Noise suppression apparatus

Details Noise suppression apparatus Noise suppression apparatus

1988-10-31

1990-06-05

Isen, Forester W.

Textiles: ironing or smoothing

H04B 1500

Patent

active

049320637

ABSTRACT:
A noise suppression apparatus has a main microphone for mainly picking up a voice and for outputting an input signal including an audio signal and a first noise component generated from a noise source, a reference microphone for picking up a second noise component generated from the noise source, a filter bank for band-dividing the input signal from the main microphone and the second noise component from the reference microphone, and a noise cancel circuit for obtaining a phase difference between the input signal and the second noise component with respect to each divided band of the filter bank so as to correct the input signal based on the phase difference and for cancelling the first noise component in the input signal by use of the corrected input signal.

REFERENCES:
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patent: 4358738 (1982-11-01), Kahn
patent: 4594695 (1986-06-01), Garconnat et al.
patent: 4636586 (1987-01-01), Schiff
patent: 4723294 (1988-02-01), Taguchi
patent: 4769847 (1988-09-01), Taguchi

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