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The multichannel Wiener filter (MWF) and its variations have been extensivelyapplied to binaural hearing aids. However, its major drawback is the distortionof the binaural cues of the residual noise, changing the original acousticscenario, which is of paramount importance for hearing impaired people. TheMWF-IC method was previously proposed for joint speech dereverberation andnoise reduction, preserving the interaural coherence (IC) of diffuse noisefields. In this work, we propose a new variation of the MWF-IC for both speechdereverberation and noise reduction, which preserves the original spatialcharacteristics of the residual noise for either diffuse fields or pointsources. Objective measures and preliminary psychoacoustic experiments indicatethe proposed method is capable of perceptually preserving the originalspatialization of both types of noise, without significant performance loss inboth speech dereverberation and noise reduction.

Speech Dereverberation and Noise Reduction for both diffusive noise field and point noise source in Binaural Hearing Aids: Preliminary Version