基于矢量水听器浅海波导中海面噪声场的空间特性研究

Research on the spatial character of surface noise in shallow sea based on vector sensor

矢量水听器能够同时测量声场的声压p(t)和振速的3个正交分量vx(t),vy(t),vz(t)。本文以射线理论为基础,不考虑声线间的相互干涉,将Harrison的噪声场声压相干模型扩展至声压和振速间的相干模型,对基于矢量水听器浅海波导中的海面噪声场的空间特性进行了研究。结果表明,在浅海波导中,海面噪声场的声压p(t)和振速垂直分量vz(t)是强相干的,与振速水平分量vx(t)和vy(t)是不相干的;声速分布对海面噪声场垂直相干特性影响较为明显;海面噪声场的声压和振速的噪声级与声速分布具有较强的相关性。

The vector sensor may measure the sound pressure p（t） and the orthogonal components of the particle velocity,vx（t）,vy（t）,vz（t）.The paper neglects the mutual interference between sound ray and development noise pressure model,researches space correlation of surface noise between the sound pressure p（t） and the three orthogonal components of the particle velocityvz（t）in shallow sea.The results showed that the sound pressure p（t） and the vertical components of the particle velocity vz（t）is correlation,p（t） and the horizontal components of the particle velocity vx（t）,vy（t）is not correlation in shallow sea.Sound velocity profile has obvious effect on vertical coherence of surface noise.Surface noise level of the sound pressure and the particle velocity is correlation with sound velocity profile.