Matched-filter processing of microphone array for spatial volume selectivity

Performance of a delay-and-sum beamformer is typically degraded in a reverberant enclosure because the beam captures not only the desired source signal (direct path) but also all images along the beam axis. Matched-filter processing of microphone arrays is shown to improve the quality of sound capture in reverberant environments. This paper also reports the performance of matched-filter array processing in a real room. Significant improvements are shown over single microphones and the traditional delay-and-sum beamformer.