Electrical audio signal processing systems and devices – Hearing aids – electrical – Noise compensation circuit
Reexamination Certificate
2011-08-09
2011-08-09
Nguyen, Tuan D (Department: 2614)
Electrical audio signal processing systems and devices
Hearing aids, electrical
Noise compensation circuit
C381S094100, C381S312000
Reexamination Certificate
active
07995780
ABSTRACT:
A hearing aid includes a hearing aid housing enclosing a microphone for converting sound into an audio signal, first feedback compensation means for providing a first feedback compensation signal of signals picked up by the microphone by modeling an internal mechanical feedback signal path of the hearing aid, second feedback compensation means for providing a second feedback compensation signal by modeling an external feedback signal path of the hearing aid, subtracting means for subtracting the first and second feedback compensation signals from the audio signal to form a compensated audio signal, processing means, connected to an output of the subtracting means, for processing the compensated audio signal, and a receiver, connected to an output of the processing means, for converting the processed compensated audio signal into a sound signal.
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International Search Report and Written Opinion mailed Dec. 28, 2005 for PCT/DK2005/000112.
Lindberg Erik
Pedersen Brian Dam
GN ReSound A/S
Nguyen Tuan D
Vista IP Law Group LLP.
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