mechanism  62  may comprise a selector switch similar in functionality to the toggle switch, except allowing two or more states (e.g., wireless off and charging on, wireless on and charging on, wireless off and charging off). The switch mechanism  62  may comprise a lever actuator switch similar in functionality to the toggle switch and selector switch, except further including a roller bearing or similar device to prevent the lever from wear over time from repeated use. The switch mechanism  62  of the top PCB  26  is electrically coupled to the center PCB  30  so that charging and wireless signal broadcasting are controlled by the center PCB  30 . 
     In some embodiments, a sidewall  14 , top portion  20 , bottom portion  18 , a front panel  15 , or back panel  16  of the case  10  further comprises a locater switch for locating one or more wireless earbuds  64 . The switch when depressed or activated may cause one or more wireless earbuds  64  to broadcast an audible signal (e.g., beep, buzz, spoken word(s), ring tone, etc.) to determine a location of the one or more wireless earbuds  64 . For hard of hearing or deaf users, the locater switch may activate an optical signal (e.g., LED) in the wireless earbud  64  for a visual determination of the wireless earbud&#39;s location. In some embodiments, an earbud  64  may communicate with the case  10  or mobile computing device  12  using an application downloaded and running on the mobile computing device  12  to indicate a location of the earbud  64 . For example, the application may indicate proximity of the earbud  64  to the case  10  or mobile computing device  12  based on a strength of the wireless signal. In some embodiments, color coding (e.g., red for close, blue for distant); metaphors (e.g., hot for close, cold for distant); a displayed relative distance; or any other parameter is used to indicate proximity. The wireless earbud  64  may further include a watch battery, button cell, or single cell battery, so that if the main battery in the wireless earbud  64  is dead or uncharged, the user may still locate the wireless earbud  64 . The watch battery, button cell, or single cell battery is sized and configured to be housed in the wireless earbud  64 . 
       FIGS. 14A-14C  show a top portion  20  and a bottom portion  18  of a case  10  transitionable between a decoupled state ( FIGS. 14A-14B ) and a coupled state ( FIG. 14C ). In the coupled state ( FIG. 14C ), the mobile computing device  12  is restrained in the case. As shown in  FIG. 14A , a top portion  20  of the case  10  is decoupled or uncoupled from a bottom portion  18  of the case  10 , such that the mobile computing device  12  is unrestrained. As shown in  FIG. 14B , the bottom portion  18  slides onto or receives a portion of the mobile computing device  12  and then a top portion  20  of the case  10  couples to the bottom portion  18  of the case  10  to fully restrain or secure the mobile computing device  12  in the case  10 , as shown in  FIG. 14C . 
       FIGS. 15A-15C  show a front panel  15  and a back panel  16  of a case  10  transitionable between a decoupled state ( FIGS. 15A-15B ) and a coupled state ( FIG. 15C ). In the coupled state ( FIG. 15C ), the mobile computing device  12  is restrained in the case  10 . As shown in  FIG. 15A , a front panel  15  of the case  10  is decoupled or uncoupled from a back panel  16  of the case  10 , such that the mobile computing device  12  is unrestrained. As shown in  FIG. 15B , a plurality of sidewalls  14 , coupled to a perimeter of the back panel  16 , is sized and configured to receive a mobile computing device  12 , as shown in  FIG. 15B . The front panel  15  of the case  10  couples to the back panel  16  of the case  10  to fully restrain or secure the mobile computing device  12  in the case  10 , as shown in  FIG. 15C . 
     In some embodiments, a system for storing and charging one or more earbuds  64  includes one or more earbuds  64 . The earbuds  64  may be wireless or wired to the case  10 .  FIGS. 2A-2F ,  FIGS. 3A-3D , and  FIGS. 4A-4B  show respective views of several embodiments of a wireless earbud  64  of the present system. The wireless earbud  64  includes a body  70 , optionally a fin  68  ( FIGS. 2A-2F ,  FIGS. 3A-3B  with fin,  FIGS. 3C-3D  without fin), and optionally a tip portion  72  ( FIGS. 2A-2F ,  FIGS. 3C-3D  with tip portion,  FIGS. 3A-3B  without tip portion). In some embodiments, the fin  68  and/or tip portion  72  are interchangeable or customizable so that the size and shape of the fin  68  and/or tip portion  72  are tailored to the size and shape of the ear of the user, for example a smaller ear as shown in  FIG. 4A  or a larger ear as shown in  FIG. 4B . The body  70  may further include a groove, indentation, or depression  84  for interfacing with a movable or stationary stop of the locking mechanism  48 , as described elsewhere herein. The body  70  may include a microphone  82 , rechargeable battery, receiver (e.g., wireless), transmitter (e.g., wireless), transceiver (e.g., wireless), and/or antenna  36 . In some embodiments, the earbud  64  further includes a balanced armature receiver or speaker or a diaphragm-based speaker for audio sound production. 
