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
      Acoustics

Distribution Statement : APPROVED FOR PUBLIC RELEASE