Noise canceling microphone with visual feedback

Details Noise canceling microphone with visual feedback Noise canceling microphone with visual feedback

1993-01-21

1996-02-06

Peng, John K.

Electrical audio signal processing systems and devices

Having microphone

381 92, 381 94, 367120, 367122, H04R 300

Patent

active

054902193

ABSTRACT:
Briefly, according to the invention, a noise-cancelling microphone apparatus (400) is disclosed. The microphone (400) comprises a sound transducer (106) for converting sound waves to electrical signals and means for substantially preventing ambient noise from being converted to electrical signal. A circuit (100) is provided for determining the level of noise not prevented form being converted to electrical signal. The microphone (400) further includes a display (148) for indicating when the level of the ambient noise being converted to electrical signal is above a predetermined level.

REFERENCES:
patent: 3940575 (1976-02-01), Bauer
patent: 3992584 (1976-11-01), Dugan
patent: 4489442 (1984-12-01), Anderson et al.
patent: 4567608 (1986-01-01), Watson et al.
patent: 4817168 (1989-03-01), Fidi

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