Accession Number:

ADD005047

Title:

Telephone System for Diver Communication.

Descriptive Note:

Patent Application,

Corporate Author:

DEPARTMENT OF THE NAVY WASHINGTON D C

Report Date:

1977-12-16

Pagination or Media Count:

15.0

Abstract:

The report describes a telephone system for use by divers employing demand breathing apparatus. Sounds picked up by each divers 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

Subject Categories:

  • Life Support Systems
  • Non-Radio Communications

Distribution Statement:

APPROVED FOR PUBLIC RELEASE