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Electret microphone assembly

  • US 4,443,666 A
  • Filed: 11/24/1980
  • Issued: 04/17/1984
  • Est. Priority Date: 11/24/1980
  • Status: Expired due to Term
First Claim
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1. A microphone including in combination a housing having an opening formed therein, an insulating support having a back and a front, said support having an enclosed portion contained in said housing and an exposed portion extending out of said housing through said opening, an electrode formed on the front of said enclosed portion, a conductive diaphragm spaced in front of said electrode, an electret disposed between said electrode and said diaphragm, an amplifier circuit carried on the back of said enclosed portion, said amplifier having an input and an output, means forming an electrical contact on the exposed portion of said support, means coupling said electrode to said input, and means coupling said output to said electrical contact.

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