基于单矢量水听器的海洋环境噪声方向性分析方法研究

Research on the method of the ocean environment noise directivity estimate base on single Vector Hydrophone

海洋环境噪声场方向性是信号处理中背景噪声抑制的基础。本文基于矢量水听器研究了海洋环境噪声方向性分析方法以及各向异性的表征方法,分析了背景噪声方向性与矢量水听器对背景噪声抑制能力的关系,并利用北黄海海域单矢量水听器获取的海洋环境噪声数据,对海洋环境噪声方向性分析方法进行了试验验证。结果表明:不同频段的海洋环境噪声场水平各向异性程度差异显著;海洋环境噪声水平方向性在特定频段内具有显著的不均匀性,且其方向性与航船分布情况一致。

The ocean environment noise directivity is a base for background noise inhibition in signal processing. We do research for the method of the directivity analyse in ocean environment noise field and anisotropic token base on single Vector Hydrophone. Analysed the relationship between the background noise directivity and background noise inhibition ability by Vector Hydrophone. Do experiment of the method of the level directivity analyse base on the data of ocean environment noise in north Yellow Sea by Vector Hydrophone. There are two results that one is level anisotropy degree difference in ocean environment noise field is prominence in difference frequency, the other is the inhomogeneity of the ocean environment noise level directivity is prominence in some special frequency, which is the same as the ship distributing.