Electret microphone

Details Electret microphone Electret microphone

H - Electricity

04

R

349/66

H04R 19/01 (2006.01) H04R 1/06 (2006.01) H04R 7/20 (2006.01)

Patent

CA 1240032

ABSTRACT OF THE DISCLOSURE An electret microphone comprises a rectangular metal electrode, a metallized electret film and an amplifier ele- ment encapsulated in a lower and an upper casing half. A contact element comprises a flat web portion and two prongs which are provided with tubes of electrically conductive silicon rubber. In the assembled microphone the electret film is retained by the tubes which simultaneously provide electri- cal contact between the film and the amplifier element.

458986

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