Device and method for controlling the step size of an adaptive filter
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United States of America Patent
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Dec 17, 2013
Grant Date -
Dec 27, 2007
app pub date -
Jun 26, 2007
filing date -
Jun 26, 2006
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Abstract
The determination of a suitable step size for controlling the adaptation of a filter of an acoustic feedback compensator especially for hearing aids is to be improved. A step size controller is therefore provided in which an input signal is analyzed in at least two frequency bands. In doing so, any steep signal edges in the individual frequency bands are detected. The adaptation step size of an adaptive filter is then controlled depending on the number of frequency bands in which steep signal edges are detected, wherein the magnitude of the signal edges can be included in the decision.
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