We propose an instrumental variable method for adaptive feedback cancellation (IV-AFC) in hearing aids that is based on the autoregressive modelling of the desired signal. The IV-AFC offers better feedback suppression for spectrally colored signals than the standard continuous adaptation feedback cancellers. In contrast to a previously proposed prediction error method based feedback canceller, the IV-AFC does not suffer from stability problems when the adaptive feedback canceller is highly time-varying.
['Ann Spriet', 'Ian K. Proudler', 'Marc Moonen', 'Jan Wouters']
An instrumental variable method for adaptive feedback cancellation in hearing aids