在衰减振荡中，两个相邻同方向幅值之比称为衰减比。前一幅值为分子，后一幅值为分母。衰减比是衡量稳定性的指标。若衰减比小于1：1，则振荡为扩散的，系统为不稳定的；为保证足够稳定裕度，衰减比以4：l至10：1为宜。
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基本原理是声波信号在胶结存在时的衰减比胶结差时的要大。
The fundamental principle is that the acoustic signal will be more attenuated in the presence of cement than if the casing were uncemented.
水中冲击波压力峰值在炮孔轴线上衰减比垂直于炮孔轴线向上衰减慢。
The peak pressure attenuation of shock in water in borehole axis direction was slower than the direction vertical to the borehole axis.
经研究发现热弛豫模型的衰减比BISQ模型大得较多，与地球介质相比衰减量也过大；
The attenuation of thermal relaxation model is much higher than BISQ model, and also higher than the attenuation of earth medium.
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