Accession Number : ADD008786

Title :   Underwater Audio Intercommunication System.

Descriptive Note : Patent,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Abbott,Frank R

Report Date : 30 Jun 1981

Pagination or Media Count : 4

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. (Author)

Descriptors :   *Patents, Underwater communications, *Voice communications, *Intercommunication systems, Divers, Microphones, Telephone lines, Amplifiers, Remote systems, Power supplies, Electroacoustic transducers, Distortion, Noise reduction

Subject Categories : Voice Communications

Distribution Statement : APPROVED FOR PUBLIC RELEASE