coefficient of sound damping

Application of acoustic impedance in quality evaluation on well cementation by foamed cement.;

声阻抗技术在泡沫水泥固井质量评价中的应用

Study on the measurement technique on acoustic impedance of pipe flexible components;

管路柔性元件声阻抗测试方法研究

Study on the Key Technologies for Acoustic Impedance Reconstruction of Material with High Accuracy;

材料声阻抗高精度重建关键技术的研究

As an objective diagnostic method, aural acoustic impedance measuring device holds a very important position in diagnosing ear diseases and hearing obstacles.

作为一种客观的诊断方法 ,耳声阻抗测量仪在临床耳疾和听力障碍诊断方面具有重要地位。

Study on impact of buried landmines on earth surface acoustic impedance;

地雷对地表声阻抗率的影响研究

Besides,that the acoustic impedance or ratio of acoustic pressure at the ground surface measured by a sound level meter to the seismic velocity measured by a geophone array was plotted and used to analyze factors affecting the acoustic to seismic coupling.

采用音响作为能量源发射扫频的正弦波声信号穿透到地下土壤;用声级计和地震检波器串分别测得地表的声压级和震动速度,画出二者比值即地面声阻抗率的变化曲线,以此分析声/地震波耦合的效率及其影响因素。

The influence of one-dimension compressible bias flow on the acoustic impedance of perfo-(rated) panels was discussed with consideration of the compressibility of flow.

从理论上研究了一维可压缩偏流对穿孔声阻抗率的影响,并分析了偏流对穿孔粘滞效应的影响;在实验中,利用真空泵流装置建立了存在偏流时的穿孔板声阻抗率测量系统,测量了一定频率范围内两块不同厚度穿孔板在不同偏流流速时声阻抗率的变化规律。