Voice changer

Details Voice changer Voice changer

1987-03-27

1989-04-18

Schreyer, Stafford D.

Telephonic communications

Substation or terminal circuitry

Conversion of signal form

380 9, 381 61, 381 36, H04M 100, H03G 300, G06F 316

Patent

active

048233803

ABSTRACT:
A voice changer for use generally with a telephone includes a first port for receiving signals from a microphone or the hand set, a second port for connection to a microphone or a telphone set, and a voice changer circuit for selectively changing the frequency content of voice signals transmitted between the first and second ports. The clocking frequency of analog to digital and digital to analog converters connected to a continuously operating real-tim CPU varies the frequency content of the voice signal to provide masking of voices, for example changing a male to a female voice or a female to a male voice.

REFERENCES:
patent: 3234333 (1966-02-01), Guder
patent: 3681756 (1972-08-01), Burkhard et al.
patent: 4160122 (1979-07-01), Jacobson
patent: 4191861 (1980-03-01), Walker, Jr.
patent: 4367374 (1983-01-01), Serrano
patent: 4683588 (1987-07-01), Goldberg

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