Ear-wearable hearing device and ear-wearable hearing device subassembly

Abstract

The utility model provides an ear -wearing hearing device and ear -wearing hearing device subassembly. Disclose a kind of hearing device, and hearing device includes sound tube being configured for wearing on user's outer ear or at least partially wearing in user's ear canal. Hearing device includes: loudspeaker, the loudspeaker has the sound outlet of the opening that is acoustically coupled to sound tube by loudspeaker sound path;And microphone, which is mounted on a carrier. The microphone includes a manifold that forms a microphone sound path acoustically coupling the microphone to the opening of the sound tube, wherein the manifold isolates the microphone sound path from the loudspeaker sound path along at least a portion of the passage of the sound tube.

Description

Technical Field

[0001] This disclosure relates generally to ear-worn hearing devices, and more specifically to ear-worn hearing devices including speakers and in-ear microphones, as well as sub-components and parts for such hearing devices. Background Technology

[0002] Some ear-worn hearing devices include a speaker housed within a housing with a sound hole configured for at least partial insertion into the user's ear canal. One such device is an in-ear receiver (RIC) hearing aid. Advances in audio signal processing, miniaturization, power consumption reduction, and cost reduction have led to the increasing adoption of active noise cancellation (ANC) and other audio enhancement features in ear-worn hearing devices. These audio enhancement features benefit from microphones capable of sensing the conditions inside the user's ear. Therefore, the speaker's sound path can interfere with the microphone's sound path. Moreover, proper integration of these and other components with the hearing device is difficult, and improper assembly can lead to performance problems and increased costs. Therefore, there is a continuous need for improved ear-worn hearing devices, sub-components, and their components. Utility Model Content

[0003] A first aspect of this disclosure relates to an ear-worn hearing device comprising: a sound tube configured to be worn on a user's outer ear or at least partially in a user's ear canal, the sound tube including a channel extending into an opening of the sound tube; a speaker including a sound outlet acoustically coupled to the opening of the sound tube via a speaker sound path; a carrier including an interface portion capable of being inserted into the channel of the sound tube; and a microphone assembled with the carrier and acoustically coupled to the opening of the sound tube via a microphone sound path; wherein, when the interface portion of the carrier is inserted into the channel, the microphone is positioned within the channel of the sound tube.

[0004] In one embodiment, the microphone is located within the channel of the sound tube and between the opening of the sound tube and the speaker.

[0005] In one embodiment, the carrier further includes a frame that is at least partially secured around the periphery of the acoustic mesh, and the interface portion includes an arm that is integrated with the frame and extends from the acoustic mesh into a receiving portion of the acoustic tube, wherein the acoustic mesh covers the opening of the acoustic tube when the arm of the carrier is inserted into the channel.

[0006] In one embodiment, the ear-worn hearing device further includes a manifold covering the sound port of the microphone, the sound channel of the manifold forming at least a portion of the microphone sound path, wherein the manifold isolates the microphone sound path from the speaker sound path along at least a portion of the channel of the sound tube.

[0007] In one embodiment, the manifold extends to the opening of the acoustic tube.

[0008] In one embodiment, the microphone includes a microphone housing with an electrical interface, the sound port extending through the microphone housing, and the manifold fastened to the housing above the sound port.

[0009] In one embodiment, the microphone includes a microelectromechanical system (MEMS) transducer and circuitry disposed in the microphone housing, the circuitry being electrically connected to the MEMS transducer and the electrical interface, wherein the direction of the microphone's sound port is not parallel to the direction of the manifold's sound channel.

[0010] A second aspect of this disclosure relates to an ear-worn hearing device comprising: a housing including a sound tube configured for at least partial insertion into a user's ear canal, the sound tube including a channel extending into an opening of the sound tube; a speaker disposed in the housing and including a sound outlet acoustically coupled to the opening of the sound tube via a speaker sound path extending through the channel of the sound tube; a carrier including a frame at least partially fastened around a periphery of an acoustically transparent mesh; and a microphone assembled with the carrier and including a manifold covering a sound port acoustically coupled to the opening of the sound tube via a microphone sound path extending through the manifold, wherein the acoustically transparent mesh covers the opening of the sound tube, and the microphone is positioned within the channel of the sound tube when an interface portion of the carrier is inserted into the channel.

