Department of Mechanical and Aerospace Engineering, University of California, Irvine, California 92697, USA.
J Acoust Soc Am. 2013 Aug;134(2):1090-101. doi: 10.1121/1.4812271.
A study has been conducted on the transmission loss of perforated plates at normal incidence. The investigation includes a theoretical analysis of the problem with validation through experimentation. The experiments comprised microphone measurements of transmission loss for 11 perforated plates with variable thickness, hole size, and porosity. The theoretical model is based on planar wave propagation through a single contraction/expansion chamber with modifications to account for hole interaction effects. The resulting formula for transmission loss yields superior predictions over past theories for the range of properties investigated. Deviations between experimental measurements and theoretical predictions of transmission loss are less than about 1.5 dB for dimensionless hole diameter d/λ < 0.5. The accuracy of the model does not show a strong dependence on plate thickness-to-diameter ratio or porosity.
已经对正入射时穿孔板的传输损耗进行了研究。该研究包括通过实验验证的理论分析。实验包括通过麦克风测量 11 个具有不同厚度、孔径和孔隙率的穿孔板的传输损耗。理论模型基于平面波通过单个收缩/扩张室的传播，对孔相互作用效应进行了修正。得到的传输损耗公式在研究的范围内优于过去的理论预测。对于无量纲孔直径 d/λ<0.5，实验测量值与传输损耗理论预测值之间的偏差小于 1.5dB。该模型的准确性并不强烈依赖于板厚与直径比或孔隙率。
