The structure provides a lumped acoustic impedance having an acoustic resistance proportional to frequency, and an acoustic inertance that is inversely proportional to frequency.
该结构提供了一个集总声阻抗具有声波电阻与频率成正比，和声学惰性是与频率成反比。
The experimental results show that acoustic resistance of perforated plate is related to plate thickness, aperture diameter, numbers of aperture, acoustic frequency and airflow velocity.
研究表明：穿孔板的声阻与孔板厚度、孔径、穿孔数目、声波频率和气流速度等因素有关。
At present, electric resistance, chloride ion concentration anomaly, chloride ion profile and acoustic impedance logging data can be used to predict the gas hydrate saturation.
目前电阻率和氯离子浓度异常、氯离子剖面以及声阻抗测井数据均可预测水合物饱和度。
The acoustic radiation resistance matrix is combined with the velocity vector on a vibration surface to predict the total sound power radiated from the structure.
利用声辐射阻力矩阵和振动面上的速度矢量预报了结构声辐射的总功率。
Good agreement is obtained between the theoretical prediction and the experimental data both for the acoustic resistance and reactance.
理论预测的声阻和声抗与实验结果吻合良好。
The acoustic radiation resistance matrix is combined with the velocity vector on a vibration surface to predict the total sound power radiated from the structure.
基于声辐射模态分析，建立了外部场压和结构表面振动速度之间关系的传递矩阵。
The 3-d numerical methods are used to predict the acoustic attenuation performance and flow resistance characteristics of internal combustion engine exhaust silencers.
使用三维数值计算方法预测内燃机排气消声器的声学性能和阻力特性。
It is shown that the attenuation coefficient will decrease obviously with the increase of Mach number, and the nonlinear acoustic resistance and acoustic mass will reduce slightly.
研究表明，随着气流马赫数的增加，吸声结构的消声系数明显下降，微穿孔板的非线性声阻和声质量修正值都略有减少。更需注意，在高速流条件下吸声结构的共振峰将会发生偏移。
At present, electric resistance, chloride ion concentration anomaly, chloride ion profile and acoustic impedance logging data can b...
目前电阻率和氯离子浓度异常、氯离子剖面以及声阻抗测井数据均可预测水合物饱和度。
At present, electric resistance, chloride ion concentration anomaly, chloride ion profile and acoustic impedance logging data can b...
目前电阻率和氯离子浓度异常、氯离子剖面以及声阻抗测井数据均可预测水合物饱和度。
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