Electrostatic transducer

Details Electrostatic transducer Electrostatic transducer

1987-12-04

1989-01-10

Moskowitz, Nelson

Acoustics

Wave generation

181165, 181171, 340391, H04R 1900

Patent

active

047967250

ABSTRACT:
An electrostatic transducer which includes a vibrating membrane provided between a fixed electrode and a movable electrode to which electric signals are applied. The transducer further includes a plurality of depressions provided concentrically with a center of the fixed electrode in a surface of the fixed electrode which is in contact with the vibrating membrane and a plurality of through openings corresponding with the plurality of depressions further provided in the fixed electrode whereby the resonant frequency of the electrostatic transducer is reduced and the conversion efficiency of electric signals to sound pressure is increased.

REFERENCES:
patent: 3190972 (1965-06-01), Schoeps et al.
patent: 3908098 (1975-09-01), Kawakami et al.
patent: 3958662 (1976-05-01), Brzezinski et al.
patent: 4081626 (1978-03-01), Muggli et al.
patent: 4085297 (1978-04-01), Paglia
patent: 4321432 (1982-03-01), Matsutani et al.
patent: 4418246 (1983-11-01), Sawyer

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