Self-demodulation effects in nonlinear focused beams

Author

Konicek, Petr ; Bednarik, Michal ; Cervenka, Milan

Author_Institution

Dept. of Phys., CTU-FEE Prague, Prague, Czech Republic

fYear

2011

fDate

18-21 Oct. 2011

Firstpage

1687

Lastpage

1688

Abstract

In this work, spatial distributions of acoustic pressure of the nonlinear focused sound beams are presented. Focused acoustic beams of periodic waves with an initially Gaussian amplitude distribution are considered. The numerical algorithm is based on the numerical solution of the nonlinear parabolic Khokhlov-Zabololotskaya-Kuznetsov (KZK) equation. The presented model enables to study the process of nonlinear generation of a low-frequency signal by the amplitude modulated high-frequency carrier wave.

Keywords

Gaussian distribution; acoustic intensity measurement; acoustic signal processing; acoustic waves; modulation; nonlinear acoustics; parabolic equations; Gaussian amplitude distribution; acoustic pressure; amplitude modulated high-frequency carrier wave; low-frequency signal; nonlinear focused sound beams; nonlinear parabolic Khokhlov-Zabololotskaya-Kuznetsov equation; numerical algorithm; periodic waves; self-demodulation effects; Acoustic beams; Acoustics; Equations; Fourier series; Frequency modulation; Mathematical model;

fLanguage

English

Publisher

ieee

Conference_Titel

Ultrasonics Symposium (IUS), 2011 IEEE International

Conference_Location

Orlando, FL

ISSN

1948-5719

Print_ISBN

978-1-4577-1253-1

Type

conf

DOI

10.1109/ULTSYM.2011.0420

Filename

6293359