[0011] In one embodiment, the manifold includes an acoustic channel between the sound port of the microphone and the opening of the manifold, wherein the manifold isolates the microphone sound path from the speaker sound path along at least a portion of the channel of the acoustic tube.

[0012] In one embodiment, the manifold extends to the opening of the acoustic tube.

[0013] In one embodiment, the interface portion of the carrier includes an arm integrated with the frame and extending away from the acoustic mesh into the receiving portion of the acoustic tube, wherein the interface portion positions the carrier relative to the acoustic tube.

[0014] In one embodiment, the microphone includes a microphone housing with an electrical interface, the sound port extending through the microphone housing, and the manifold fastened to the housing above the sound port.

[0015] In one embodiment, the manifold is secured to the microphone above the sound port, and the direction of the sound port is not parallel to the direction of the sound channel of the manifold.

[0016] In one embodiment, the microphone includes a microelectromechanical system (MEMS) transducer and circuitry disposed in the microphone housing, the circuitry being electrically connected to the MEMS transducer and the electrical interface.

[0017] In one embodiment, the ear-worn hearing device further includes a second microphone disposed within the housing and acoustically coupled to the outside of the housing.

[0018] In one embodiment, the ear-worn hearing device is an in-ear receiver unit, the in-ear receiver unit further including a cable having a first end and a second end, the first end being electrically connected to an electrical component of the in-ear receiver unit, and the second end including an electrical connector.

[0019] A third aspect of this disclosure relates to an ear-worn hearing device subassembly for an in-ear receiver hearing device, the ear-worn hearing device subassembly including a speaker disposed in a housing having a sound tube configured for at least partial insertion into a user's ear canal, the ear-worn hearing device subassembly including: a carrier including a frame and an interface portion at least partially fastened around the periphery of an acoustically transparent mesh; and a microphone including a manifold disposed above the sound port of the microphone, the microphone being mounted on the interface portion of the carrier, wherein the acoustically transparent mesh covers the sound opening of the sound tube, the microphone is positioned in the channel of the sound tube, and when the carrier is assembled with the in-ear receiver hearing device, the manifold at least partially isolates the sound path of the microphone from the sound path of the speaker.

[0020] In one embodiment, the interface portion of the carrier includes an arm integrated with the frame and extending away from the acoustic mesh, wherein the arm is capable of extending into the receiving portion of the acoustic tube when the carrier is assembled with the in-ear receiver hearing device.

[0021] In one embodiment, the microphone includes a microphone housing with an electrical interface, an audio port of the microphone extending through the microphone housing, and a manifold fastened to the housing above the audio port.

[0022] In one embodiment, the microphone includes a microelectromechanical system (MEMS) transducer and circuitry disposed in the microphone housing, the circuitry being electrically connected to the MEMS transducer and the electrical interface, wherein the direction of the microphone's sound port is not parallel to the direction of the manifold's sound channel.

[0023] In one embodiment, the ear-worn hearing device sub-assembly further includes a second microphone disposed within the housing, and acoustically coupled to the exterior of the housing exposed to the user's ear when the hearing device is worn by the user. Attached Figure Description

[0024] The objects, features, and advantages of this disclosure will become more fully apparent when considered in conjunction with the following detailed description and appended claims. The accompanying drawings depict only representative embodiments and implementations and are not intended to limit the teachings of this disclosure, the scope of which is set forth in the appended claims.

[0025] Figure 1 It is a representative ear-worn hearing device, which includes an ear-worn unit connected to a base unit via a cable.

[0026] Figure 2 This is a partial cross-sectional view of a representative ear-worn hearing device, including the carrier supporting a microphone with a manifold.

[0027] Figure 3 It is a three-dimensional image of a representative carrier.

[0028] Figure 4 This is an exploded view of a representative microphone and manifold assembly.

[0029] Figure 5 This is a cross-sectional view of a representative microphone and manifold assembly.

[0030] Figure 6 It is along Figure 2 A sectional view of line aa.