     In some embodiments, the body  70  of the earbud  64  further includes a button  80  for controlling the flow or streaming of audio through the earbud  64 , for example pausing, playing, forward skipping, and backward skipping, etc. In some embodiments, the button  80  may also function to initiate a phone call, receive an incoming phone call, disconnect an in-progress phone call, prompt the use of a virtual assistant associated with the mobile computing device  12 , adjust the volume, etc. 
     The microphone  82  functions to receive sounds waves, for example from a user speaking into an earbud  64 , and converts the sound waves into electrical energy (e.g., voltage, current, etc.) to be amplified and/or transmitted to another device, for example a case  10  or a mobile computing device  12 . 
     The antenna  36  and receiver (or antenna and transceiver) are configured to receive or intercept and amplify, respectively, wireless signals comprising data (e.g., audio) transmitted from a mobile computing device  12  and/or a case  10 . In some embodiments, these wireless signals may then be transmitted from the first wireless earbud  64   a  to a second wireless earbud  64   b , for example as shown in  FIGS. 17A-17B . Wireless communication between system components is described in further detail elsewhere herein. 
     In a wireless earbud  64 , the rechargeable battery (e.g., coin cell, cylindrical lithium ion, prismatic cell, etc.) allows the wireless earbud  64  to be used physically disconnected from a case  10  or a mobile computing device  12 . As described elsewhere herein, when the wireless earbud  64  is positioned in the case  10 , the battery of the wireless earbud  64  may be recharged. Also described elsewhere herein, a wireless earbud  64  may further include a watch battery, button cell, or single cell battery to elongate earbud battery life or to provide a reserve source for earbud battery life, for example to allow a user to locate a wireless earbud  64  physically disconnected from a case  10  or a mobile computing device  12 . 
     In some embodiments, a wireless earbud  64  may include one or more optical indicators (e.g., LED) to visually display a remaining battery life or power of the battery in the wireless earbud  64 , for example so that a user knows when he should position the earbud  64  in the case  10  to recharge the earbud  64 . Alternatively or additionally, a wireless earbud  64 , or another system component in wireless communication with the earbud  64  (e.g., case, mobile computing device, computing device, etc.), may automatically detect a remaining battery life or power of the battery and audibly (e.g., beep, warning with words from speaker in earbud, etc.), visually (e.g., blink, turn-off, etc. optical indicator), or haptically (e.g., vibrate) notify the user (e.g., by sending data packets) that he/she should position the earbud  64  in the case  10  for charging or that he/she has, for example, another hour of battery life remaining. 
     As shown in  FIGS. 2A-2F , and  FIGS. 3A-B , a wireless earbud  64  may further include a fin  68 . In some embodiments, the fin  68  is flexible to hook, secure, or fix the wireless earbud  64  in an ear of a user, as shown in  FIGS. 4A-4B . Alternatively, in some embodiments, the fin  68  is rigid, functions as microphone, and/or is positioned proximate an ear lobe of the user. Further, the fin  68  functions to align the earbud  64  with one or more earbud charging contacts  76  in the earbud cavity  34  of the case  10 , as described elsewhere herein. The fin  68  may include a flexible plastic, for example polyethylene terephthalate, high-density polyethylene, polyvinyl chloride, low-density polyethylene, polypropylene, polystyrene, or any other suitable flexible plastic known to one of skill in the relevant art. The fin  68  may vary in length, for example to fit an ear shape and/or size of the user. The fin  68  may appear truncated (fin  68   a  in  FIGS. 2A-2B ), transitional or of medium or intermediate length (fin  68   b  in  FIGS. 2C-2D ), elongate (fin  68   c  in  FIGS. 2E-2F ), or any size therebetween or larger or smaller to fit the size of ear of the user. In some embodiments, the earbud  64  does not include a fin  68 , as shown in  FIGS. 3C-3D . 
