Selective sound enhancement
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United States of America Patent
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N/A
Issued Date -
Mar 27, 2003
app pub date -
Sep 24, 2002
filing date -
Sep 24, 2001
priority date (Note) -
Abandoned
status (Latency Note)
Importance
Abstract
Two microphones, or sets of microphones, pointed in different directions are used to generate filter parameters based on correlation and coherence of signals received from the microphones. First signals are obtained from sound received by at least one first microphone. Each first microphone receives sound from a first set of directions including a first principal sensitivity direction. The desired sound direction is included in the first set of directions. Second signals are obtained from sound received by at least one second microphone. Each second microphone receives sound from a second set of directions including a second principal sensitivity direction different than the first principal sensitivity direction. The desired sound direction is included in the second set of directions. Filter coefficients are determined based on coherence of the first signals and the second signals and on correlation between the first signals and the second signals. A combination of the first signals and the second signals is filtered with the determined filter coefficients.
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