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Microphones for an implantable hearing aid

  • US 5,881,158 A
  • Filed: 05/23/1997
  • Issued: 03/09/1999
  • Est. Priority Date: 05/24/1996
  • Status: Expired due to Term
First Claim
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1. A sealed microphone adapted for inclusion in an implantable hearing aid system to provide an input signal to an amplifier included in the implantable hearing aid system, the microphone comprising:

  • a diaphragm having a thin central region surrounded by a thicker rim;

    an electret bonded to said diaphragm;

    a roughened plate contacted by said electret;

    a housing for receiving said plate and said electret, said housing being electrically insulated from said plate, the rim of said diaphragm being bonded to a surface of said housing thereby hermetically sealing the microphone; and

    an electrical connector coupled both to said plate and said electret for providing the input signal to the amplifier of the implantable hearing aid system.

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