... acoustic discontinuity 声学不连续 acoustic dispersion 声频弥散 acoustic echo repeater 回声重发器 ...
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For clean sandstone, the acoustic dispersion of compressional wave exists obviously when its porosity is more than 28%.
对纯砂岩，当孔隙度大于28%时存在明显纵波声频散。
Based on the results of dispersion experiments on cores of sand and shale, the paper analyzed the variability of acoustic dispersion for dry and water-saturated cores.
结合岩心砂泥岩频散特性实验结果分析了岩心在饱水及干燥状态下声频散的特点。
The existence of various lacunas in bolt bonding system will cause the acoustic wave energy attenuation, phase aberration and frequency dispersion.
由于锚固体系中有不同大小和程度的缺陷，声波在传播过程中将产生能量衰减、相位突变及频散现象。
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