Method for optimised filtering of non-stationary interference captured by a multi-microphone audio device, in particular a hands-free telephone device for an automobile.

摘要

The method involves combining signals picked up by two microphones to make a noisy combined signal, and calculating a probability that speech is absent from the noisy combined signal on the basis of respective spectral energy levels of the noisy combined signal and of a referent noise signal. Noise is selectively reduced by applying variable gain that is specific to each frequency band and to each time frame on the basis of the probability that speech is absent and on the basis of the noisy combined signal.