     As shown in  FIGS. 2A-2F , and  FIGS. 3C-3D , a wireless earbud  64  may further include a tip portion  72 . The tip portion  72  of the body  70  opposite the end of the body  70  comprising the fin  68  fits against an outer opening of the ear canal, as shown in  FIGS. 4A-4B . Tip portion  72  may appear small (tip portion  72   a  in  FIGS. 2A-2B ), intermediate (tip portion  72   b  in  FIGS. 2C-2D ), large (tip portion  72   c  in  FIGS. 2E-2F ), or any size therebetween or larger or smaller to fit the size of ear of the user. In some embodiments, the earbud  64  does not include a tip portion  72 , as shown in  FIGS. 3A-3B . In some embodiments, the fin  68  or tip portion  72  includes a microphone, rechargeable battery, receiver, transmitter, transceiver, and/or antenna  36 , as described elsewhere herein. In one embodiment, when positioned in the earbud cavity  34  in the top portion  20  of the case  10 , the tip portion  72  of the first earbud  64   a  is opposite and away from the tip portion  72  of the second earbud  64   b  and the fin  68  of the first earbud  64   a  is adjacent and in proximity to the fin  68  of the second earbud  64   b , as shown in  FIG. 13A . In some embodiments, at least a portion of the first and second wireless earbuds  64   a / 64   b  extends into the second housing  38  when the first and second wireless earbuds  64   a / 64   b  are positioned in the earbud cavity  34 . In one such embodiment, a fin  68  of the wireless earbud  64  extends into the second housing  38 . 
     In some embodiments, as shown in  FIGS. 5A-5C , one or more wireless earbuds  64  may be removed from an earbud cavity  34  in the case  10  and positioned in an earbud charging or storage device  83  or removed from an earbud charging or storage device  83  and positioned and/or charged in the case  10 . The earbud charging or storage device  83  functions to charge or simply store one or more wireless earbuds  64  when the one or more wireless earbuds  64  are not positioned in the case  10  and/or when a second top portion is being used, as described elsewhere herein. The earbud charging or storage device  83  may include or be formed of a housing  85 . The housing  85  may be formed of one monolithic shell or two or more sections that are reversibly coupled or irreversibly fastened. For example, as shown in  FIGS. 5B-5C , the housing  85  may include a first section  87  and a second section  89 . The first  87  and second  89  sections may be coupled via a snap fit connection, a screw-thread connection, via one or more retractable protrusions, or via any other mechanism known in the art. The housing  85  may include an earbud cavity  97 , similar to the earbud cavity  34  in a case  10 , as described elsewhere herein. One or more wireless earbuds  64  positioned in the housing  85  may be charged by a battery  93  disposed in the earbud charging or storage device  83 , similar to any embodiment of battery described elsewhere herein. In other embodiments, the earbud charging device  83  functions only as a storage device (i.e., does not include a battery) without any charging capacity; in some such embodiments, one or more wireless earbuds  64  positioned in the earbud charging or storage device  83  may be charged directly from an external power source, for example via a lightning cable or USB connecting the earbud charging or storage device  83  to a wall outlet. Alternatively or additionally, the earbud charging or storage device  83  may be connected to an external power source via port  91 . Port  91 , when connected to an external power source (e.g., via USB, lightning, etc.), may function to charge directly one or more wireless earbuds  64  disposed in the earbud charging or storage device  83  independently of a battery  93  or may charge indirectly one or more wireless earbuds  64  disposed in the earbud charging or storage device  83  by charging a battery  93  disposed in the earbud charging or storage device  83 . The earbud charging or storage device  83  may further include one or more optical indicators  95  (e.g., LED, OLED) on an external surface of the housing  85 . Such optical indicators  95  may indicate a charge of a battery  93  and/or one or more wireless earbuds  64  positioned in the earbud charging or storage device  83 . 
