Noise suppression system

Details Noise suppression system Noise suppression system

1990-04-09

1992-07-21

Isen, Forester W.

Electrical audio signal processing systems and devices

Acoustical noise or sound cancellation

Adjacent ear

H03B 2900

Patent

active

051330172

ABSTRACT:
A noise cancellation system, comprising a symmetrical assembly of microphone inputs is disclosed. A controller receives the output of the microphone assembly and generates an electrical cancellation signal having a polarity opposite the polarity of a portion of a noise to be cancelled and a magnitude equal to the magnitude of the portion of the noise to be cancelled. An actuator receives the electrical cancellation signal and outputs an audio cancellation signal.

REFERENCES:
patent: 3712412 (1973-01-01), Hassett et al.
patent: 3936606 (1976-02-01), Wanke
patent: 4044203 (1977-08-01), Swinbanks
patent: 4177874 (1979-12-01), Angelini et al.
patent: 4527282 (1985-07-01), Chaplin et al.
patent: 4665549 (1987-05-01), Eriksson et al.
patent: 4715559 (1987-12-01), Fuller
patent: 4977600 (1990-12-01), Ziegler

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