Abstract
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. (Author)
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