Accession Number : ADA193860

Title :   Acoustical Analysis of a Test Horn.

Descriptive Note : Interim rept. Sep 84-Aug 87,

Corporate Author : ANAMET LABS INC HAYWARD CA

Personal Author(s) : Moon, Young I ; Arnold, Rocky R

PDF Url : ADA193860

Report Date : 20 Jan 1988

Pagination or Media Count : 35

Abstract : The natural frequencies and mode shapes for three models of a small test horn are determined using the 3-D acoustic finite element computer program COMIC (COMplex AcoustIC Pressure Analysis). The mode shapes are presented graphically and nodal planes are identified. Placing a wall of blocks and a missile inside the model does not make any significant change in natural frequencies, although the nodal planes have moved in the direction of the added elements. Keywords: Finite elements; Acoustic horn.

Descriptors :   *FINITE ELEMENT ANALYSIS, *ACOUSTIC HORNS, ACOUSTICS, RESONANT FREQUENCY, SOUND ANALYZERS, SOUND PRESSURE, COMPUTER PROGRAMMING, GRAPHS

Subject Categories : Acoustic Detection and Detectors

Distribution Statement : APPROVED FOR PUBLIC RELEASE