     In some embodiments, as shown in  FIGS. 16A-16D , a system for storing and charging one or more earbuds  64  includes a camera adapter  71 . The camera adapter  71  functions to adjust an angle, curvature, aperture, perspective, zoom, etc. of the camera in a mobile computing device  12  disposed in the case  10 , such that a variety of images may be captured by a user using the camera and the camera adapter  71 . The camera adapter  71  may include a lens  73 . Non-limiting examples of lenses  73  include: a standard lens, a macro lens, a wide angle lens, an ultra-wide angle lens, a fish-eye lens, a prime lens, a telephoto lens, a tilt lens, a shift lens, a soft-focus lens, an infrared lens, a zoom lens (e.g., zoom in lens, zoom out lens), any other type of lens, or any other type of lens with varying aperture size or speed. One of skill in the art will appreciate that any type of camera adapter  71  may be used with any of the embodiments described elsewhere herein, for example any of the embodiments described in  FIGS. 6D-6F . The camera adapter may be transitionable between a coupled state and a decoupled state. In the coupled state, as shown in  FIG. 16B , the camera adapter  71  is coupled to the case  10  over a camera aperture  24  of the case  10 . In a decoupled state, as shown in  FIG. 16A , the camera adapter  71  is unattached or decoupled from a camera aperture  24  of the case  10 . The camera adapter  71  may include one or more manipulatable protrusions  77  that function to reversibly secure the camera adapter  71  to the camera aperture  24  and the camera aperture  24  may include one or more depressions or grooves  79  that function to matingly receive the one or more manipulatable protrusions  77 . Alternatively, one or more manipulatable protrusions  77  may be on the case  10  and one or more depressions or grooves  79  may be on the camera adapter  24 . The camera adapter  24  or case  10  may further include a release  81  that functions to retract the one or more manipulatable protrusions  77  to secure the camera adapter  71  to the camera aperture  24  and to release or remove the camera adapter  71  from the camera aperture  24 . The release  81  may include a user input element. Non-limiting examples of user input elements include: a button, a switch, a toggle switch, a slider, or any other type of user input element. Alternatively, the camera adapter  71  may be reversibly secured to the camera aperture  24  by any suitable means, for example a snap-fit connection, screw-thread mechanism, or any other mechanism known in the art. In some embodiments, the camera adapter  71  is irreversibly secured to the camera aperture  24 , such that the case  10  is sold, marketed, packaged, sent, or otherwise transferred to a distributor, manufacturer, end user, supplier, store, etc. with the camera adapter  71  fastened to the case  10 . 
     In some embodiments, two or more system components may communicate wirelessly or transfer data wirelessly, as shown in  FIG. 17B ,  FIGS. 18A-18B , and  FIGS. 19A-19B . As shown in  FIG. 17B  and  FIGS. 18A-18B , the case  10  may include a receiver configured for receiving a wireless data transfer (also referred to as monophonic signal herein) from a computing device  74  ( FIG. 18B ) or a mobile computing device  12  ( FIG. 17B  or  FIG. 18A ) and a transmitter configured for transmitting the wireless data directly to at least the first wireless earbud  64   a . The wireless data transmission from a mobile computing device  12  or computing device  74  to the case  10  may occur via Bluetooth, low-energy Bluetooth, or any other RF technology. An antenna  36  of the case  10  may intercept the wireless data transmission and the receiver may amplify and modulate the wireless data. In some embodiments, as shown in  FIG. 17B , the transmitter of the case  10  may transmit the wireless data (for example using a monophonic signal) to a first wireless earbud  64   a  (i.e., the master), which then receives and transmits the wireless data to a second wireless earbud  64   b  (i.e., slave). 
     In some embodiments, as shown in  FIG. 18A , the transmitter of the case  10  may transmit wireless data directly to the first and second earbuds  64   a / 64   b  that includes information for both the first and second earbuds  64   a / 64   b . For example, the first and second earbuds  64   a / 64   b  may both receive and interpret the wireless data transmission directly from the case  10  but may only select the information or channel needed by or pertaining to the respective first or second earbud  64   a / 64   b.    
     In some embodiments, as shown in  FIGS. 17A-17B , the transmitter of the case  10  may transmit a plurality of wireless data transfers (also referred to as stereophonic signal herein) directly to each wireless earbud  64 . For example, in one embodiment, the transmitter of the case  10  may use frequency hopping spread-spectrum (i.e., scanning through a predetermined or random set of frequencies for wireless data delivery where the predetermined or random frequencies are known to both the transmitter in the case  10  and the receiver in each wireless earbud) to send the data directly to the first wireless earbud  64   a  and the second wireless earbud  64   b.    
