Accession Number : AD0742972
Title : Noise within Fixed-Wing Utility Aircraft Used by the Military.
Descriptive Note : Progress rept., Mar-Sep 71,
Corporate Author : SCHOOL OF AEROSPACE MEDICINE BROOKS AFB TEX
Personal Author(s) : Gasaway,Donald C.
Report Date : DEC 1971
Pagination or Media Count : 25
Abstract : A variety of small fixed-wing aircraft are used by the military services to perform numerous utility tasks. The character of the noise encountered within the utility-type aircraft is described and illustrated. Noise envelopes are depicted for 14 aircraft powered by small reciprocating engines rated at less than 600 horsepower, 9 powered by reciprocating engines rated at 1200 to 1525 horsepower, and 8 powered by turboprop engines. In addition to general noise profiles representative of normal cruise, levels are shown for other phases of operation. The noise encountered within utility aircraft constitutes a significant auditory risk since personal ear protection (including headsets mounted in crash helmets) is not routinely worn in most of these aircraft. (Author)
Descriptors : (*AIRCRAFT CABINS, *AIRCRAFT NOISE), (*UTILITY AIRCRAFT, AIRCRAFT NOISE), ENGINE NOISE, PROPELLER NOISE, AVIATION PERSONNEL, HEARING, EAR PROTECTORS, AVIATION SAFETY
Subject Categories : Transport Aircraft
Distribution Statement : APPROVED FOR PUBLIC RELEASE