[0031] Those skilled in the art will understand that the accompanying drawings are for simplicity and clarity and therefore may not be drawn to scale and may not include well-known features. The order in which actions or steps occur may differ from the order described. Unless otherwise specified, some or all of these actions or steps may be performed simultaneously. The terms and expressions used herein have the meanings understood by those skilled in the art, unless specifically assigned different meanings. Detailed Implementation

[0032] This disclosure generally relates to ear-worn hearing devices and hearing device sub-assemblies including speakers and in-ear microphones, as well as components for hearing devices. Such hearing devices include, but are not limited to, in-ear receiver (RIC) devices, in-ear (ITE) devices, in-ear (ITC) devices, and true wireless stereo (TWS) devices, as well as other headphones and hearing devices worn on a user's outer ear or at least partially in a user's ear canal. Representative implementations are described herein.

[0033] Figure 1 A representative example is an ear-worn hearing device 100, which includes an ear-worn unit 110 connected to a base unit 120 via a cable 130. The cable includes: a first end connected to an interface 140 of the ear-worn unit; and a second end including a connector releasably or permanently connected to the base unit. The first end of the cable is electrically connected to one or more electrical components (e.g., a speaker or sensor) of the ear-worn unit. The second end of the cable is electrically connected to or can be connected to electrical components (e.g., a processor or other circuitry) of the base unit. The ear-worn unit alone or in combination with the cable 130 is also referred to herein as an "in-canal receiver (RIC) unit" or a "speaker assembly." A flexible earcup 114 may be connected to a ribbed acoustic tube to at least partially support the ear-worn unit within the user's ear canal.

[0034] Ear-worn units typically include one or more speakers that generate sound in response to an electro-audio signal provided by a base unit. The one or more speakers can be balanced armature receivers (also referred to herein as “receivers”) or dynamic speakers, or a combination thereof. A receiver typically includes: a diaphragm that divides the interior of the speaker housing into a rear cavity volume and a front cavity volume including a sound outlet; and a motor that includes an armature having a movable end connected to the diaphragm. Receivers are also referred to as balanced armature speakers because the armature moves relative to a fixed coil. In a dynamic speaker (also called a moving coil speaker), the coil is coupled to the diaphragm and moves with the diaphragm. Receivers have a relatively small size and efficiency, making them particularly suitable for hearing devices configured to be worn in or partially in a user's ear canal (e.g., RIC devices and ITC devices). Hearing devices configured to be worn in the outer ear typically have more space to accommodate multiple receivers and dynamic speakers.

[0035] exist Figure 1 In this design, a representative base unit 120 (also referred to herein as a behind-the-ear (BTE) unit or component) is configured to be worn behind a user's ear. Alternatively, the base unit may be configured to be worn on or around other body parts, such as the head, neck, or arm. The base unit typically includes a processor and other circuitry, one or more microphones, and a battery. In addition to other circuitry and components, the base unit may also include a wireless transceiver. With this configuration, the base unit can detect acoustic signals and, in response to the detection of acoustic signals, generate and process (e.g., suppress noise, amplify sound, etc.) electro-audio signals generated by one or more microphones. The electro-audio signals are transmitted to the ear-worn unit 110 via cable 130.

[0036] In other ear-worn hearing devices, the components and functions of the ear-worn unit and base unit described herein are integrated into a single ear-worn hearing device. Such hearing devices can be implemented as ITE, ITC, and TWS devices, as well as other headphones and devices configured to be worn on the outer ear or at least partially in the user's ear canal. These and other ear-worn hearing devices may or may not include flexible earcups. More generally, the configuration of an ear-worn hearing device, and the configuration of its speakers, microphones, or other sensors, depends on whether the device is configured to be worn on the outer ear, partially in the user's ear canal, or more completely in the user's ear canal.

[0037] One or more speakers are at least partially disposed within the housing of the hearing device, the housing including a sound tube configured to be worn on the user's outer ear or at least partially within the user's ear canal. Figure 1 and Figure 2 In this embodiment, the loudspeaker is completely enclosed by a housing. In other embodiments, the exposed portion of the loudspeaker housing may be the exterior of the hearing device. In any case, the sound outlets of one or more loudspeakers are acoustically connected to the opening of the sound tube via a loudspeaker sound path extending through a channel passing through the sound tube. Figure 2 In this example, a representative ear-worn hearing device 100 includes a receiver 116 at least partially disposed within a hearing device housing 112, which has a sound tube 203 configured for at least partial insertion into a user's ear canal. For hearing devices configured to be worn on the outer ear, the sound tube may include a flatter lobe or other shaped portion facing the user's ear. The sound tube includes a channel terminating at an opening 207. A speaker sound path 205 extends between a speaker sound outlet 117 and the opening 207 of the sound tube.

