acoustic ratio

Based on acoustic characteristics of cough, using the short time zero crossing ratio ( ZCR) identifies the suspicious coughs in order to get the threshold of short time energy.

利用过零率来定位可疑咳嗽，从而确定能量阈值。

Porosity parameters, ratio of acoustic wave time difference K4, ratio of density K5, neutron relative porosity K6;

孔隙测井特征参数（包括声波时差比K4、密度比K5、中子相对孔隙度K6）；

acoustic malfunction acoustic matching layer acoustic ratio acoustic releaser acoustic thermometer

声波测井仪声失效声匹配层声比

Conclusion Between biaural and monaural acoustic stimulation VEMP, there are no significant differences in provocation rate, latency, but there are marked differences in amplitude, interaural amplitude ratio, interaural latency difference and interaural asymmetric ratio.

结论单侧给声侧、双侧短纯音刺激VEMP的引出率、潜伏期无明显差异，但振幅、耳间潜伏期差、耳间振幅比和耳间不对称率均有显著性差异。

The Y value of acoustic emission load/ unload ratio descend to 1 when rock reach final elastic deformation can be seen as precursory characteristic for rock failure.

声发射数加卸载响应比在岩石弹性变形阶段后期下降到1，可以作为岩石失稳破坏的前兆。

Under cycling loading, rock damage and AE events in unload phase is increasing more quickly than load phase with load increasing. The Y value of acoustic emission load/ unload ratio descending gradually.

随着载荷的增加，岩石在卸载过程中的损伤和声发射事件较加载过程增加更快，声发射数加卸载响应比Y值逐渐减低。