基于深海会聚区声强匹配处理的声源定位方法

A method of sound source localization based on matching the sound intensity in deep-sea convergence zone

匹配场处理技术(Matched Field Processing MFP)近年来在声源被动定位、海洋环境声学参数反演等方面得到广泛的应用。根据深海声道中声场的会聚现象,提出了一种基于深海会聚区声强匹配处理(Matched Convergence Intensity Processing,MCIP)的深海声源定位方法。当声源和接收水听器处在会聚区深度范围内时,MCIP方法利用单个水听器即可实现声源距离和声源深度估计。对单个水听器的实测信号进行相位补偿到会聚区距离上,得到实测场声强,与拷贝场会聚区声强进行相关计算并搜索峰值来确定声源位置。数值仿真实验验证了MCIP方法,并分析了环境失配情况下MCIP的估计性能。

Matched field processing （MFP） is widely used for sound source localization and acoustic parameter inversion of marine environment in recent years. Depending on the convergence zone phenomenon in deep-sea channel, the paper proposes a method of sound source localization based on matched processing of the sound intensity in deep-sea convergence zone. This method is called ＇matched convergence intensity processing （MCIP）＇, which can just rely on a single hydrophone to estimate the distance and depth of the sound source in the case where the source and the receiver are both in the range of convergence zone. The actual intensity can be measured by phase compensation to the signal received by hydrophone. Accordingly the source location can be determined by searching the peak value of the correlation coefficients of the actual sound intensity and the sound intensity in the convergence zone of the copy field. This method is verified by numerical simulation and its applicability in the case of marine environmental mismatch is analyzed.