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.
当利用它进行水下目标强度测试时，一个很实际的问题就是怎样区分声源直达声和目标反射回声，快速找出目标特性。
When we use it to test the underwater target strength, one problem is how to discriminate the direct sound of the source with the echo reflected from the target, finding the target character quickly.
对固定的声源深度，发射频率大的声场对应的声强起伏大，且相邻距离处起伏的强度很剧烈；
For a fixed sound source depth, the acoustical fields caused by high send frequency has strong sound intensity fluctuation, and their variation is sharp enough in an adjacent range.
针对不同的声源采取有效的措施，可以降低噪声强度及噪声的传播。
Adequate measures taken pertinently to different sources of the noises will effectively decrease the noise level and retard the propagation of the noise waves.
为了证明系统能够应用于水下声光通信，进行了对水下声源发出的声波频率和强度的探测实验。
To prove the system can be used in underwater acoustooptic communications, with this system, the acoustic frequency and intensity of underwater sound source are detected.
为了证明系统能够应用于水下声光通信，进行了对水下声源发出的声波频率和强度的探测实验。
To prove the system can be used in underwater acoustooptic communications, with this system, the acoustic frequency and intensity of underwater sound source are detected.
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