腔壁弹性对充水亥姆霍兹共振器声学特性的影响：圆柱形腔等效集中参数模型

Effect of elastic cavity walls on acoustic characteristics of a water-filled Helmholtz resonator:equivalent lumped parameter model for cylindrical cavity

研究了充水亥姆霍兹共振器的弹性壁对其声学特性的影响。建立了考虑壁面弹性的圆柱形共振器的等效集中参数理论模型,并在静水管路上进行了实验验证。从共振器的共振频率、激励声压与腔内声压的传递函数以及共振器的传递损失等方面阐述了弹性壁的影响,并对刚性壁假设和弹性壁结果进行了比较。理论和实验都证明了腔壁弹性对亥姆霍兹共振器的声学特性有很大的影响。

Effect of elastic cavity walls on acoustic characteristics of a water-filled Helmholtz resonator is investigated. A theoretical model based on equivalent lumped parameter assumption is developed to take into account the elasticity of the cylindrical cavity walls. The resonance frequency of the Helmholtz resonator, transfer-function between excited pressure and cavity pressure, and sound transmission loss along a water-filled duct connected with the elastic Helmholtz resonator are studied. An experiment is also carried out on the Helmholtz resonator to validate numerical predictions. The differences between rigid and elastic cavity walls are presented. Both theoretical and experimental results conclude that the elasticity of cavity walls significantly affect the acoustic performance of the Helmholtz resonator.