Systems and methods for controlling acoustical damping
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United States of America Patent
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Apr 15, 2008
Grant Date -
Oct 6, 2005
app pub date -
Mar 31, 2005
filing date -
Mar 31, 2004
priority date (Note) -
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Abstract
A control system (10) controls a variable acoustical damping device (20) disposed in a sound producing channel (5) of a vehicle engine (1). The control system includes a controller (12) and a selection device (14). The controller is coupled to the variable acoustical damping device and stores a plurality of control patterns (A. B) for different levels of acoustical damping of the acoustical damping device. The selection device outputs a selection signal to the controller so that the controller controls the variable acoustical damping device based on one of the control patterns corresponding to the selection signal.
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