Accession Number : ADA302172

Title :   Communication and Noise Hazard Survey of CH-47D Crewmembers.

Descriptive Note : Final rept.,

Corporate Author : ARMY AEROMEDICAL RESEARCH LAB FORT RUCKER AL

Personal Author(s) : Ribera, John E. ; Mozo, Ben T. ; Mason, Kevin T. ; Murphy, Barbara A.

PDF Url : ADA302172

Report Date : NOV 1995

Pagination or Media Count : 16

Abstract : U.S. Army CH-47D cargo helicopter crewmembers are exposed to high levels of noise on a routine basis, yet must accomplish demanding missions which rely heavily on clear communication. This study looked at the auditory influences affecting communication by surveying 17 crewmembers of a CH-47D Army Reserve unit. Results revealed (1) noise levels that exceed other Army rotary-winged aircraft, (2) different exposure levels for aviators and crew chiefs, (3) an overall preference to hear 'critical or diagnostic' aircraft sounds rather than wear double hearing protection, (4) complaints of postflight tinnitus or muffled hearing, (5) helmet discomfort among the majority of crewmembers (6) a high incidence of hearing loss, (7) difficulties in adjusting radio volume controls for aviators, and (8) the effects of eyeglasses or protective masks on hearing and communications. (AN)

Descriptors :   *HELICOPTERS, *AIRCRAFT NOISE, *AVIATION MEDICINE, VOLUME, HAZARDS, FLIGHT CREWS, ARMY PERSONNEL, PILOTS, ROTOR BLADES(ROTARY WINGS), ACOUSTIC ATTENUATION, EXPOSURE(PHYSIOLOGY), RADIO SIGNALS, RADIO TRANSMISSION, AIR TRAFFIC CONTROLLERS, INTERCOMMUNICATION SYSTEMS, SOUND PRESSURE, THRESHOLDS(PHYSIOLOGY), BACKGROUND NOISE, HEARING, ARMY AIRCRAFT, PROTECTIVE MASKS, FLIGHT HELMETS, AUDITORY SIGNALS, AUDIOMETRY, EAR PROTECTORS, EYEGLASSES, AUDITORY DEFECTS.

Subject Categories : Helicopters
      Medicine and Medical Research
      Acoustics

Distribution Statement : APPROVED FOR PUBLIC RELEASE