【作者】 郭新毅； 李凡； 马力； 陈耀明；

【Author】 GUO Xinyi,LI Fan,MA Li,CHEN Yaoming (Key Laboratory of Underwater Acoustics Environment,Institute of Acoustics,Chinese Academy of Science,Beijing 100190,China)

【机构】 中国科学院声学研究所水声环境特性重点实验室；

【摘要】 根据Kupennan-Ingenito海洋环境噪声模型,得到两个接收水听器单元之间的环境噪声互相关函数。噪声场的相关特性可以类比声场积分公式。研究发现环境噪声的互相关函数与发射-接收两点间声场格林函数积分表达式在形式上有着类比的关系。因此可用噪声场的互谱密度函数代替实际声场来研究传播路径的到达时间结构。本文对垂直阵接收的海洋环境噪声信号的宽带互相关特性进行分析,得出噪声场相关时域图。根据噪声场垂直相关类比声场各传播路径的到达时间来研究垂直阵空间位置以及海底的分层特性。更多还原

【Abstract】 This paper introduces a function of correlation between two hydrophones,basing on the Kuperman-Ingenito ocean ambient noise model.There is a similarity in form between the correlation function and the pressure field from a point source to a receiver.Thus,the correlation function can replace actual acoustic field to research arrival structure of propagation.In this paper,the noise interference pattern can be obtained from cross-spectral density of vertical line array. There are some analyses about physical significance of noise interference basing on compared simulation and experience. This method can be used to research layered sea floor considering the arrival time structure of each propagation route.更多还原