Noise silencing device

Details Noise silencing device Noise silencing device

1996-01-29

1998-03-10

Kuntz, Curtis

Electrical audio signal processing systems and devices

Acoustical noise or sound cancellation

Counterwave generation control path

381 711, A61F 1106

Patent

active

057270716

ABSTRACT:
A noise silencer is proposed that is composed of a sensor microphone, a speaker, and a control circuit, and which principally silences noise generated from the outside. Noise emitted from a noise source is detected by the sensor microphone, and additional sound for canceling the noise emitted from a noise source is generated from the speaker. The control circuit produces drive signals based on signals from the sensor microphone for causing the generation of additional sound from the speaker that is of reverse phase and identical sound pressure with respect to noise emitted from the noise source.

REFERENCES:
patent: 4805733 (1989-02-01), Kato et al.
patent: 5319715 (1994-06-01), Nagami et al.

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