文献类型：期刊文献

英文题名：A spatial correlation model for the horizontal non-isotropic ocean ambient noise vector field

作者：Zhou, Jianbo[1];Piao, Shengchun[1];Huang, Yiwang[1];Zhang, Shizhao[1];Qu, Ke[2]

机构：[1]Harbin Engn Univ, Coll Underwater Acoust Engn, Sci & Technol Underwater Acoust Lab, Harbin, Peoples R China;[2]GuangDong Ocean Univ, Coll Elect & Informat Engn, Zhanjiang, Peoples R China

年份：2017

卷号：36

期号：2

起止页码：124

外文期刊名：JOURNAL OF LOW FREQUENCY NOISE VIBRATION AND ACTIVE CONTROL

收录：SCI-EXPANDED(收录号：WOS:000404160800003)、、EI(收录号：20173003977679)、Scopus(收录号：2-s2.0-85025170131)、WOS

基金：The author(s) disclosed receipt of the following financial support for the research, authorship, and/or publication of this article: This work was supported by the Science and Technology Foundation of State Key Laboratory, China (Grant No. 9140C200103120C2001), the Natural Science Foundation of GuangDong province under the contract 2014A030310256.

语种：英文

外文关键词：Horizontally stratified medium; noise vector field; spatial correlation; Von Mises distribution

外文摘要：The ocean ambient noise is one of interference fields of underwater acoustic channel. The design and use of any sonar system are bound to be affected by ocean ambient noise, so to research the spatial correlation characteristics of noise field is of positive significance to improving the performance of sonar system. Only wind-generated noise is considered in most existing ambient noise models. In this case, the noise field is isotropic in horizontal direction. However, due to those influencing factors, like rainfall, ships and windstorm, etc. for a real ocean environment, noise field becomes anisotropic horizontally and the spatial structure of ambient field also changes correspondingly. This paper presents a spatial correlation of the acoustic vector field of anisotropic field by introducing Von Mises probability distribution to describe horizontal directivity. Closed-form expressions are derived which relate the cross-correlation among the sound pressure and three orthogonal components of vibration velocity, besides, the influence of the non-uniformity of noise field on the correlation characteristics of noise vector field was analysed. The model presented in this paper can provide theoretical guidance for the design and application of vector sensors array. Furthermore, the achievement could be applied to front extraction, Green's function extraction, inversion for ocean bottom parameters, and so on.