Thus it offers theoretical and experiment basis for NDT of the defect like foundation void by means of acoustic features.
为用声学特征进行地基脱空等缺陷无损检测提供了理论和实验依据。
Based on wave propagation theory, the paper describes briefly basic principle of several acoustic propagation models, and discusses detailedly foundation of coupled normal mode.
在波动传播理论的基础上，简要介绍了几种主要声传播模型的基本原理，并着重对简正波模型进行了研究。
This paper introduces the rock acoustic wave test in protective layer of dam foundation in Fenhe Secondary Reservoir and conducts more detailed analysis on the test result.
文中介绍了汾河二库基坑保护层开挖中对基岩的声波测试，着重对测试结果进行了较详细分析。
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