     In one embodiment, the transmitter of the case  10  may use direct-sequence spread spectrum (i.e., using a wireless bandwidth for data transmission that is in excess of what is actually needed) to send the data directly to the first wireless earbud  64   a  and the second wireless earbud  64   b . In one embodiment, the first wireless earbud  64   a  receives the wireless data transmission at a first frequency and the second wireless earbud  64   b  receives the wireless data transmission at a second frequency, the first frequency being different from the second frequency. 
     In one embodiment, the transmitter of the case  10  may use quadrature amplitude modulation (i.e., the amplitude of at least two waves of the same frequency, out-of-phase with each other are changed to represent the data signal) to send the data directly to the first wireless earbud  64   a  and the second wireless earbud  64   b . In one embodiment, the first wireless earbud  64   a  receives the plurality of wireless data transfers at a first frequency, the first frequency comprising a first wave comprising a first amplitude: the second wireless earbud  64   b  receives the plurality of wireless data transfers at a second frequency, the second frequency comprising a second wave comprising a second amplitude. In some such embodiments, the first frequency and the second frequency are the same. 
     In one embodiment, as shown in  FIGS. 18A-18B , the transmitter of a mobile device  12  or computing device  74  transmits a plurality of wireless data transfers or stereophonic signals directly to the first wireless earbud  64   a  and the second wireless earbud  64   b  using, for example frequency hopping spread spectrum, direct-sequence spread spectrum, quadrature amplitude modulation or any other wireless technology or protocol known to one of skill in the relevant art, and the case  10  functions to charge the rechargeable battery in the first  64   a  and/or second wireless earbuds  64   b  when positioned in the case  10 , as shown in  FIGS. 18A-18B . 
     Further, in some embodiments, as shown in  FIGS. 17A-17B, 18A-18B , and,  19 A- 19 B by the bidirectional arrows, the first earbud  64   a  and/or second earbud  64   b  may send or transmit data back to the case  10 , computing device  74 , or mobile computing device  12 . In one embodiment, the second earbud  64   b  may send or transmit data back to the first earbud  64   a.    
     Methods 
     As shown in  FIG. 20 , a method  100  of wireless communication between system components includes receiving a wireless data transfer from a computing device S 110 ; transmitting, using a case, a plurality of wireless data transfers directly to a first wireless earbud and a second wireless earbud S 120 ; and, optionally, charging one or more wireless earbuds in the case S 130 . The method functions to transfer or transmit data (e.g., audio) between system components (e.g., linearly or bidirectionally), for example to allow a user to listen to audio in one or more wireless earbuds. The method is used in the field of the Internet of Things or entertainment, but can additionally or alternatively be used for any suitable applications, clinical, educational, musical, industrial, or otherwise. 
     In some embodiments, the case includes one transceiver (or transmitter) and antenna for transmitting the plurality of wireless data transfers to the first and second wireless earbuds. In some embodiments, the case includes a first transceiver (or first transmitter) and a first antenna dedicated to a first earbud and a second transceiver (or second transmitter) and a second antenna dedicated to a second earbud. In some embodiments, the case includes one antenna and transceiver (or receiver) for communicatively coupling to a mobile computing device or computing device (e.g., for monophonic data transmission) and a second antenna and transceiver (transmitter) for communicatively coupling to one or more earbuds (e.g., for stereophonic data transmission). 
     As shown in  FIG. 20 , one embodiment of a method  100  of wireless communication between system components includes block S 110 : receiving a wireless data transfer from a computing device. Block S 110  functions to acquire data from a computing device using an antenna, receiver, or transceiver disposed in a case. The data may be transmitted using a monophonic signal or a wireless data transfer from a computing device to a case, as described elsewhere herein. 
