Method and apparatus for improving voice intelligibility in...

Details Method and apparatus for improving voice intelligibility in... Method and apparatus for improving voice intelligibility in...

H - Electricity

03

G

349/29

H03G 3/20 (2006.01) H03G 7/00 (2006.01)

Patent

CA 1290844

METHOD AND APPARATUS FOR IMPROVING VOICE INTELLIGIBILITY IN HIGH NOISE ENVIRONMENTS ABSTRACT OF THE DISCLOSURE The output of a noise canceling first or second order electret gradient microphone in a very high noise anviron- ment has background noise attenuated and certain phonemes shaped to improve intelligibility by means of a slow ac- tion automatic gain control circuit 22 which matches dynamic range of the microphone 10 with dynamic range of the following communication channel, and a fast action automatic gain control circuit 24 in parallel with the first circuit, that reshapes puff noise into plosive, fricative and affricative speech component signals that produced the puff noise.

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