用传递矩阵法预测单层或多层微孔板的吸声性能

Prediction of sound-absorbing performance of single or multi-layered microperforated panels using the transfer matrix method

提出用实验测得含不同孔径孔的微孔板声阻抗率来预测由其形成的单层或多层微孔板的吸声特性,并用传递矩阵法来预测该微孔板的各种组合结构的整体吸声性能。采用该方法获得的微孔板吸声性能曲线与实测结果相当接近。能较好地预测各种组合微孔板的吸声性能。表明传递矩阵法是预测较复杂形式微孔板结构吸声性能的一种有效的方法。

To provide a method that can be used to predict single or multi-layered Microperforated Panel （MPP） performance precisely, especially when the MPP has holes of different diameter and irregular shape. The authors use the specific acoustic impedance of MPP which needs to be measured beforehand in the approach, and then, the transfer matrix method is employed to predict the sound-absorbing performance of single or multi-layered MPP. It is shown that this approach can predict the performance of MPP accurately.