This thesis is focused on the separation vehicle acoustic signal.

本文主要是对车辆的声频噪声信号进行分离研究.

Precise locating needs to detect the acoustic signal of the pipe leaks that has close relationship with the acoustic impedance of the leaks.

准确定位漏点须对漏损管道的声信号进行研究，而漏损管道的声信号与漏损点的声阻抗密切相关。

The core problem of this thesis is to study the different acoustic signal identification methods.

本论文的核心就是研究不同地声目标识别方法.

The results show that the main frequency of the acoustic signal increases with the shape change of the ripple spring located under the slot wedge.

研究表明在波纹板的弹性范围内，随着波纹板形变量的加大，测得的声信号能量谱图中主频率值逐渐增加。

The underwater acoustic signal can cause surface wave motion at the water-air interface and hence modulate the magnitude of the laser beam falling on the water surface.

水下声信号在水-空气界面会引起表面波动而对打在水表面的激光进行调制。

The system works in active mode. The theoretical and simulation analysis about acoustic signal processing in multi-path channel and the engineering software design are given in the dissertation.

该系统采用主动工作方式，本文系统地研究了在多途信道中对声学信号进行处理的理论研究和仿真分析及工程软件设计。