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。
Based on the wavelet transformation and the theory of modal acoustic emission, the dispersion of guided wave propagated in thin plate was investigated by acoustic emission experiment.
基于小波变换和模态声发射理论，通过模态声发射试验的方法确定了管道中导波传播的频散特性。
Due to the multi modes and dispersion nature of acoustic emission (AE) propagating in pipeline, traditional cross correlation technique do not perform well for acoustic leak location.
由于泄漏声发射信号的多模态特性和在管道内传播过程中的频散特性，使得通过相关分析进行管道泄漏定位的效果很差。
The dispersion equation of structure acoustic coupling system for fluid filled pipes surrounded by elastic media under axisymmetric motion was derived from shell dynamic equation.
从壳体基本运动方程出发，导出了弹性介质中的充液管道在轴对称运动下声振耦合系统的频散方程。
Then the article discusses forward modeling based on acoustic wave higher difference, then analyzes numerical dispersion including time and spatial dispersion and presents its stability conditions.
接着，简要介绍了基于声波高阶差分的多次波正演模拟方法，分析了这种方法的数值频散问题，包括时间和空间频散，同时给出了它的稳定性条件。
Acoustic reflector is widely used in dome speaker for sound energy dispersion redistribution.
声反射器广泛用于高音扬声器的指向性控制。
Acoustic reflector is widely used in dome speaker for sound energy dispersion redistribution.
声反射器广泛用于高音扬声器的指向性控制。
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