EXTRACTION OF REVERBERATIVE SOUND USING MICROPHONE MASSIVES Russian patent published in 2018 - IPC G10L21/02 G10L19/00 

FIELD: physics.

SUBSTANCE: method contains the stages, on which the spatial coherence between the first phase of the scattered sound in the first microphone signal and the second phase of the ambient sound in the second microphone signal is estimated. The first microphone signal is captured by the first microphone, and the second microphone signal is captured by the second microphone, which is located at a distance from the first microphone. The method additionally contains a stage, at which the linear restrictions of the filtration coefficients of the ambient sound filter is determined, and the linear constraint is based on spatial coherence. The method also comprises the step of calculating at least one of the signal statistics and noise statistics with respect to the first microphone signal and the second microphone signal. The method also contains a stage, at which the coefficients of the filter filtration of ambient sound filter is determined by solving the optimisation problem against at least one of signal statistics and noise statistics, given the linear restrictions of the filtration coefficients.

EFFECT: ensuring the capture of scattered sound coming to the microphone array from all directions, by obtaining a better directional pattern of the scattered sound filter.

15 cl, 8 dwg