Audio feedback suppressor

Details Audio feedback suppressor Audio feedback suppressor

1982-04-14

1984-05-15

Pellinen, A. D.

Electrical audio signal processing systems and devices

Feedback suppression

381 83, H04R 300

Patent

active

044492375

ABSTRACT:
Positive feedback of an acoustic signal from a loud speaker to a microphone of a loud speaker system, i.e., howling, is prevented by randomly phase shifting an electric signal containing audio information supplied to the speaker. The random phase shifting is provided by variably delaying the electric signal in a serial analog register having a shift rate determined by an output signal of a pseudo random code generator.

REFERENCES:
patent: 3257510 (1966-06-01), Burkhard
patent: 3681708 (1972-08-01), Olmstead
patent: 4039753 (1977-08-01), Balogh et al.
patent: 4221927 (1980-09-01), Dankman et al.
patent: 4244262 (1981-01-01), Imai
patent: 4354415 (1982-10-01), Sonnabend

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