Post-laryngectomy speech aid

Details Post-laryngectomy speech aid Post-laryngectomy speech aid

1988-10-11

1991-02-12

Isen, Forester W.

Electrical audio signal processing systems and devices

Artificial larynx, electrical

H04R 2500

Patent

active

049930710

ABSTRACT:
A speech aid for laryngectomy patients is described and comprises an electromechanical transformer with a power output stage connected upstream, a pulse generator for the production of a basic frequency, manually operated switches and electrical filters designed to vary the pulse frequency as a function of time. The power output stage in this respect comprises an electronic switch which is controlled by the basic frequency and a controlling pulse generator which switches the electronic switch off at least with temporal priority over the basic frequency.

REFERENCES:
patent: 3732370 (1973-05-01), Sacks
patent: 3775545 (1973-11-01), Tsukamoto et al.
patent: 3914550 (1975-10-01), Cardwell, Jr.
patent: 4039756 (1977-08-01), Burtschi
patent: 4550427 (1985-10-01), Katz et al.
patent: 4677890 (1987-07-01), Yannes

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