[0038] Ear-worn hearing devices also include a microphone (“in-ear microphone”) positioned to detect sound in the user’s ear. The microphone is acoustically connected to an opening in the sound tube via a microphone sound path, as further described herein. Figure 2 and Figure 6 In this configuration, microphone 210 is positioned within the channel of sound tube 203 between the opening 207 of the sound tube and one or more speakers. Figure 2 In this configuration, a flexible circuit or other conductor 211 connects the microphone 210 to the electrical interface or other circuitry of the hearing device. Additional sensors may also be integrated with the hearing device. Figure 2 In this hearing device housing 112, a second microphone 236 is acoustically coupled to a sound opening 113 for detecting sounds originating from outside the user's ear. In some hearing devices, the microphone for detecting sounds outside the ear may be integrated with a BTE unit, either in place of a speaker unit or in addition to a speaker unit, as described herein. In other implementations, an additional sensor may be a vibration sensor positioned to detect vibrations propagating through the user's body. Vibration sensors integrated with ear-worn hearing devices do not require a sound port.

[0039] Ear-worn hearing devices that include in-ear acoustic sensors can provide enhanced audio performance. In-ear microphones can be used alone or in combination with another microphone or sensor to detect ambient sound and improve noise reduction and blockage. In-ear microphones can also be used as probes to obtain real-ear coupled-cavity difference (RECD) measurements for custom hearing device fittings and other applications. In-ear vibration sensors can be used to detect speech from the user of the hearing device. This speech detection can be used for ANC and other audio enhancement features.

[0040] exist Figure 2In this assembly, microphone 210 is assembled with carrier 212, which includes an interface portion disposed within the channel of sound tube 203. The interface portion supports the microphone and positions the carrier within the channel of the sound tube. Figure 3 In this embodiment, representative carrier 212 includes an arm 216 on which a microphone can be mounted. Alternatively, the carrier may include at least a single arm or frame on which the microphone is mounted, wherein one or more arms or frames can be inserted into a complementary receptacle of the acoustic tube channel. Figure 6 In this configuration, when the carrier is assembled with the sound tube, the arm is positioned in a corresponding recess or receiving portion 218 within the sound tube channel. The recess or receiving portion positions and guides the carrier into the sound tube channel during assembly. The microphone can be secured to the carrier using glue, heat fusion, or some other fastening mechanism. In this configuration, the microphone and carrier form a sub-assembly that can be disposed within the channel of the sound tube, such as... Figure 2 and Figure 6 As shown, this facilitates the integration of the carrier and microphone subassemblies with the sound tube.

[0041] exist Figure 3 In this configuration, the carrier optionally includes a sound-permeable mesh 214 for reducing the entry of contaminants and a frame 217 at least partially secured around the periphery of the sound-permeable mesh 214. An arm 216 is integrated with the frame and extends away from the sound-permeable mesh. Figure 2 In this configuration, a frame is positioned on a portion of the sound tube to position the acoustic mesh above the channel opening and the microphone within the sound tube. The frame provides additional support for the acoustic mesh, facilitates handling and positioning of the mesh during assembly, and provides a larger surface area for contact with the sound tube. The frame and acoustic mesh can be formed as a single molded component. Alternatively, the frame can be molded above the acoustic mesh, or the acoustic mesh can be inserted into the frame to accommodate different materials or stiffness. In the absence of a carrier frame, a rear wall portion or stop in the recess or receiving section can prevent the carrier and microphone subassemblies from being inserted into the channel to ensure proper positioning within them.

[0042] The microphone's sound path extends through the passageway of the acoustic tube and acoustically connects the microphone's sound port to the opening of the acoustic tube. Figure 2 In this configuration, the microphone sound path acoustically connects the microphone 210 and the opening 207 of the sound tube. The manifold 220 connected to the microphone includes a sound channel 221 between the microphone's sound port and the manifold opening, as further described herein. The sound channel 221 of the manifold forms at least a portion of the microphone sound path. The outer edge of the manifold forms the boundary between the speaker sound path and the microphone sound path. Figure 2In this configuration, the manifold's sound path extends fully into the opening of the sound tube to maximize the separation of the microphone and speaker sound paths. Alternatively, the speaker and microphone sound paths can be partially separated by a partition in the sound tube's passage near the opening. The manifold's sound path extends into the partition. Isolating the microphone and speaker sound paths along at least a portion of the sound tube passage reduces unwanted feedback and other adverse effects caused by the mixing of microphone and speaker signals.

