Attenuating means for electroacoustic transducer

Details Attenuating means for electroacoustic transducer Attenuating means for electroacoustic transducer

1979-07-03

1981-09-29

Budd, Mark O.

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

179180, 179110A, 310326, 310324, H01L 4108

Patent

active

042925614

ABSTRACT:
An electroacoustic transducer in which resonance ratio effects above 3500 Hz are attenuated by acoustic means, wherein the transducer membrane is disposed in a cavity which is sub-divided thereby, the sound-receiving space at the front side of the membrane being sub-divided by a separation plate having acoustic transmission openings therein, a mounting cap forming the front wall of said sound-receiving space and provided with acoustic transmission openings therein, and an attenuation member disposed between the separation disk and the mounting cap, which forms a low-pass filter for sound traveling to said membrane. The invention has particular application in piezo microphones in telephone technology.

REFERENCES:
patent: 2645301 (1953-07-01), De Vries
patent: 3708702 (1973-01-01), Brunnert

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