Patent ID: 8842861
Filing Date: 2014-09-23
Classification: H04R

Abstract:
1. A method for processing signals in a hearing aid system comprising the steps of: providing a first signal representing the output from a first input transducer in a first hearing aid of the hearing aid system; providing a second signal representing the output from a second input transducer of the hearing aid system; transforming the first and second signal from the time domain and to the time-frequency domain hereby providing a third and fourth signal, respectively; calculating a value representing the interaural coherence between the third and fourth signal hereby providing a fifth signal; deriving a first gain value for the hearing aid system based on the fifth signal; applying the first gain value in the amplification of the third signal in the first hearing aid hereby providing a sixth signal; transforming the sixth signal from the time-frequency domain and to the time domain hereby providing a seventh signal for further processing in the hearing aid system; and wherein the relation determining the first gain value as a function of the value representing the interaural coherence comprises three contiguous ranges for the values representing the interaural coherence, where the maximum slope in the first and third range are smaller than the maximum slope in the second range and wherein the ranges are defined such that the first range comprises values representing low interaural coherence values, the third range comprises values representing high interaural coherence values, and the second range comprises values representing intermediate interaural coherence values.