     As shown in  FIG. 20 , one embodiment of a method  100  of wireless communication between system components includes block S 120 : transmitting, using a case, a plurality of wireless data transfers directly to a first wireless earbud and a second wireless earbud. Block S 120  functions to avoid transmitted signal latency (e.g., discontinuity in audio versus visual representation of audio) and/or poor signal reception (e.g., signal dropping, audio cutting in and out) by transmitting the data directly to each wireless earbud using for example, frequency hopping spread spectrum, direct-sequence spread spectrum, quadrature amplitude modulation, or any other wireless technology or protocol known to one of skill in the relevant art. In some embodiments, the first wireless earbud receives the plurality of wireless data transfers at a first frequency and the second wireless earbud receives the plurality of wireless data transfers at a second frequency. In one embodiment, the first frequency is different than the second frequency. In one embodiment, the first and second frequencies are transmitted simultaneously to the first and second wireless earbuds, respectively. In one embodiment, the first and second frequencies are transmitted asynchronously to the first and second wireless earbuds, respectively. In one variation, the first and second frequencies vary over time. In another variation, the first and second frequencies are static over time. In some embodiments, the frequency of the data transfer received by the first and second wireless earbuds is the same but the amplitude of the wave received by the first and second wireless earbuds is different. 
     In some variations, as shown in  FIG. 20 , the method  100  optionally includes charging one or more wireless earbuds in the case. In some embodiments, methods  100  includes turning off a wireless signal emanating from the case when one or more wireless earbuds are positioned in the case or coupled to the case. 
     In some variations, the method  100  includes: providing a case and at least two wireless earbuds. The case is configured to receive the wireless data transfer from a computing device and the at least two wireless earbuds are configured to receive a plurality of wireless data transfers directly from the case. 
     In some variations, the method  100  includes: transmitting, using one or more wireless earbuds, a wireless data transfer or a plurality of wireless data transfers back to the case and/or computing device (e.g., mobile computing device). For example, the one or more earbuds may transmit microphone data or readings back to the case and/or computing device. As described herein, in some embodiments, method  100  functions to transfer data bidirectionally between system components. 
     As shown in  FIG. 21 , a method  200  of wireless communication between system components includes transmitting a plurality of wireless data transfers directly from a computing device to a first wireless earbud and a second wireless earbud S 210 ; receiving the plurality of wireless data transfers using the first wireless earbud and the second wireless earbud S 220 ; and, optionally, charging one or more wireless earbuds in a case S 230 . The method functions to transfer or transmit data (e.g., audio) between system components, for example to allow a user to listen to audio in one or more wireless earbuds. The method is used in the field of the Internet of Things or entertainment, but can additionally or alternatively be used for any suitable applications, clinical, educational, musical, industrial, or otherwise. 
     As shown in  FIG. 21 , one embodiment of a method  200  of wireless communication between system components includes block S 210 : transmitting a plurality of wireless data transfers directly from a computing device to a first wireless earbud and a second wireless earbud. The data may be transmitted using a stereophonic signal or a plurality of wireless data transfers directly from a computing device to two or more wireless earbuds, as described elsewhere herein. Block S 220  functions to avoid transmitted signal latency (e.g., discontinuity in audio versus visual representation of audio) and/or poor signal reception (e.g., signal dropping, audio cutting in and out) by transmitting the data directly to each wireless earbud using for example, frequency hopping spread spectrum, direct-sequence spread spectrum, quadrature amplitude modulation, or any other wireless technology or protocol known to one of skill in the relevant art. In some embodiments, the computing device includes one transceiver (or transmitter) and antenna for transmitting the plurality of wireless data transfers to the first and second wireless earbuds. In some embodiments, the computing device includes a first transceiver (or first transmitter) and a first antenna for transmitting to a first earbud and a second transceiver (or second transmitter) and a second antenna for transmitting to a second earbud. 
     In some embodiments, the first wireless earbud receives the plurality of wireless data transfers at a first frequency and the second wireless earbud receives the plurality of wireless data transfers at a second frequency. In one embodiment, the first frequency is different than the second frequency. In one embodiment, the first and second frequencies are transmitted simultaneously to the first and second wireless earbuds, respectively. In one embodiment, the first and second frequencies are transmitted asynchronously to the first and second wireless earbuds, respectively. In one variation, the first and second frequencies vary over time. In another variation, the first and second frequencies are static over time. In some embodiments, the frequency of the data transfer received by the first and second wireless earbuds is the same but the amplitude of the wave received by the first and second wireless earbuds is different. 
