APPROXIMATION TO THE MEAN SQUARE FARFIELD PRESSURE OF RANDOMLY VIBRATING STRUCTURES AT LOW FREQUENCIES.
Technical rept. no. 12,
J G ENGINEERING RESEARCH ASSOCIATES BALTIMORE MD
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A relation between the cross spectral density of the farfield pressure outside a surface surrounding a sound source is derived in terms of cross spectral density of the normal acceleration over a surface surrounding the source. The cross spectral density of the acceleration is given in terms of the modes of the structure. A resulting simple formula for the mean square farfield pressure in low frequency bands is derived using simple source Greens Functions. Author