The amount of time for a wave to travel a certain distance, proportional to the reciprocal of velocity, typically measured in microseconds per foot by an acoustic log and symbolized by tor DT.
波在某段距离传播的时间，与速度的倒数成正比，在声测井中，以每英尺多少毫秒来量度，用符号t或DT表示。
The rock acoustic parameters in this paper include wave amplitude, spectral amplitude, spectral area, spectral density, wave velocity and attenuation coefficient etc.
这些岩石声学参数为波幅、谱幅、谱面积、谱密度、波速度、衰减系数等。
The experiments also showed that the effect of thermal cracking on wave velocity is related closely with that on acoustic emission discovered by other authors.
实验同时表明岩石热开裂的波速效应，与过去被其他作者发现的热开裂声发射效应之间有着密切的关系。
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