Accession Number:

ADA230327

Title:

Problems In Nonlinear Acoustics: pulsed finite amplitude sound beams, nonlinear acoustic wave propagation in a liquid layer, nonlinear effects in asymmetric cylindrical sound beams, effects of absorption on the interaction of sound beams and parametric receiving arrays

Descriptive Note:

Annual summary rept. no. 2, 1 Aug 1989-30 Sep 1990

Corporate Author:

TEXAS UNIV AT AUSTIN DEPT OF MECHANICAL ENGINEERING

Personal Author(s):

• Hamilton, Mark F.

Report Date:

1990-12-07

Pagination or Media Count:

20.0

Abstract:

This report discusses five projects all of which involve basic theoretical research in nonlinear acoustics. 1 Pulsed Finite Amplitude Sound Beams are studied with a recently developed time domain computer algorithm that solves the KZK nonlinear parabolic wave equation. 2 Nonlinear Acoustic Wave Propagation in a Liquid Layer is a study of harmonic generation and acoustic soliton information in a liquid between a rigid and a free surface. 3 Nonlinear Effects in Asymmetric Cylindrical Sound Beams is a study of source asymmetries and scattering of sound by sound at high intensity. 4 Effects of Absorption on the Interaction of Sound Beams is a completed study of the role of absorption in second harmonic generation and scattering of sound by sound. 5 Parametric Receiving Arrays is a completed study of parametric reception in a reverberant environment.

Descriptors:

• *ACOUSTIC WAVES
• NONLINEAR PROPAGATION ANALYSIS
• SCATTERING
• PARAMETRIC ANALYSIS
• ENVIRONMENTS
• LAYERS
• LIQUIDS
• NONLINEAR SYSTEMS
• ASYMMETRY
• WAVE PROPAGATION
• PARABOLAS
• COMPUTER APPLICATIONS
• ACOUSTICS
• ABSORPTION
• HIGH INTENSITY
• RECEPTION
• REVERBERATION
• TIME DOMAIN
• WAVE EQUATIONS
• HARMONIC GENERATORS
• ALGORITHMS
• SOURCES

Subject Categories:

• Acoustics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE