Howling protective apparatus

Details Howling protective apparatus Howling protective apparatus

1989-07-12

1990-02-27

Isen, Forester W.

Electrical audio signal processing systems and devices

One-way audio signal program distribution

Public address system

381 93, H04R 2700

Patent

active

049052900

ABSTRACT:
A howling protective apparatus comprising a phase fluctuation control means, a wave peak comparison means and a timer circuit, wherein said phase fluctuation circuit is controlled by an output from said timer circuit; a howling protective apparatus comprising a gain control means, a wave peak comparison means and a changing means for varying a coefficient of integration; a howling protective apparatus comprising a phase fluctuation circuit, a variable gain circuit and a wave peak comparison circuit, wherein said phase fluctuation circuit and the variable gain circuit are controlled by an output from said wave peak comparison circuit.

REFERENCES:
patent: 4079199 (1978-03-01), Patronis, Jr.
patent: 4449237 (1984-05-01), Stepp et al.
patent: 4747144 (1988-05-01), Admiraal et al.

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