Accession Number : ADA301657

Title :   Acoustic Environments of the F-111A Aircraft during Ground Runup.

Descriptive Note : Final rept. Aug 67-Jan 68,

Corporate Author : AIR FORCE AEROSPACE MEDICAL RESEARCH LAB WRIGHT-PATTERSON AFB OH

Personal Author(s) : Cole, John N. ; Rose, Justus F., Jr

PDF Url : ADA301657

Report Date : MAY 1968

Pagination or Media Count : 60

Abstract : Sound pressure level measurements were made on an F-111A aircraft at 250-foot radial distance with three different engine power configurations at Wright-Patterson AFB, Ohio. In addition, sound level measurements were made at four maintenance positions where personnel would typically be located during normal ground operations. These data were used to compute the power spectra, directivity indices, equal sound pressure level contours, equal perceived noise level contours, and equal speech interference level contours. These results are presented in graphical form and can be used to determine the acoustic environments at distances from 125 to 6000 feet from the aircraft during ground operation.

Descriptors :   *FIGHTER AIRCRAFT, *ACOUSTIC MEASUREMENT, *SOUND PRESSURE, *AIRCRAFT ENGINE NOISE, MAINTENANCE, GROUND LEVEL, ENVIRONMENTS, AIRCRAFT ENGINES, OHIO, POWER SPECTRA, LEVEL(QUANTITY), ACOUSTICS, POWER, ATMOSPHERIC ATTENUATION, CONTOURS.

Subject Categories : Attack and Fighter Aircraft
      Acoustics

Distribution Statement : APPROVED FOR PUBLIC RELEASE