Communication and Noise Hazard Survey of CH-47D Crewmembers

摘要

U.S. Army CH-47D cargo helicopter crewmembers are exposed to high levels of noiseon 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).