Accession Number : ADD005047

Title :   Telephone System for Diver Communication.

Descriptive Note : Patent Application,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON D C

Personal Author(s) : Tuovila,Eric J ; Werle,Christian P F

Report Date : 16 Dec 1977

Pagination or Media Count : 15

Abstract : The report describes a telephone system for use by divers employing demand breathing apparatus. Sounds picked up by each diver's microphone are processed by selective filtering, amplification, rectification and comparison to a reference voltage level to provide logic signals representative of presence or absence of inhalation noise that could mask voice transmissions of other divers or of a tender. The microphone output to listening stations is switched through an attenuation path by the logic signal representing inhalation noise and through a by-pass or full strength path by the other logic signal. (Author)

Descriptors :   *Patent applications, *Telephone equipment, Underwater communications, Breathing apparatus

Subject Categories : Life Support Systems
      Non-radio Communications

Distribution Statement : APPROVED FOR PUBLIC RELEASE