     As shown in  FIG. 21 , one embodiment of a method  200  of wireless communication between system components includes block S 220 : receiving the plurality of wireless data transfers using the first wireless earbud and the second wireless earbud. Block S 220  functions to acquire data wirelessly from a computing device using an antenna, receiver, or transceiver disposed in a wireless earbud. 
     In some variations, as shown in  FIG. 21 , the method  200  optionally includes charging one or more wireless earbuds in the case. In some embodiments, methods  200  includes turning off a wireless signal emanating from the computing device when one or more wireless earbuds are positioned in the case or coupled to the case. For example, when the one or more wireless earbuds are positioned in or coupled to the case, the earbuds may sense that they are being charged and may transmit a signal to the computing device to deactivate a wireless signal emanating from the computing device. 
     In some embodiments, the method  200  includes: providing a mobile computing device configured to transmit a plurality of wireless data transfers directly to two or more wireless earbuds. Alternatively or additionally, the method  200  includes: providing a case and at least two wireless earbuds. 
     As shown in  FIG. 22 , a method  300  for manipulation of data transfer modes includes providing a virtual or mechanical switch, wherein the switch is manipulatable between a high audio-visual synchronization mode and a high signal (e.g., data, information, audio, etc.) reception quality mode S 310 ; if a user desires high audio-visual synchronization, adjusting the switch to minimize a latency between packet transmission to an earbud or packet receipt by the earbud and time stamp of packet use (e.g., play audio) by the earbud S 320 ; and if a user desires high signal reception quality, adjusting the switch to increase the latency between packet transmission to an earbud and time stamp of packet use by the earbud S 330 . The method functions to enable a user to manipulate or control the balance between reduced dropouts (i.e., high signal reception quality) and reduced latency (i.e., high audio-visual synchronization), as described elsewhere herein. In some embodiments of method  300 , there may be a plurality of intermediate modes or settings in between high audio-visual synchronization on a first end of the spectrum and high signal reception quality on a second end of the spectrum. 
     As shown in  FIG. 22 , one embodiment of a method  300  for manipulation of data transfer modes includes block S 310 : providing a virtual or mechanical switch, wherein the switch is manipulatable between a high audio-visual synchronization mode and a high signal (e.g., data, information, audio, etc.) reception quality mode. Block S 310  functions to provide a means for a user to tailor his audio or audio-visual experience. A virtual switch may be provided to a user through a graphical user interface (GUI) in an application on a computing device (e.g., mobile computing device). The virtual switch may include: a button, slider, toggle button, toggle switch, switch, dropdown menu, combo box, text input field, check box, radio button, picker control, segmented control, stepper, and/or any other type of control. In some embodiments, the user may use different tactile or haptic lengths or pressures to navigate on the GUI and/or in the application. For example, a user may use a short press, long press, light press, or forceful press to indicate a mode preference. A mechanical switch may be provided to a user on a computing device or a case associated with the computing device. The mechanical switch may include: a button, joystick, slider, toggle switch, switch, or any other type of control. In some embodiments, a user&#39;s preferences are preconfigured in an application on the computing device, such that the computing device or an application on the computing device switches to a user&#39;s preferred mode upon sensing a user watching a video (e.g., high audio-visual synchronization mode) or only streaming audio (e.g., high signal reception quality mode). 
     As shown in  FIG. 22 , one embodiment of a method  300  for manipulation of data transfer modes includes block S 320 : if a user desires high audio-visual synchronization, adjusting the switch to minimize a latency between packet transmission to an earbud or packet receipt by the earbud and time stamp of packet use by the earbud. Block S 320  functions to decrease a perceived lag or latency between a visual event on a display of a computing device (e.g., lips forming words, explosion, car being turned on, etc.) and an audio event heard by a user in relation to the visual event (e.g., words being spoken, a sound of the explosion, sound of a car engine starting, etc.). As described elsewhere herein, if a packet (e.g., data, audio, etc.) is transmitted to an earbud or if an earbud receives a packet of information (e.g., data, audio, etc.) and a long time elapses before the time stamp occurs or passes (i.e., latency), the user may perceive a disconnect or lag between a visual event on the display and an audio event heard in relation to the visual event. Allowing a user to tune or adjust the latency period to minimize or elongate this latency period enables the user to achieve her desired audio-visual experience. In some embodiments, adjusting the switch occurs automatically, for example, upon the earbud, computing device, case, or other device sensing that the user is viewing a video, movie, or other combination of audio and visual, and automatically moving, adjusting, or manipulating the switch to achieve higher audio-visual synchronization. In some embodiments, adjusting the switch occurs manually, for example by a user, manufacturer, designer, etc. of the method. 