[0043] exist Figure 4 and Figure 5 In this example, the representative microphone 210 includes a manifold 220 fastened to the outside of the microphone and covering the microphone's sound port 222. The manifold includes a sound channel 221 between the microphone's sound port 222 and the manifold's opening 224, such as... Figure 5 As best shown in the image. The manifold can be fastened to the microphone to form a sub-assembly for easy integration with the carrier.

[0044] A typical microphone includes a transducer and circuitry housed in a housing with an external interface. Figure 4 and Figure 5 In the microphone 210, a housing includes a cover 226 mounted on a base 228. A manifold 220 is mounted on the base 228 and can be secured to the base 228 by glue, welding, or some other fastening mechanism. A transducer 230 disposed in the housing is mounted on the base above a sound port 222. A typical transducer is a capacitive device including a diaphragm movable relative to a fixed backplate. Alternatively, the transducer may be a piezoelectric transducer device or other transducer devices. These transducers and other transducers may be microelectromechanical systems (MEMS) devices. A circuit 232, also disposed in the housing, is electrically connected to the transducer and... Figure 4 The electrical interface 234 of the housing is shown. Figure 4 and Figure 5 In this implementation, the direction of the audio port 222 is not parallel to the direction of the audio channel 221 of the manifold. The direction of the audio port refers to the primary direction in which sound enters the microphone housing. In other implementations, depending on the type and configuration of the microphone, the direction of the audio port may be at least partially aligned with the direction of the audio port.

[0045] Although this disclosure and its best mode have been described in a manner that establishes ownership and enables those skilled in the art to make and use it, and which is hereby considered to be the best mode thereof, it should be understood and recognized that there are many equivalents of the representative embodiments described herein, and numerous modifications and variations may be made thereto without departing from the scope and spirit of the present invention, which is not limited to the described embodiments but is limited by the appended claims and their equivalents.

Claims

1. An ear-worn hearing device, characterized in that, The ear-worn hearing device includes: A vocal tube configured to be worn on a user's outer ear or at least partially in a user's ear canal, the vocal tube including a channel extending into an opening of the vocal tube; A loudspeaker, the loudspeaker including a sound outlet, the sound outlet being acoustically connected to the opening of the sound tube via a loudspeaker sound path; A carrier, the carrier including an interface portion capable of being inserted into the channel of the sound tube; A microphone, which is assembled with the carrier and acoustically connected to the opening of the sound tube via a microphone sound path; When the interface portion of the carrier is inserted into the channel, the microphone is positioned within the channel of the sound tube.

2. The ear-worn hearing device according to claim 1, characterized in that, The microphone is located within the channel of the sound tube and between the opening of the sound tube and the speaker.

3. The ear-worn hearing device according to claim 1, characterized in that, The carrier further includes a frame that is at least partially secured around the periphery of the acoustic mesh, and the interface portion includes an arm that is integrated with the frame and extends from the acoustic mesh into the receiving portion of the acoustic tube, wherein the acoustic mesh covers the opening of the acoustic tube when the arm of the carrier is inserted into the channel.

4. The ear-worn hearing device according to claim 1, characterized in that, The ear-worn hearing device further includes a manifold covering the sound port of the microphone, the sound channel of the manifold forming at least a portion of the microphone sound path, wherein the manifold isolates the microphone sound path from the speaker sound path along at least a portion of the channel of the sound tube.

5. The ear-worn hearing device according to claim 4, characterized in that, The manifold extends into the opening of the acoustic tube.

6. The ear-worn hearing device according to claim 4, characterized in that, The microphone includes a microphone housing with an electrical interface, the sound port extending through the microphone housing, and the manifold fastened to the housing above the sound port.

7. The ear-worn hearing device according to claim 6, characterized in that, The microphone includes a microelectromechanical system (MEMS) transducer and circuitry disposed in the microphone housing. The circuitry is electrically connected to the MEMS transducer and the electrical interface, wherein the direction of the microphone's sound port is not parallel to the direction of the manifold's sound channel.

8. An ear-worn hearing device, characterized in that, The ear-worn hearing device includes: A housing, the housing including a sound tube configured for at least partial insertion into a user's ear canal, the sound tube including a channel extending into an opening of the sound tube; A loudspeaker, the loudspeaker being disposed within the housing and including a sound outlet, the sound outlet being acoustically coupled to the opening of the sound tube via a loudspeaker sound path extending through the channel of the sound tube; The carrier includes a frame that is at least partially fastened around the periphery of the acoustically transparent mesh; A microphone, assembled with the carrier and including a manifold covering a sound port acoustically connected to the opening of the sound tube via a microphone sound path extending through the manifold. The acoustic mesh covers the opening of the acoustic tube, and the microphone is positioned in the channel of the acoustic tube when the interface portion of the carrier is inserted into the channel.

9. The ear-worn hearing device according to claim 8, characterized in that, The manifold includes a sound channel between the sound port of the microphone and the opening of the manifold, wherein the manifold isolates the microphone sound path from the speaker sound path along at least a portion of the channel of the sound tube.

10. The ear-worn hearing device according to claim 9, characterized in that, The manifold extends into the opening of the acoustic tube.

11. The ear-worn hearing device according to claim 10, characterized in that, The interface portion of the carrier includes an arm integrated with the frame and extending away from the acoustic mesh into the receiving portion of the acoustic tube, wherein the interface portion positions the carrier relative to the acoustic tube.

12. The ear-worn hearing device according to claim 11, characterized in that, The microphone includes a microphone housing with an electrical interface, the sound port extending through the microphone housing, and the manifold fastened to the housing above the sound port.

13. The ear-worn hearing device according to claim 12, characterized in that, The manifold is fastened to the microphone above the sound port, and the direction of the sound port is not parallel to the direction of the sound channel of the manifold.

14. The ear-worn hearing device according to claim 13, characterized in that, The microphone includes a microelectromechanical system (MEMS) transducer and circuitry disposed in the microphone housing, the circuitry being electrically connected to the MEMS transducer and the electrical interface.

15. The ear-worn hearing device according to claim 8, characterized in that, The ear-worn hearing device further includes a second microphone disposed within the housing and acoustically coupled to the outside of the housing.

16. The ear-worn hearing device according to claim 14, characterized in that, The ear-worn hearing device is an in-ear receiver unit, which further includes a cable having a first end and a second end, the first end being electrically connected to an electrical component of the in-ear receiver unit, and the second end including an electrical connector.

17. A sub-assembly for an ear-worn hearing device, the ear-worn hearing device sub-assembly being used in an in-ear canal receiver hearing device, characterized in that, The ear-worn hearing device subassembly includes a speaker disposed in a housing having a sound tube configured for at least partial insertion into a user's ear canal, the ear-worn hearing device subassembly including: The carrier includes a frame and an interface portion that are at least partially fastened around the periphery of the acoustically transparent mesh; and A microphone, the microphone including a manifold disposed above the microphone's sound port, the microphone being mounted on the interface portion of the carrier. The sound-permeable mesh covers the sound opening of the sound tube, the microphone is positioned in the channel of the sound tube, and when the carrier is assembled with the in-ear receiver hearing device, the manifold at least partially isolates the sound path of the microphone from the sound path of the speaker.

18. The ear-worn hearing device sub-assembly according to claim 17, characterized in that, The interface portion of the carrier includes an arm integrated with the frame and extending away from the acoustic mesh, wherein the arm is capable of extending into the receiving portion of the acoustic tube when the carrier is assembled with the in-ear receiver hearing device.

19. The ear-worn hearing device sub-assembly according to claim 18, characterized in that, The microphone includes a microphone housing with an electrical interface, an audio port of the microphone extending through the microphone housing, and a manifold fastened to the housing above the audio port.

20. The ear-worn hearing device sub-assembly according to claim 19, characterized in that, The microphone includes a microelectromechanical system (MEMS) transducer and circuitry disposed in the microphone housing. The circuitry is electrically connected to the MEMS transducer and the electrical interface. The direction of the microphone's sound port is not parallel to the direction of the manifold's sound channel.

21. The ear-worn hearing device sub-assembly according to claim 17, characterized in that, The ear-worn hearing device sub-assembly further includes a second microphone disposed within the housing, and acoustically coupled to the exterior of the housing exposed to the user's ear when the hearing device is worn by the user.

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