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引用次数: 1
摘要
正向压力波的复振幅c Bn复杂的反向压力波振幅声速在m /秒d简单室直径m dav平均纤维直径在m dB分贝dh穿孔直径孔m f在赫兹频率Fm方差比k赫兹赫兹波数l简单室长度m LW声功率水平dB马赫数m面积比m N试验P百分比贡献π在pT总压在pT事件压力传播的压力in Pa prms均方根压力Pa Rf流量电阻率S膨胀室截面m Sm纯平方和W声功率通量W W
An Complex Amplitudes of Forward Pressure Wave Bn Complex Amplitudes of Reverse Pressure Wave c Velocity of Sound in m/sec d Diameter of Simple Chamber in m dav Mean Fiber Diameter in m dB Decibel dh Diameter of Perforated Holes in m f Frequency in Hz Fm Variance Ratio Hz Hertz k Wave Number l Length of Simple Chamber in m LW Acoustic Power Level in dB m Area Ratio M Mach Number N Number of Trials P Percent Contribution pi Incident Pressure in Pa pT Total Pressure in Pa pt Transmitted Pressure in Pa prms Root Mean Square Pressure Pa Rf Flow Resistivity S Cross Section of Expansion Chamber in m Sm Pure Sum of Squares W Acoustic Power Flux in watts
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