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.

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。

Some parameter of linear compressor, such as moving mass, spring stiffness, working frequency and acoustic load, are investigated in detail in numerical analysis, and it provides some guidelines for designing an efficient linear compressor.

在数值计算方面细致地考察了线性压缩机各参数，如动质量、弹簧刚度、频率响应以及声学负载等参数的影响，为实际模型的设计提供了参考。

The working frequency of a thermoacoustic engine has effect on the matching mode of engine with the acoustic load.

热声发动机工作频率关系到与负载的匹配情况，是热声发动机声能输出的重要评价指标。

Investigation on Fast Reconstructing Reflection Coefficient from Big Acoustic Material Samples by NAH

声学材料大样声反射系数声全息快速反演方法研究

Rubber is an important underwater acoustic material.

橡胶是一种重要的水声学材料。

A Research on the Acoustic Material Based Polyurethane Hybrid Composite Foam

聚氨酯杂化复合泡沫体声学材料的研究

Primary Study of Bending Resonance Test Method of Acoustic Material Damping Property

声学材料阻尼性能弯曲共振试验方法初探

First of all, design of acoustic material.

第一，声学材料的设计。

So, it is important to do research on the acoustic material.

因此吸声材料和结构的研究对噪声控制具有重要意义。

Acoustic material and heat-resisting heat-storing material is filled in the porous inner tube and the housing body.

在多孔内管和外壳体中间填充有吸音材料和耐热蓄热材料。

To use ceramisite in acoustic material for underground tunnel

利用陶粒制备地铁吸音材料

Acoustic measurement and analysis in Nanjing Subway Engineering Investigation

南京地铁工程勘察中声波测试与分析

Study on the Calibration Technology of the Acoustic Measurement of Suspended Sediment Concentration

声学方法监测悬浮物浓度的定标技术研究

Simulation of underwater acoustic measurement system cable interference voltage

水声测量系统信号线缆干扰电压的仿真计算

On the acoustic measurement method of rock mass stresses

岩体地应力声波测试方法的探讨

Acoustic measurement and spectral characteristic analysis of two kinds of pulse signal

两种脉搏信号的声学检测与谱特征分析

Experimental Research on Reconstruction of Velocity Field in Furnace Using Acoustic Measurement

声波法重建炉膛速度场的实验研究

A multi-line array shape measurement method based on acoustic measurement

一种基于声学测量的多线阵阵形监测方法

Research on application of spectrum analysis in acoustic measurement of seabed sediments

海底沉积物声学测量中频谱分析方法应用研究

On the Acoustic Power Radiated by an Electrical Machine

电机电磁噪声的辐射声功率