Parallel processing of the matched-filter array for sound capture

Abstract

New microphone array and signal processing techniques for high quality hands-free sound capture in noisy, reverberant enclosures have been developed. The new techniques combine matched-filtering of individual sensors and parallel processing to provide acute spatial volume selectivity which is capable of mitigating the deleterious effects of noise interference and multipath distortion. The new method outperforms traditional delay-and-sum beamformers which provide only directional spatial selectivity. The research additionally explores truncated matched-filtering to reduce complexity and improve sound capture quality.