【作者】 吴萌； 黄益旺； 张春月；

【Author】 WU Meng;HUANG Yi-wang;ZHANG Chun-yue;Science and Technology on Underwater Acoustic Laboratory,Harbin Engineering University;College of Underwater Acoustic Engineering,Harbin Engineering University;

【机构】 哈尔滨工程大学水声技术重点实验室； 哈尔滨工程大学水声工程学院；

【摘要】 海洋环境噪声是水声信道中的一种干扰背景,研究海洋环境噪声的目的一是为了提高被动系统的检测和识别能力,二是为了提高我方设备的隐蔽性。本文通过对2017年北黄海海域布放的垂直阵获得的海洋环境噪声数据进行处理,研究了海洋环境噪声场的空间相关特性。通过数据处理,获得了不同时刻的相关系数、相干系数随深度的变化曲线。从数据处理结果可知,相关系数曲线在频率较低的情况下起伏较大而在频率较高时比较光滑,在傍晚时分相关系数明显区别于其他时间段。相干系数在频率较低的情况下明显较高而高频情况下明显较低,同时在傍晚时分与凌晨时分的相干系数低于其他时间段。更多还原

【Abstract】 The ocean ambient noise is an interference background in underwater acoustic channels,the purpose of studying the ocean ambient noise is to improve the detection and recognition capabilities of passive systems,and to improve the concealment of the target itself.In this paper,the spatial correlation characteristics of the ocean ambient noise field are studied by processing the ocean ambient noise data obtained from the vertical array of the North Yellow Sea in 2017.Through the data processing,obtained the correlation coefficient and the coherence coefficient with depth at different times.It can be seen from the data processing results that the correlation coefficient curve is more fluctuating at a lower frequency and smoother at a higher frequency,and the correlation coefficient is significantly different from other time periods in the evening time.The coherence coefficient is significantly higher at lower frequencies and significantly lower at high frequencies,while the coherence coefficient in the evening time and early morning is lower than other time periods.更多还原