Frequency-selective sound transducer

Details Frequency-selective sound transducer Frequency-selective sound transducer

1988-08-19

1989-12-05

Ng, Jin F.

Electrical audio signal processing systems and devices

Electro-acoustic audio transducer

310324, 381190, 381203, H04R 128, H04R 1700, H04R 1710, H01L 4108

Patent

active

048857815

ABSTRACT:
A frequency-selective sound transducer comprised of a number of resonators with differing but sequential natural frequencies arranged in a first plane. A deformable membrane is arranged in a second plane, parallel to the first plane and in close proximity thereto. A small air gap thus exists between the first and second planes. Sound waves produce vibratory motion in the membrane, which motion is transmitted to the resonators by pressure waves generated by the membrane in the air between the membrane and resonators. The deflections of the resonators are converted into electrical signals.

REFERENCES:
patent: 3568108 (1971-03-01), Poirier
patent: 3947708 (1976-03-01), Fulenwider
patent: 3983518 (1976-09-01), Bezemer
patent: 4075600 (1978-02-01), Sims et al.
patent: 4517486 (1985-05-01), Andrews
patent: 4751419 (1988-06-01), Takahata
patent: 4783821 (1988-11-01), Muller et al.
IEEE Proceedings of the International Conference on Solid State Sensors and Actuators-Transducers, "A Frequency Selective, Piezoresistive Silicon Vibration Sensor", W. Beneke et al., 1985, pp. 105-108.

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