The 2ch hybrid subtractive beamformer applied to line sound sources
نویسندگان
چکیده
A small-scale microphone array generally adopts the subtractive beamforming technique, which constructs sharp notches in a spatial beampattern, so that target sound sources are assumed as point sound sources. However, the shapes of actual sound sources are various and not always points. Our mouths are line sound sources or plane sound sources. It is important to deal with line sound sources when we apply the subtractive beamformer to speech signal processing. This paper proposes a hybrid subtractive beamformer that combines several 2ch subtractive beamformers properly in each frequency to expand the width of a sharp notch. The feasibility of the proposed hybrid subtractive beamformer is confirmed by performance tests in suppressing the signals from line sound sources.
منابع مشابه
Sound Sources
The neareld problem is a source of anxiety with beamforming techniques. We propose a strategy to solve the neareld problem by using a subtractive beamforming technique. The authors earlier proposed a method for noise reduction using paired-microphones. In this paper, the method is improved for neareld sound sources. The proposed method can maintain a high performance regardless of the distance ...
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