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STUDY OF MVDR DUAL-MICROPHONE ALGORITHM FOR SPEECH ENHANCEMENT IN COHERENT NOISE PRESENCE

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Subject of research. This paper considers a dual-channel algorithm implementation, namely, Minimum Variance Distortionless Response (MVDR), for speech enhancement in the presence of coherence noise using dual-microphone arrays. Methods. The study was performed using analytical models and recordings in an anechoic chamber. Main results. It is shown that the MVDR algorithm can be represented as a combination of a differential algorithm with an adaptive null steering adjustment in the directions of the coherent noise sources and an equalizer that equalizes the spatial-frequency response in the direction of the target source. Practical relevance. The advantage of the MVDR algorithm is automatic null steering in the directions of noise sources. The results are applicable in the design of systems with a large number of microphones.

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