A special nomograph designed for calculating the normal specific acoustic impedance is proposed.
本文提出一种为计算法向声阻抗率而设计的专用列线图。
Applying laboratory acoustic emission Technology, in the light of specific requirements and conditions of coal mine rock sound monitor, this peper has developed a set of system for rock sound monitor.
本文介绍了应用实验室声发射测量技术结合煤矿地音监测的特殊要求和条件研制的矿山地音监测系统。
Experiments on the test pool and open sea have proved that this simulator could not only transmit acoustic signals like CW and LFM, but also generate ship radiated noise with specific characteristics.
通过水池联调和海上实测验证，表明：模拟器除了能够发射CW、LFM等常用的水声信号外，还能够模拟产生具有特定特征的舰船辐射噪声。
There are a lot of research on the acoustic characteristics of the acoustic emission transducer and its array for the emission energy is concentrated in some specific direction.
在水声方面，为了得到用较小的发射功率探测到更远得距离的目标，使发射能量集中在某些特定方向，人们对水声发射换能器及其基阵的声特性进行了很多研究。
A quality monitoring system has been developed for laser-welded tinplate using specific optic and acoustic signals generated by the plasma during "keyhole" welding.
针对激光小孔效应焊过程中等离子体辐射出特征光并伴随特征声的现象，提出了采用光声信号联合实时监测激光焊接质量的方案。
A quality monitoring system has been developed for laser-welded tinplate using specific optic and acoustic signals generated by the plasma during "keyhole" welding.
针对激光小孔效应焊过程中等离子体辐射出特征光并伴随特征声的现象，提出了采用光声信号联合实时监测激光焊接质量的方案。
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