Accession Number : ADA329087

Title :   Manned Diving for Intelligibility Assessment of EBS-II Communication System Components with Heliox and Nitrox Breathing Mediums.

Descriptive Note : Technical rept.,

Corporate Author : NAVY EXPERIMENTAL DIVING UNIT PANAMA CITY FL

Personal Author(s) : Fennewald, M. J. ; Olstad, W. D.

PDF Url : ADA329087

Report Date : JUL 1997

Pagination or Media Count : 52

Abstract : In October 1996, manned dives were conducted to evaluate the ability of the MK-24 microphone and AN,POS headset communicationS components to produce intelligible speech while diving with the MK-16 MOD 0 Underwater Breathing ApparatuS (UBA) in closed and open circuit modes and while breathing HeD2 and N202 at various depths. The objectives were to evaluate the ability of the MK-24 microphone to produce intelligible speech with divers breathing ReD2 (0.7PPO) to 300 few and shallower both with and without a helium speech unscrambler (HSU) To evaluate the ability of the MK-24 microphone to produce intelligible speech with divers breathing N202 (0.7PP02) in closed circuit mode and air in the open-circuit mode to 150 few and shallower. To evaluate the ability of the AN/POS headset to reproduce intelligible speech from topside and between divers breathing ReD2 (0.7PPO(2)), N(2)0(2) (0.7PPO(2)) and air to 300 fsw and shallower both with an without an HSU.

Descriptors :   *COMMUNICATION EQUIPMENT, *SPEECH RECOGNITION, *MICROPHONES, *DIVING, *BREATHING APPARATUS, *SPEECH SCRAMBLING, HELIUM, SPEECH, CIRCUITS, DIVERS, MANNED, INTELLIGIBILITY, HEAD UP DISPLAYS, CLOSED CYCLE SYSTEMS.

Subject Categories : Linguistics
      Anatomy and Physiology
      Command, Control and Communications Systems

Distribution Statement : APPROVED FOR PUBLIC RELEASE