Sidetone control circuit for a telephone set

Details Sidetone control circuit for a telephone set Sidetone control circuit for a telephone set

1977-05-20

1978-03-28

Claffy, Kathleen H.

179 1VL, H04M 158

Patent

active

040816206

ABSTRACT:
A controllable-gain amplifier is connected between the transmitter and receiver of a telephone set and is controlled in response to the level of the telephone user's speech so as to provide an increase in gain when the user speaks too loud and a decrease in gain when the user speaks too low. This results in a sidetone which causes the user to change his or her voice level to obtain an acceptable level of sidetone. A better-controlled user voice level is thus achieved.

REFERENCES:
patent: 2762867 (1956-09-01), Meacham
patent: 3170043 (1965-02-01), Hohmann
patent: 3440367 (1969-04-01), Holtz
patent: 3546395 (1970-12-01), Schuh
patent: 3602648 (1971-08-01), Holtz

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