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.

Report Date:

1988-01-20

Pagination or Media Count:

35.0

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