Apparatus for suppressing structure borne noises
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United States of America Patent
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-
Nov 12, 2002
Grant Date -
N/A
app pub date -
Mar 26, 1999
filing date -
Mar 28, 1998
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Body or structural noise transmitted through a connector such as a strut, that connects a noise source, such as an engine, to an enclosure, such as a passenger cabin or cell of a helicopter, is suppressed by at least one piezoactuator which is excited to counteract any vibrations of the strut caused by body noise so that body noise vibrations are cancelled or at least substantially suppressed. The excitation of the piezoactuator is controlled in closed loop fashion in response to feedback signals from a sensor secured to the connector.
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