Electrical audio signal processing systems and devices – Hearing aids – electrical – Specified casing or housing
Patent
1983-08-31
1986-09-16
Cangialosi, Salvatore
Electrical audio signal processing systems and devices
Hearing aids, electrical
Specified casing or housing
381 51, 178 2213, H04M 170
Patent
active
046124144
ABSTRACT:
Voice signals are transmitted over a voiceband telephone channel with a high degree of security and good voice quality by applying to the transmission channel a first signal which includes digital information derived from the vocal tract response of the signal and a second signal which includes continuous information derived from the excitation component of the voice signal.
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AT&T Information Systems Inc.
Cangialosi Salvatore
Lewis Aaron J.
Slusky Ronald D.
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