Active acoustic attenuation system with overall modeling
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United States of America Patent
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Jan 22, 1991
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N/A
app pub date -
May 3, 1990
filing date -
May 3, 1990
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Expired
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Abstract
An active acoustic attenuation system (200) has a first adaptive filter model M modeling the acoustic path P from an input transducer (10) to an output transducer (14), and a second adaptive filter model Q modeling the overall system from the input transducer (10) to an error transducer (16). A third adaptive filter model T models the transfer function S of the output transducer (14) and the error path E between the output transducer (14) and the error transducer (16), without an auxiliary random noise source.
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