System and method for actively damping boom noise in a vibro-acoustic enclosure
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United States of America Patent
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Dec 4, 2007
Grant Date -
Sep 12, 2002
app pub date -
Jan 11, 2002
filing date -
Jan 12, 2001
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A system and method for actively damping boom noise within an enclosure such as an automobile cabin. The system comprises an acoustic wave sensor, a motion sensor, an acoustic wave actuator, a first electronic feedback loop, and a second electronic feedback loop. The enclosure defines a plurality of low-frequency acoustic modes that can be induced/excited by the enclosure cavity, by the structural vibration of a panel of the enclosure, by idle engine firings, and a combination thereof. The acoustic wave actuator is substantially collocated with the acoustic wave sensor within the enclosure. The motion sensor can be secured to a panel of the enclosure.
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