SPECIAL FEATURE OF UNDERWATER AMBIENT NOISE IN NORTHERN HUANGHAI SEA AND ITS DEPENDENCE ON WIND SPEED     

杭汝衡  孟龙  王协成  陈文祥 《海洋学报(英文版)》1984,3(4):462-470

The local special feature of underwater ambient noise in the northern Huanghai sea has been investigated. The results obtained from the analysis of data measured for six days and nights have shown that the time-varying characterization of ambient noise spectrum level is remarkable and its fluctuation at every analyzed frequency band presents an equiform periodicity varying with time synchronously. The dependence of average ambient sea noise spectrum level on logarithmic wind speed within the middle range (16-30 knot) appears in "V" form.The current Crouch's conclusion (1972) has been developed by us to be a mathematical model based on the segment correlation regression. Using this model to describe and expain the characterization of local ambient sea noise is available.  相似文献   

声呐浮标遥测水下声传播衰减     

杭汝衡  孟龙  王协成 《热带海洋学报》1985,(4)

在研究海水中声传播的问题时,声传播损失TL是一个最基本的物理量。近年来随着海洋声学遥感的兴起,对TL的研究更具有重要意义。而将海底地层介质包括在内的声传播的研究,可应用到海底地质勘探中去。  相似文献   

黄海北部海洋环境噪声特点及其与风速的依赖关系   总被引：1，自引：0，他引：1  

杭汝衡  孟龙  王协成  陈文祥 《海洋学报》1984,6(2):151-159

本文研究了六昼夜连续观测到的黄海北部水下环境噪声的一些地域特殊性.这主要表现在噪声谱级具有较强烈的,并且各频率谱级之间存在的同期相似起伏的时变性.再者就是噪声谱级依赖于风速关系比较复杂.例如在中等风速范围(16-30节)内,谱级随风速增长的变化会出现“V”字形特征.本文提出一个改进了的数学模型,推广了Piggott(1964)和Crouch等(1972)的结果.用此改进了的模型能较好地描述噪声所表现的诸如“V”字形的特殊状态.  相似文献