Noise cancellation apparatus

Details Noise cancellation apparatus Noise cancellation apparatus

1992-10-29

1995-01-10

Dwyer, James L.

Telephonic communications

Substation or terminal circuitry

Conversion of signal form

379395, 379419, 379433, 381 71, 381 92, H04M 100

Patent

active

053814738

ABSTRACT:
Apparatus for reducing acoustic background noise for use with a telephone handset or a boom microphone device or the like. The apparatus includes first and second microphones which are arranged such that the first microphone receives a desired speech input and the background noise present in the vicinity of the speech, and the second microphone receives substantially only the background noise. The background noise from the second microphone is converted into a corresponding electrical signal and subtracted from a signal corresponding to the speech and background noise obtained from the first microphone so as to produce a signal representing substantially the speech.

REFERENCES:
patent: 3830988 (1974-08-01), Mol et al.
patent: 3889059 (1975-06-01), Thompson et al.
patent: 4334740 (1982-06-01), Wray
patent: 4463222 (1984-07-01), Poradowski
patent: 4672674 (1987-01-01), Clough et al.
patent: 4752961 (1988-06-01), Kahn
patent: 4783817 (1988-11-01), Hamada et al.

Affiliated with

Also associated with

Rating

Noise cancellation apparatus does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Noise cancellation apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Noise cancellation apparatus will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-856940