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).
Communication and Noise Hazard Survey of CH-47D Crewmembers
1995
16 pages
Report
No indication
English
Aircraft , Clinical Medicine , Acoustics , Noise Pollution & Control , 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 , Ch-47d aircraft
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