Electrical audio signal processing systems and devices – Hearing aids – electrical – Noise compensation circuit
Reexamination Certificate
2004-08-04
2009-10-27
Chin, Vivian (Department: 2614)
Electrical audio signal processing systems and devices
Hearing aids, electrical
Noise compensation circuit
C381S094200, C381S098000, C381S093000
Reexamination Certificate
active
07609841
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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Freed Daniel J.
Soli Sigfrid D.
Blakely , Sokoloff, Taylor & Zafman LLP
Chin Vivian
House Ear Institute
Kurr Jason R
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