Microphone with vibration cancellation

Details Microphone with vibration cancellation Microphone with vibration cancellation

1981-07-17

1984-04-10

Rubinson, G. Z.

Electrical audio signal processing systems and devices

Hearing aids, electrical

Specified casing or housing

381 94, 381 95, 179111E, H04R 102

Patent

active

044423233

ABSTRACT:
A microphone unit particularly adapted to be used as a built-in microphone for a device such as a tape recorder in which vibration-induced components in the output of the microphone are substantially eliminated. An electret-type microphone element is mounted in a cylindrical-shaped microphone case having a central wall. A ceramic piezoelectric element is secured against the wall with a weight pressing against the opposite side of the piezoelectric element. The outputs of the microphone element and the piezoelectric vibration pickup unit are combined in a circuit in which the characteristics of the output of the piezoelectric element are corrected so that substantially all of the vibration-induced component from the microphone element is cancelled.

REFERENCES:
patent: 3025359 (1962-03-01), Schilling et al.
patent: 3405288 (1968-10-01), Dittrich
patent: 3941932 (1976-03-01), D'Hoogh
patent: 4066842 (1978-01-01), Allen
patent: 4131760 (1978-12-01), Christensen et al.
patent: 4272846 (1981-06-01), Muratani et al.
patent: 4297531 (1981-10-01), Dalhof et al.

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