Pulsating noise removal device

Details Pulsating noise removal device Pulsating noise removal device

1988-02-16

1990-02-06

Chin, Tommy P.

Electrical audio signal processing systems and devices

Noise or distortion suppression

Interpolation

455297, 455303, H04B 110, H04B 164

Patent

active

048993891

ABSTRACT:
A pulsating noise removal device includes first and second variable attenuators for varying signal levels of an audio signal component and a noise signal component both involved in an entered signal to use an output of the first variable attenuator to control the first and second variable attenuators and to use an output of the second attenuator to control a gate circuit for switching the entered signal, so that an inversion phenomenon is reliably prevented against a change either in the audio signal level or in the audio signal frequency.

REFERENCES:
patent: 4090221 (1978-05-01), Connor
patent: 4434438 (1984-02-01), Rzeszewski
patent: 4539594 (1984-09-01), Illitschko
patent: 4587620 (1986-05-01), Niimi
patent: 4648129 (1987-03-01), Toffolo

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