VOICE ACTIVITY DETECTOR (VAD)-BASED MULTIPLE-MICROPHONE ACOUSTIC NOISE SUPPRESSION
6 Assignments
0 Petitions
Accused Products
Abstract
Acoustic noise suppression is provided in multiple-microphone systems using Voice Activity Detectors (VAD). A host system receives acoustic signals via multiple microphones. The system also receives information on the vibration of human tissue associated with human voicing activity via the VAD. In response, the system generates a transfer function representative of the received acoustic signals upon determining that voicing information is absent from the received acoustic signals during at least one specified period of time. The system removes noise from the received acoustic signals using the transfer function, thereby producing a denoised acoustic data stream.
3 Citations
55 Claims
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1. (canceled)
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2-44. -44. (canceled)
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45. A method for removing noise from acoustic signals, comprising:
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receiving from a plurality of microphones, a plurality of acoustic signals, the plurality of acoustic signals including reflections, echoes or both, of at least one of the plurality of acoustic signals; receiving information on a vibration of human tissue associated with human voicing activity from a tissue vibration detector in physical contact with the human tissue, the tissue vibration detector including a skin surface microphone of a voice activity detector device included in a wireless earpiece or a wireless headset, the skin surface microphone including a covering being configured to change an impedance of a microphone of the skin surface microphone; determining, by the voice activity detector device, a signal associated with voicing information being absent in the plurality of acoustic signals for at least one specified period of time; generating, based on the determining, at least one first transfer function representative of the plurality of acoustic signals; and removing noise from the plurality of acoustic signals using the at least one first transfer function to produce at least one denoised acoustic data stream. - View Dependent Claims (46, 47, 48, 49, 50, 51, 52, 53, 54, 55)
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Specification