摘要
本文分析了负跃层浅海中的一次声传播实验。爆炸声源位于跃层之下，两个接收水听器分别位于跃层上、下。在远距离处跃层上水听器接受到的信号由两部分组成：从声源直接传播到接收点的多途信号（穿透波）和一个随后到达的强度比前者大得多的信号（散射波）。通过理论计算和数值拟合，我们认为后者是跃层下传播的声波激发的海底散射信号，这部分信号不但可应用于远距离传输，而且还可能用来反演三维海底散射的有关参数。
Data of a sound propagation experiment in shallow water with a thermocline have been analysed.In the experiment explosive charges were detonated under the thermocline and two hydrophones were located respectively above and below the thermocline. At long ranges the signals received by the upper hydrophone are composed of two pats: signal propagating from the source to the receiver, which is consistant with the normal-mode calculations, and a late arriving stronger signal which however does not show up in the calculations. This latter pat of the signal can be explained by considering the bottom scattering induced by the sound waves propagating under the thermocline. In addition, from this pat of the signal it is possible to estimate the three dimensional bottom scattering characteristics.
出处
《声学学报》
EI
CSCD
北大核心
1996年第6期905-911,共7页
Acta Acustica
基金
国家自然科学基金
