In this paper, the acoustic impact testing method has been presented with two different excitation methods: the tap testing method and the acoustic impedancetesting method.
依据激励方式的不同，本文分别从敲击检测以及声阻检测方法两个方面对声振检测方法进行了介绍。
2
Its hardware and software are introduced by this dissertation. Some main problem such as testing with zero current, impedancetesting, continuous current regulating etc. is the discussed.
本文介绍了它的硬件和软件，并就一些主要问题，如零电流检测、内阻检测及恒流控制等进行了讨论。
3
Soil: investigation and testing. Auscultation of buried work. Part 4: impedance test.