Sound fluctuation in a non-Gaussian random field: A wavelet-based Wiener chaos expansion approach.

Sound fluctuation in a non-Gaussian random field: A wavelet-based Wiener chaos expansion approach. Research Abstract Details 

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Sound fluctuation in a non-Gaussian random field: A wavelet-based Wiener chaos expansion approach. Abstract Text:

Hao Xing,Li Ma,

Recently Wiener chaos derived stochastic expansion methods, especially polynomial chaos (PC), have caught great attention in the underwater acoustics community for its success in modeling random properties of underwater acoustic field. However, most research until now concern a Gaussian random field, while fluctuations in ocean medium are not always Gaussian. For non-Gaussian probability density function (PDF) with a finite support, it is reported that a Wiener chaos decomposition, which use wavelets as basis functions instead of orthogonal polynomials, is more suitable than PC. This paper concentrates on non-Gaussian high frequency internal waves [T. Wang and T. Gao, Chin. J. Ocean. Limnol. 20, 16-21 (2002)] and presents a multi-resolution stochastic expansion approach to handle acoustic field fluctuation in a non-Gaussian internal wave field. The depth dependent PDF of sound speed fluctuation is determined empirically from experiment results. Spatial coherence function and scintillation index of acoustic field were calculated for Gaussian and non-Gaussian cases. In addition, a comparison between both situations was made, which shows that in the non-Gaussian case, the acoustic field has a more complex coherence structure. [Work partially supported by NSFC.].

Sound fluctuation in a non-Gaussian random field: A wavelet-based Wiener chaos expansion approach. Publishing Authors By Initials

H Xing,L Ma,

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Sound fluctuation in a non-Gaussian random field: A wavelet-based Wiener chaos expansion approach. Journal Published:

PUBLICATION TYPE: Journal Article

Journal: The Journal of the Acoustical Society of America

VOLUME: 122

Page Numbers: 2975

Journal Abbreviation: J. Acoust. Soc. Am.

ISSN: 1520-8524

DAY: 14

MONTH: Nov

YEAR: 2007

Sound fluctuation in a non-Gaussian random field: A wavelet-based Wiener chaos expansion approach. Information

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LANGUAGE: eng

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Grant and Affiliation Information for Sound fluctuation in a non-Gaussian random field: A wavelet-based Wiener chaos expansion approach.

AFFILIATION: Inst. of Acoust., Chinese Acad. of Sci., 21 Bei Si Huan Xi St., Beijing 100080, P. R. China.

Country: United States

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MEDLINETA: J Acoust Soc Am

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