<abstract xmlns="http://www.w3.org/1999/xhtml"><p> A theoretical model of acoustic field for a parametric focusing source on concave spherical surface is proposed. In this model, the source boundary conditions of the Spheroidal Beam Equation (SBE) for difference frequency wave excitation were studied. Propagation curves and beam patterns for difference frequency component of the acoustic field are compared with those obtained for Khokhlov-Zabolotskaya-Kuznetsov (KZK) model. The results demonstrate that the focused parametric model of SBE is good valid for a large aperture angle in the strongly focused acoustic field. It is also investigated that high directivity and good focal ability with the decreasing of downshift ratio and the increasing of half-aperture angle for the focused parametric model of SBE.</p></abstract>

A theoretical model of acoustic field for a parametric focusing source on concave spherical surface is proposed. In this model, the source boundary conditions of the Spheroidal Beam Equation (SBE) for difference frequency wave excitation were studied. Propagation curves and beam patterns for difference frequency component of the acoustic field are compared with those obtained for Khokhlov-Zabolotskaya-Kuznetsov (KZK) model. The results demonstrate that the focused parametric model of SBE is good valid for a large aperture angle in the strongly focused acoustic field. It is also investigated that high directivity and good focal ability with the decreasing of downshift ratio and the increasing of half-aperture angle for the focused parametric model of SBE.

Modeling of Acoustic Field for a Parametric Focusing Source Using the Spheroidal Beam Equation

Department of Navigation Technology, Shanghai Maritime University, Shanghai, China

College of Ocean Science and Engineering, Shanghai Maritime University, Shanghai, China

Polish Maritime Research

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.

A theoretical model of acoustic field for a parametric focusing source on concave spherical surface is proposed. In this model, the source boundary conditions...

Modeling of Acoustic Field for a Parametric Focusing Source Using the Spheroidal Beam Equation

Published Online: Oct 15, 2015

Page range: 43 - 47

DOI: https://doi.org/10.1515/pomr-2015-0031

Keywords
parametric focusing source, difference frequency wave, SBE, acoustic field

© 2015

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.

Modeling of Acoustic Field for a Parametric Focusing Source Using the Spheroidal Beam Equation

Published Online: Oct 15, 2015

Page range: 43 - 47

DOI: https://doi.org/10.1515/pomr-2015-0031

Keywordsparametric focusing source, difference frequency wave, SBE, acoustic field

© 2015

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.

Keywords
parametric focusing source, difference frequency wave, SBE, acoustic field