Accession Number : AD0702101

Title :   NOISE GENERATED BY SECONDARY AND AUXILIARY AIRCRAFT SYSTEMS.

Descriptive Note : Final rept. 1 Nov 67-1 Nov 68,

Corporate Author : SCHOOL OF AEROSPACE MEDICINE BROOKS AFB TEX

Personal Author(s) : Gasaway,Donald C.

Report Date : DEC 1969

Pagination or Media Count : 27

Abstract : A variety of noise-generating mechanisms contribute to the overall noise environment encountered within fixed- and rotary-wing aircraft. The report contains descriptions and illustrations of secondary and auxiliary systems found within aircraft which contribute to the composite noise. Types of noise-generating mechanisms include: (1) transmission, gear-reduction, and shaft distribution systems; (2) air-conditioning and pressurization systems; (3) defrosting systems; (4) air-distribution ducts and vents, and air- circulating and blower units; (5) ground and airborne auxiliary power units and systems; and (6) aerodynamic and aeroelastic disturbances, including devices such as air brakes and landing gear. (Author)

Descriptors :   (*AIRCRAFT NOISE, REVIEWS), GEAR NOISE, TRANSMISSIONS(MECHANICS), AIRCRAFT EQUIPMENT, AIR CONDITIONING EQUIPMENT, AUXILIARY POWER PLANTS, AERODYNAMIC NOISE, AEROELASTICITY

Subject Categories : Aircraft
      Acoustics

Distribution Statement : APPROVED FOR PUBLIC RELEASE