Accession Number:

AD0626438

Title:

FARFIELD PRESSURE OF RANDOMLY VIBRATING STRUCTURES OVER GIVEN FREQUENCY BANDS.

Descriptive Note:

Technical rept.,

Corporate Author:

J G ENGINEERING RESEARCH ASSOCIATES BALTIMORE MD

Personal Author(s):

Report Date:

1965-10-01

Pagination or Media Count:

14.0

Abstract:

A relation between the cross spectral density of the farfield pressure outside a surface surrounding a sound source is given 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 multipole expansion for the mean square farfield pressure in low frequency bands is derived using a free field Greens Function. An expression for the magnitude and directivity of the farfield mean square pressure from various types of motions in any frequency band is obtained. Author

Subject Categories:

  • Acoustics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE