Active vibration noise control device
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United States of America Patent
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Apr 19, 2016
Grant Date -
Feb 21, 2013
app pub date -
Feb 18, 2010
filing date -
Feb 18, 2010
priority date (Note) -
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Abstract
The disclosed active vibration noise control device is suitable for use in cancelling out vibration noise by outputting control noise from a plurality of speakers. When a vibration noise frequency is in a dip bandwidth, the active vibration noise control device alters the step size parameters used to update the filter coefficient at at least one filter coefficient update means from among a plurality of filter coefficient update means. Thus, the filter coefficient update speed can be retarded in unstable dip bandwidths, enabling loss in silencing effect which occurs during dip characteristics to be appropriately reduced.
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