Electrical audio signal processing systems and devices – Hearing aids – electrical – Specified casing or housing
Patent
1992-10-13
1995-07-04
MacDonald, Allen R.
Electrical audio signal processing systems and devices
Hearing aids, electrical
Specified casing or housing
395 217, 395 218, 395 223, 395 242, 395 226, 381 49, G10L 500
Patent
active
054308267
ABSTRACT:
Human speech is detected in an audio signal by first providing a single autocorrelated signal indicative of the audio signal multiplied by a time-delayed portion of the audio signal, the delay being an amount of time indicative of a period corresponding to a first formant frequency. Portions of the autocorrelated signal are compared with a scaled noise value. Human speech is detected by examining whether a plurality of portions of the autocorrelated signal exceed the scaled noise value.
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Sinclair Gregory S.
Webster Mark A.
Wright Thomas H.
Dorvil Richemond
Harris Corporation
MacDonald Allen R.
Wands Charles
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