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A directional audio-capturing device is highly desirable for normal communication in a noisy environment, and to enhance the quality of speech signal for the hearing impaired. In this paper, we propose a compact directional audio-capturing device which reduces the background noise in relation to speech signal which originates from a desired direction. This device contains three functional units: (1)...
A scheme for detecting and locating speech signals in the presence of reverberations using a linear array is proposed. The equispaced linear array with a plurality of omni-directional microphones is decomposed into two groups. Pairs of virtual and steerable directional microphones are then generated by using the frequency invariant beamforming technique for time delay estimations. This enables the...
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