Automatic sound level control of telephone station

Details Automatic sound level control of telephone station Automatic sound level control of telephone station

1981-03-16

1983-05-31

Rubinson, G. Z.

179 1F, H04M 160

Patent

active

043862365

ABSTRACT:
This arrangement comprises a controllable attenuation circuit of the voice signal received, a pulse-duration modulator which produces pulses the duration of which is modulated by the voice signal supplied by the controllable attenuation circuit, an overshoot detection circuit which produces from the modulated pulses a compression pulse each time it is detected that the amplitude of the modulated voice signal reaches a certain threshold, the compression signal produced by the said overshoot detection circuit being applied in the attenuation circuit to an integrating circuit which produces the attenuation control signal. The amplifier of the loudspeaker receives the modulated signal.

REFERENCES:
patent: 3911363 (1975-10-01), Patten

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