Patent ID: 8175290

Claim:
Method for processing a microphone signal to obtain an output signal with reduced acoustic feedback, the method comprising: processing the microphone signal by an adaptive feedback suppression filter circuit performed in a signal path and in a non-signal path; processing the microphone signal by an adaptive feedback compensation filter circuit; and where: the processing by the adaptive feedback suppression filter circuit is dependent on the processing by the adaptive feedback compensation filter circuit; the adaptation of the filter coefficients of the adaptive feedback suppression filter circuit is performed in the non-signal path, the adaptive feedback suppression filter circuit producing in the signal path an adaptive feedback suppression output, the output signal with reduced acoustic feedback is produced as the result of combining the microphone signal and the adaptive feedback suppression output and wherein the output signal is used as an input signal to the adaptive feedback compensation circuit and the adaptive feedback suppression output is used as an input to the adaptive feedback compensation circuit.