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    Sound Pressures and Correlations of Noise on the Fuselage of a Jet Aircraft in Flight (1961)
    In:  CASI
    Details
    Publication Date: 2019-08-16
    Description: Tests were conducted at altitudes of 10,000, 20,000, and 30,000 feet at speeds of Mach 0.4, 0.6, and O.8. It was found that the sound pressure levels on the aft fuselage of a jet aircraft in flight can be estimated using an equation involving the true airspeed and the free air density. The cross-correlation coefficient over a spacing of 2.5 feet was generalized with Strouhal number. The spectrum of the noise in flight is comparatively flat up to 10,000 cycles per second.
    Keywords: Acoustics
    Type: NASA-TN-D-1086 , E-1140
    Format: application/pdf
    Location Call Number Expected Availability
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