underwater noise

This is caused by the complexity of underwater target radiated noise and the variety condition of the sea.

这是由于水下目标辐射信号和海洋环境的复杂性、多变性造成的。

With the development of acoustic stealth technology, the noise and target strength of underwater target significantly reduced, and the sonar operating range is decreasing accordingly.

现阶段由于声隐身技术的发展，水下目标的辐射噪声和目标强度都大幅降低，声纳的作用距离也随之下降。

Time delay method was used to reconstruct the phase space of underwater noise time series based on nonlinear dynamics theory.

以非线性动力学理论中的相空间重构理论为基础，利用延时法对水下噪声时间序列信号进行了相空间重构。

Local-linear-prediction analysis for underwater acoustic target radiated noise

水声目标辐射噪声的局部线性预测分析

Preliminary modelling of line spectrum for radiated noise induced by high speed counter rotation of underwater vehicle propellers

浅析水下高速航行体对转螺旋桨辐射噪声线谱建模

There are many stories about mass whale and dolphin beachings linked to military activity, sonar, underwater noise caused by shipping vessels, and even pollution.

很多关于大量的鲸鱼和海豚搁浅事件都和军事活动，声纳，货船造成的水下噪音，甚至海洋污染有关。

Bearing effect of underwater noise Ranger and its calibration at sea

水下噪声测距仪的方位效应及其海上校准

First, by using wavelet transform and multiresolution analyses, the modulated envelop of underwater target radiated noise is extracted.

首先，利用小波变换和多分辨率分析理论，提取水下目标辐射噪声的调制包络；