Underwater audio intercommunication system

Details Underwater audio intercommunication system Underwater audio intercommunication system

1979-10-17

1981-06-30

Farley, Richard A.

Communications, electrical: acoustic wave systems and devices

Underwater system

Analog speech communication

H04B 1100

Patent

active

042766230

ABSTRACT:
Audio communications between divers or between a diver and a surface craft are made without unduly burdening the divers. Diver carried throat microphones pass vocal signals to a preamplifier-amplifier package. The package drives a transducer which projects amplified vocal signals that are capable of being heard by the other diver or feeds signals to a surface power supply pack and a speaker while a surface microphone enables communications from the surface to the divers. The divers don't carry any additional electronics instrumentations and, since there is no signal heterodyning, distortion is reduced.

REFERENCES:
patent: 3150345 (1964-09-01), Freeman

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