Wireless hands-free conference telephone system

Details Wireless hands-free conference telephone system Wireless hands-free conference telephone system

1983-05-23

1985-11-26

Rubinson, Gene Z.

Electrical audio signal processing systems and devices

Hearing aids, electrical

Specified casing or housing

179 2EA, 179 18BC, 381 91, H04Q 704, H04R 102

Patent

active

045555923

ABSTRACT:
A wireless hands-free conference telephone system includes an FM transmitter having multi-directional sound pick-up capability and battery power is adapted for remote wireless transmission of sounds originating in the area adjacent the transmitter to a unitary receiver, amplifier and voice switcher adapted for signal conducting connection to a conventional telephone system. The receiver portion of the unitary system is adapted for receiving the signal from the FM transmitter. The amplifier provides power to drive loudspeakers which radiate the sound incoming from the telephone system. A voice switching circuit is positioned between the telephone, the transmitter and the loudspeaker circuit, and is able to ascertain signal strength from the transmitter circuit and the incoming telephone line, discern which is the stronger signal, and increase the gain of that signal while decreasing the gain of the opposing signal.

REFERENCES:
patent: 3124657 (1964-03-01), Peterson
patent: 3601530 (1971-08-01), Edson et al.
patent: 3694578 (1972-09-01), Reid
patent: 3889059 (1975-06-01), Thompson et al.
patent: 4225754 (1980-09-01), Bernard et al.
patent: 4291197 (1981-09-01), Yunaga
patent: 4319086 (1982-03-01), Thompson
patent: 4363935 (1982-12-01), Toya
patent: 4400584 (1983-08-01), Vilmur
Data Sheet, Model S53P and Model S55P, "Distant Pickup Microphone Isolation Stand", Shure Brothers Inc., 1979.

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