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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。
In this paper, we study some regional specialties of the underwater environment noise in northern Yellow Sea continuously observed for six days and nights. This is mainly reflected in the noise spectrum has a strong, and the frequency spectrum between the same period of similar ups and downs of the same time. Furthermore, the noise level depends on the wind speed relationship is more complicated. For example, in the medium wind speed range (16-30 knots), the change of spectrum level with wind speed will appear “V” shape. This paper presents an improved mathematical model that generalizes the results of Piggott (1964) and Crouch et al. (1972). With this improved model can better describe the noise represented by the “V” shape of the special state.