Method and apparatus for reducing noise from a mobile telephone and for protecting the privacy of a mobile telephone user
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United States of America Patent
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Issued Date -
Sep 30, 2004
app pub date -
Mar 28, 2003
filing date -
Mar 28, 2003
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A method for reducing noise for a mobile telephone uses two boom microphones to create a processed voice signal with reduced noise content. A voice signal is received from a first microphone positioned near a user's mouth. A noise signal is received from a second microphone positioned at a distance from the user's mouth. A microprocessor cancels the noise signal from the voice signal and outputs the processed voice signal with reduced noise content. Another embodiment protects the privacy of a user of a mobile telephone by creating an acoustic signal from a sensed user's voice signal, which acoustic signal is an inverse of the user's voice signal. This inverse acoustic signal prevents any intelligible voice from reaching any bystanders.
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