Overload protection for loudspeakers in exhaust systems
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United States of America Patent
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Jul 14, 2015
Grant Date -
May 2, 2013
app pub date -
Nov 1, 2012
filing date -
Nov 2, 2011
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Abstract
A method for controlling an anti-sound system includes measuring sound within an exhaust system of a vehicle, calculating a control signal based on the measured sound, calculating a thermal load to be expected of the at least one loudspeaker of the anti-sound system during operation with a control signal based on a mathematical model of a thermal behavior of the loudspeaker and/or a mechanical load to be expected of the at least one loudspeaker of the anti-sound system based on a mathematical model of a mechanical behavior the loudspeaker, comparing the calculated thermal and/or mechanical load with a specified maximum load, operating the loudspeaker with the control signal, if the calculated thermal and/or mechanical load is smaller than or equal to the maximum load, and changing the spectrum of the control signal, in order to receive a corrected control signal, if the calculated load is greater than the maximum load.
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