体积噪声矢量场空间相关特性研究的一种方法  

Research on spatial correlation in an acoustic vector noise field

作　　者：黄益旺 杨士莪 朴胜春 

机构地区：[1]哈尔滨工程大学水声技术国防科技重点实验室

出　　处：《哈尔滨工程大学学报》2009年第11期1209-1212,共4页Journal of Harbin Engineering University

基　　金：国防科学技术工业委员会基础研究基金资助项目(5132102ZZT22);水声技术国防科技重点实验室基金资助项目(9140C2002070605)

摘　　要：确定噪声场的相干结构对分析矢量水听器阵信噪比增益非常重要.建立了一个三维的噪声源在球面上均匀分布的各向同性噪声模型,研究了噪声场中声压与质点振速3个正交分量的自相关和互相关特性,推导得到了窄带噪声场空间相关系数的解析表达式以及单矢量水听器接收噪声的协方差矩阵.基于三维噪声场的空间相关函数,讨论了矢量水听器线阵的某些应用及其输出信噪比增益.数值算例表明,该三维噪声场空间相关特性模型可方便地应用于任意形状的基阵在任意姿态下的信噪比输出的获取.An important problem when analyzing the signal-to-noise ratio （SNR） of the output of a vector hydrophone array is determining the correlation structure of the noise field. A three-dimensional and homogeneously isotropic noise field was modeled with omnidirectional noise sources homogeneously distributed on a spherical surface. Auto-correlation and cross-correlation between acoustic pressure and three orthogonal components of particle velocity were investigated. Analytic expressions for spatial correlation of a narrow-band noise field and the noise covariance matrix of a single vector hydrophone were obtained. Based on the spatial correlation functions of the 3D field, applications and the SNR output of the linear vector hydrophone array were seen. Numeric examples showed that the model could be conveniently used to get the SNR of the output of any shape of hydrophone array in all the position.

关 键 词：声矢量传感器 空间相关系数 均匀各向同性噪声 声压与质点振速 信噪比 

分 类 号：P733.2[天文地球—物理海洋学]