     In some embodiments, if the user is viewing a movie, video, or other audio-visual event indoors or in a semi or fully enclosed space, the user may not experience any dropouts due to the shortened latency between packet receipt and use (e.g., audio/video play). However, in some embodiments, if the user is viewing a movie, video, or other audio-visual event outdoors or in a semi or fully open environment, the user may experience one or more dropouts due to the shortened latency between packet transmission to the earbud or packet receipt by the earbud and packet use by the earbud. 
     As shown in  FIG. 22 , one embodiment of a method  300  for manipulation of data transfer modes includes block S 330 : if a user desires high signal reception quality, adjusting the switch to increase the latency between packet transmission to an earbud and time stamp of packet use by the earbud. Block S 330  functions to decrease poor signal reception or dropouts during audio streaming (e.g., music, podcast, etc.). As described elsewhere herein, if a packet (e.g., data, audio, etc.) is transmitted (e.g., by a mobile computing device, computing device, case, etc.) to an earbud and not enough time elapses before the time stamp occurs (i.e., time stamp passes without the earbud receiving the packet of information), the user may experience poor signal reception (i.e., one or more dropouts) in the audio. Allowing a user to tune or adjust the latency period to minimize the number of dropouts the user experiences enables the user to achieve his or her desired audio experience. In some embodiments, adjusting the switch occurs automatically, for example, upon the earbud, computing device, case, or other device sensing that the user is streaming audio, the switch is automatically moved, adjusted, or manipulated to achieve higher audio signal reception quality. In some embodiments, adjusting the switch occurs manually, for example by a user, manufacturer, designer, etc. of the method. 
     As used in the description and claims, the singular form “a”, “an” and “the” include both singular and plural references unless the context clearly dictates otherwise. For example, the term “sidewall” may include, and is contemplated to include, a plurality of sidewalls. At times, the claims and disclosure may include terms such as “a plurality,” “one or more,” or “at least one;” however, the absence of such terms is not intended to mean, and should not be interpreted to mean, that a plurality is not conceived. 
     The term “about” or “approximately,” when used before a numerical designation or range (e.g., to define a length or pressure), indicates approximations which may vary by (+) or (−) 5%, 1% or 0.1%. All numerical ranges provided herein are inclusive of the stated start and end numbers. The term “substantially” indicates mostly (i.e., greater than 50%) or essentially all of a device, substance, or composition. 
     As used herein, the term “comprising” or “comprises” is intended to mean that the systems and methods include the recited elements, and may additionally include any other elements. “Consisting essentially of” shall mean that the systems and methods include the recited elements and exclude other elements of essential significance to the combination for the stated purpose. Thus, a system or method consisting essentially of the elements as defined herein would not exclude other materials, features, or steps that do not materially affect the basic and novel characteristic(s) of the claimed invention. “Consisting of” shall mean that the systems and methods include the recited elements and exclude anything more than a trivial or inconsequential element or step. Embodiments defined by each of these transitional terms are within the scope of this disclosure. 
     The examples and illustrations included herein show, by way of illustration and not of limitation, specific embodiments in which the subject matter may be practiced. Other embodiments may be utilized and derived therefrom, such that structural and logical substitutions and changes may be made without departing from the scope of this disclosure. Such embodiments of the inventive subject matter may be referred to herein individually or collectively by the term “invention” merely for convenience and without intending to voluntarily limit the scope of this application to any single invention or inventive concept, if more than one is in fact disclosed. Thus, although specific embodiments have been illustrated and described herein, any arrangement calculated to achieve the same purpose may be substituted for the specific embodiments shown. This disclosure is intended to cover any and all adaptations or variations of various embodiments. Combinations of the above embodiments, and other embodiments not specifically described herein, will be apparent to those of skill in the art upon reviewing the above description.