Electret microphone

Details Electret microphone Electret microphone

1979-08-15

1981-05-19

Robinson, Thomas A.

179110A, H04R 1904

Patent

active

042687250

ABSTRACT:
An electret microphone in which an electret diaphragm, a back electrode plate disposed opposite thereto and a tubular back electrode holder for holding the back electrode plate are housed in a capsule, an impedance conversion element is housed in a hole made in the peripheral wall of the back electrode holder, and an input terminal of the impedance conversion element is connected to the back electrode plate and an output terminal is led out of the capsule through a notch formed in its peripheral wall.

REFERENCES:
patent: Re28420 (1975-05-01), Murphy
patent: 4063049 (1977-12-01), Pipitone et al.
patent: 4081628 (1978-03-01), Neusel

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