Frequency shifter for use in adaptive feedback cancellers for hearing aids
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United States of America Patent
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Oct 27, 2009
Grant Date -
Dec 8, 2005
app pub date -
Aug 4, 2004
filing date -
Aug 4, 2003
priority date (Note) -
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Abstract
A decorrelation method for improving feedback cancellation utilizes a small frequency shifting ratio, on the order of 0.3 percent. Frequency shifting is applied only to the high frequency portion of the signal, which is shifted alternately upward and downward.
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