Patent ID: 8477952

Claim:
A binaural hearing aid system comprising first and second hearing instruments adapted for being worn at or in left and right ears of a user, the first and second hearing instruments each comprising a microphone for capturing first and second audio signals, respectively, an audio signal processor, an output transducer, and transceiver circuitry for establishing a wireless link allowing an exchange of signals between the two hearing instruments, the first hearing instrument further comprising a feedback tone detector for detecting a possible feedback tone and the corresponding frequency of the feedback tone between the output transducer and the microphone of the first hearing instrument, an adaptive feedback cancellation system, a controller for changing the phase of the first audio signal at a given frequency with a predefined amount when the feedback detector detects a possible feedback tone in the first hearing instrument at this frequency, and a comparing unit for comparing the frequency of the detected possible feedback tone before and after effecting the change of the phase of the first audio signal, wherein the binaural hearing aid system is adapted to provide that the phase change introduced in the first audio signal by the controller of the first hearing instrument is introduced in the second audio signal of the second hearing instrument via said wireless link.