Method and apparatus for improving noise discrimination in multiple sensor pairs
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United States of America Patent
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Aug 31, 2010
Grant Date -
Feb 14, 2008
app pub date -
Oct 9, 2007
filing date -
Aug 26, 2005
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Abstract
Noise discrimination in signals from a plurality of sensors is conducted by enhancing the phase difference in the signals such that off-axis pick-up is suppressed while on-axis pick-up is enhanced. Alternatively, attenuation/expansion are applied to the signals in a phase difference dependent manner, consistent with suppression of off-axis pick-up and on-axis enhancement. Nulls between sensitivity lobes are widened, effectively narrowing the sensitivity lobes and improving directionality and noise discrimination.
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