Loudspeaking telephone

Details Loudspeaking telephone Loudspeaking telephone

1982-09-17

1985-07-02

Rubinson, Gene Z.

179100L, H04M 908

Patent

active

045270147

ABSTRACT:
An apparatus and method of controlling the loop gain in a loudspeaking telephone comprising storing reduced representations of an outgoing signal and an incoming signal in corresponding incoming and outgoing storage circuits respectively, in which the storage circuits have much faster attack times than decay times, comparing the representations, and controlling the gains of outgoing and incoming signal paths of the loop according to the degree and polarity of the result of the comparison. With the outgoing signal path connected to a microphone or a signal source and the incoming signal path connected to a loudspeaker, hands-free communication can be carried on having much more natural characteristics than in the past, devoid of most of the "hollow" sound characteristic of prior art systems.

REFERENCES:
patent: 3876835 (1975-04-01), Barnaby et al.
patent: 4028505 (1977-06-01), Fassino
patent: 4115659 (1978-09-01), Spanel et al.
patent: 4400581 (1983-08-01), Jacobson
"Electrical Communication", 1978, vol. 53, No. 4, p. 304.

Affiliated with

Also associated with

Rating

Loudspeaking telephone does not yet have a rating. At this time, there are no reviews or comments for this patent.

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

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-382686