木质装饰微孔板声学特性的预测

Prediction of acoustical characteristics of wooden micro-perforated panels

摘要: 对一种木质装饰微孔板的声学特性进行了理论预测,导出了各项结构参数与表面声阻抗率和法向吸声系数之间的关系。与驻波法的实验结果比较表明,两者良好吻合。通过预测可以得出木质微孔板的开槽深度,条纹宽度与间隔等对吸声性能的影响,从而优化其结构。这种木质微孔板特别适用于厅堂的音质设计,它可以兼顾室内装饰和声学处理两种效果。

Abstract: Sound absorption characteristics of wooden micro-perforated panels are theoretically predicted.Predictions of sound absorption coefficient and impedance are well consistent with the measurement results in impedance tube.The factors affecting the absorption characteristics of such wooden micro-perfor-ated panels are further discussed.And it is especially recommended to use them in auditorium acoustics design due to good performances in both interior decoration and acoustics.