Accession Number:

AD0609634

Title:

APPROXIMATION TO THE MEAN SQUARE FARFIELD PRESSURE OF RANDOMLY VIBRATING STRUCTURES AT LOW FREQUENCIES.

Descriptive Note:

Technical rept. no. 12,

Corporate Author:

J G ENGINEERING RESEARCH ASSOCIATES BALTIMORE MD

Personal Author(s):

Report Date:

1964-11-01

Pagination or Media Count:

16.0

Abstract:

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

Subject Categories:

Distribution Statement:

APPROVED FOR PUBLIC RELEASE