Electrical audio signal processing systems and devices – Artificial larynx – electrical
Patent
1995-10-03
1998-10-27
Isen, Forester W.
Electrical audio signal processing systems and devices
Artificial larynx, electrical
A61F 120
Patent
active
058287582
ABSTRACT:
A system of the present invention includes a sound source for providing sound in the oral-nasal cavity, a microphone to receive sound modulated by the user's mouth, tongue, teeth, and lips as he or she speaks or attempts vocalization, and a circuit. The circuit, coupled to the microphone, generates an output simulating a male or female voice that conveys the modulation as intelligible speech. In one embodiment, the sound source provides subaudible sound. In another embodiment, the circuit includes a sampling circuit for digital signal processing. In yet another embodiment, the circuit with a transducer constitute the sound source for providing overtones and diagnostic waveforms in the mouth. According to a method of the present invention, a modulated sound signal with a first period is received from an oral-nasal cavity and used to form a second signal having a longer period for conveying the first signal's modulation at a lower fundamental frequency. By nonintrusive monitoring of the oral-nasal cavity, a simulated voice is provided without discomfort for the vocally disabled, including laryngectomees.
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Byce Michael L.
Just Joel E.
Isen Forester W.
Pedersen Barbara S.
Pedersen Ken J.
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