Microphone apparatus

Details Microphone apparatus Microphone apparatus

1994-02-17

1996-10-08

Isen, Forester W.

Electrical audio signal processing systems and devices

Acoustical noise or sound cancellation

Adjacent ear

G10K 1116

Patent

active

055639542

ABSTRACT:
A reference microphone is disposed close to a primary microphone through an enclosure wall of an appliance incorporating microphones, and a noise generated by mechanical systems and included in an output of the primary microphone is canceled by an adaptive filter. In a smaller hardware scale than a case of mounting a sensor for noise reference directly to a noise source, a noise component can be canceled more effectively depending on changes of noise environments.

REFERENCES:
patent: 4769847 (1988-09-01), Taguchi
patent: 5233667 (1993-08-01), Lee
patent: 5243661 (1993-09-01), Ohkubo et al.

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