籍助对舰船噪声通过特性信号的时频分析，得到了若干典型舰船的噪声源强度谱纵向分布特性。
The longitudinal distributions of source intensity spectrum of several typical ships is given on the basis of time frequency analysis of the passage signature of ship radiated noises.
结果表明，提高声源强度、降低重力水平或者采用密度大声速小的气体介质有利于提高声悬浮能力。
The calculated results show that strong vibrating source, low gravitational level and sound medium with large density and small sound speed will enhance the levitation ability.
在声源、目标和接收机之间呈复杂的三角形关系条件下，找到了目标强度与入射角、分置角之间的关系。
When the configuration of source, target and receiver has complicated triangular relationship, the relationship among target strength, incidence angle and bistatic angle is obtained.
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