Method and apparatus for restricting microphone acceptance angle
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United States of America Patent
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Mar 16, 1999
Grant Date -
N/A
app pub date -
Aug 19, 1996
filing date -
Aug 2, 1995
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A speech recognition system includes an input subsystem consisting of two or more simple microphones, each with a relatively large acceptance angle. The simple microphones are positioned so that the acceptance angles overlap by a relatively small amount. If signals received by each of the simple microphones exceed predetermined thresholds, then a switch is closed to permit a speech recognition subsystem to receive a signal for processing. An additional simple microphone, with a relatively wide acceptance angle centered on the overlap of the other microphones may be used to receive the signals that are fed to the speech recognition subsystem for processing.
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