Telephonic communications – Substation or terminal circuitry – Conversion of signal form
Patent
1996-03-05
1999-10-12
Tsang, Fan S.
Telephonic communications
Substation or terminal circuitry
Conversion of signal form
379 68, 379 86, 379388, 379389, 379390, H04M 164, H04M 100
Patent
active
059664380
ABSTRACT:
An adaptive volume controlled radiotelephone system includes a microphone, a loudspeaker, a transceiver, and an adaptive volume control. The microphone generates an output electrical audio signal in response to sound, and the loudspeaker produces sound in response to an input electrical audio signal. The transceiver is responsive to the microphone and transmits radiotelephone communications to a remote party and receives radiotelephone communications from the remote party to generate the input electrical audio signal. The adaptive volume control is responsive to the output electrical audio signal and selects an amplitude of the sound produced by the loudspeaker so that the amplitude of the sound produced by the loudspeaker increases as the amplitude of the sound received at the microphone increases and decreases as the amplitude of the sound received at the microphone decreases.
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Ericsson Inc.
Hoosain Allan
Tsang Fan S.
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