Telephone System for Diver Communication.
DEPARTMENT OF THE NAVY WASHINGTON D C
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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
- Life Support Systems
- Non-Radio Communications