Cellular telephone audio input compensation system and method

Details Cellular telephone audio input compensation system and method Cellular telephone audio input compensation system and method

1997-10-08

1998-12-22

Eisenzopf, Reinhard J.

Telecommunications

Transmitter

Measuring, testing, or monitoring of transmitter

455116, 455127, 381109, H01G 1112

Patent

active

058527699

ABSTRACT:
A cellular telephone transmitter is provided, including a selectable gain microphone amplifier, to transmit vocal signals to the receiver of a communicating telephone. The telephone transmitter including a variable gain amplifier to amplify the vocal signal picked up by the microphone, a gain controller to vary the gain of the amplifier, and a selector associated with the gain controller which allows the telephone user to choose the gain of the amplifier. The telephone user intermittently activates the selector, while speaking, to choose an amplifier gain level appropriate to the volume of the input vocal signal. In particular, the user can elect to temporarily boost the gain while whispering into the phone. A method is also disclosed.

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