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

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.