Improved microphones for an implantable hearing aid

H - Electricity – 04 – R

Patent

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Details

H04R 25/02 (2006.01) A61F 11/04 (2006.01) A61N 1/36 (2006.01) H04R 1/02 (2006.01) H04R 19/01 (2006.01) H04R 25/00 (2006.01)

Patent

CA 2256389

An implantable sealed microphone (50) includes a diaphragm (52) having a thin central region (54) surrounded by a thicker rim (56). One side of sheet electret material (72) is bonded to the diaphragm (52) while the other side contacts a roughened plate (82). The rim (56) is bonded to a housing (112) thereby hermetically enclosing the electret (72) and the plate (82). The microphone (50) also includes an electrical connector (94) that couples both the plate (82) and the electret (72) to an input of an amplifier (30) included in an implantable hearing aid system (10). Preferably, the microphone (50) is incorporated into a sealed electronics module (100) together with the amplifier (30) and an energy storage device such as a battery that energizes operation of the implantable hearing aid system (10). In such a configuration, the microphone's diaphragm (52) forms a surface of the electronics module's housing (112). An electrical connector (134) couples an output signal from the amplifier (30) to a microactuator (32) of the implantable hearing aid system (10).

Un microphone hermétique implantable (50) comprend une membrane (52) ayant une partie centrale mince (54) entourée d'un bord (56) plus épais. Un électret (72) présente un côté qui adhère à la membrane (52) et l'autre côté qui est en contact avec une plaque dépolie (82). Le bord (56) adhère à un boîtier (112) renfermant ainsi hermétiquement l'électret (72) et la plaque (82). Le microphone (50) comprend également un connecteur électrique (94) qui relie à la fois la plaque (82) et l'électret (72) à l'entrée d'un amplificateur (30) intégré à un appareil de correction auditive implantable (10). De préférence, le microphone (50) est incorporé dans un module électronique hermétique (100), ainsi que l'amplificateur (30) et un accumulateur d'énergie, par exemple une pile, qui alimente l'appareil de correction auditive implantable (10). Dans une telle configuration, la membrane du microphone (52) forme une face du boîtier (112) contenant le module électronique. Un connecteur électrique (134) relie un signal de sortie de l'amplificateur (30) à un microactionneur (32) de l'appareil de correction auditive implantable (10).

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