Patent ID: 8737655
Filing Date: 2014-05-27
Classification: H04R

Abstract:
1. A maximum stable gain measurement system for a hearing assistance device, comprising: a microphone connected to convert received sound into a signal; a receiver configured to play sound; a processing channel adapted to process the signal and provide an output signal to an output node, the processing channel comprising: wherein the receiver is connected to the output node adapted to play signals at the output node, wherein the processing channel is programmed to adapt the adaptive filter using step-size control during injection of the white noise signal in a first mode of operation and to stop adaptation of coefficients in a second mode of operation; a bulk delay adapted to receive a white noise signal; and an acoustic feedback canceller connected to the bulk delay and to a time-domain filter using the coefficients of the adaptive filter, the time-domain filter connected to receive the white noise signal, the acoustic feedback canceller programmed to adapt during an injection of the white noise signal into the time-domain filter and the bulk delay in a third mode of operation and to freeze the parameters of the acoustic feedback canceller in a fourth mode of operation.