Model of the phase screen for nonlinear acoustic waves [atmosphere]

Author

Khokhlova, V.A. ; Rudenko, O.V.

Author_Institution

Dept. of Acoust., Moscow State Univ., Russia

Volume

1

fYear

1995

fDate

7-10 Nov 1995

Firstpage

597

Abstract

Theoretical approach for the description of nonlinear acoustic waves transmitted through randomly inhomogeneous thin layer (phase screen) is presented. An exact analytical solutions of governing equations are obtained both for the spatial structure of the field behind the screen and for the temporal waveform. Using this model statistical characteristic of a single N-pulse having passed through the screen is studied. The influence of the random focusing and defocusing effect on the statistical properties of N-wave behind the screen is analyzed. Distribution functions for the shock amplitude, overpressure probability density, and ray convergency are presented. It is shown that the spatial modulation of the phase front affects the average characteristics of the field and causes the strong variations of the wave field parameters

Keywords

acoustic field; acoustic focusing; acoustic wave transmission; atmospheric acoustics; meteorology; nonlinear acoustics; shock waves; N-pulse; average characteristics; defocusing; distribution functions; exact analytical solutions; nonlinear acoustic waves; overpressure probability density; phase front; phase screen; random focusing; randomly inhomogeneous thin layer; ray convergency; shock amplitude; spatial modulation; spatial structure; temporal waveform; wave field parameters; Acoustic distortion; Acoustic propagation; Acoustic waves; Atmosphere; Electric shock; Equations; Nonlinear acoustics; Nonlinear distortion; Phase distortion; Phase modulation;

fLanguage

English

Publisher

ieee

Conference_Titel

Ultrasonics Symposium, 1995. Proceedings., 1995 IEEE

Conference_Location

Seattle, WA

ISSN

1051-0117

Print_ISBN

0-7803-2940-6

Type

conf

DOI

10.1109/ULTSYM.1995.495647

Filename

495647