Voice activity detector (VAD)—based multiple-microphone acoustic noise suppression
First Claim
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1. A method for removing noise from acoustic signals, comprising:
- receiving from a plurality of microphones, a 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 comprises a skin surface microphone (SSM) of a voice activity detector (VAD) device included in a wireless earpiece or a wireless headset, the SSM including a covering operative to change an impedance of a microphone of the SSM;
generating at least one first transfer function representative of the plurality of acoustic signals upon determining that voicing information is absent from the plurality of acoustic signals for at least one specified period of time; 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.
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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.
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11 Claims
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1. A method for removing noise from acoustic signals, comprising:
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receiving from a plurality of microphones, a 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 comprises a skin surface microphone (SSM) of a voice activity detector (VAD) device included in a wireless earpiece or a wireless headset, the SSM including a covering operative to change an impedance of a microphone of the SSM; generating at least one first transfer function representative of the plurality of acoustic signals upon determining that voicing information is absent from the plurality of acoustic signals for at least one specified period of time; 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 (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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Specification