Dual-Channel Noise Power Spectral Density Estimation by using Complex Coherence Method

This paper presents the enhancement of noisy speech signals picked up by a dual microphone mobile phone in hand-free position. In previous approaches, spectral subtraction noise PSD estimation and a dedicated spectral subtraction weighting to reduction of wind noise by means of spectral weighting often leads to severe degradations to the speech signal. Since the novel technique is presented which estimates the coherence of the speech and noise signals, which is usually not known in practice. In this paper proposed coherence method express a better performance compared to related approaches.