Improved microphones for an implantable hearing aid

Details Improved microphones for an implantable hearing aid Improved microphones for an implantable hearing aid

H - Electricity

04

R

H04R 25/00 (2006.01) H04R 25/02 (2006.01)

Patent

CA 2479822

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

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