COMMUNICATION SURVEY OF CH-47D CREWMEMBERS

U.S. Army CH-47D cargo helicopter crewmembers are exposed to high leve ls of noise on a routine basis, yet must accomplish demanding missions that rely heavily on clear communication, This study looked at the au ditory influences affecting communication by 17 crewmembers of a CH-47 D Army Reserve unit, Results revealed (1) noise levels that exceed tho se of other Army rotary-winged aircraft, (2) different exposure levels for aviators and crewchiefs, (3) an overall preference for hearing '' critical or diagnostic'' aircraft sounds rather than wearing double he aring protection, (4) complaints of postflight tinnitus or muffled hea ring, (5) helmet discomfort among the majority of crewmembers, (6) a h igh incidence of hearing loss, (7) difficulties in adjusting radio vol ume controls for aviators, and (8) the effects of eyeglasses or protec tive masks on hearing and communications.