TY  - EJOU
AU  - Yang, Liang 
AU  - Zhang, Jie 
AU  - Xia, Jinfeng 
AU  - Zhang, Siwen 
AU  - Yang,  
AU  - Chu, Zhigang 

TI  - Sound Transmission Loss of Helmholtz Resonators with Elastic Bottom Plate
T2  - Sound \& Vibration

PY  - 2024
VL  - 58
IS  - 1
SN  - 2693-1443

AB  - Helmholtz resonators are widely used to control low frequency noise propagating in pipes. In this paper, the elastic bottom plate of Helmholtz resonator is simplified as a single degree of freedom (SDOF) vibration system with acoustic excitation, and a one-dimensional lumped-parameter analytical model was developed to accurately characterize the structure-acoustic coupling and sound transmission loss (STL) of a Helmholtz resonator with an elastic bottom plate. The effect of dynamical parameters of elastic bottom plate on STL is analyzed by utilizing the model. A design criterion to circumvent the effect of wall elasticity of Helmholtz resonators is proposed, i.e., the structural natural frequency of the wall should be greater than three times the resonant frequency of the resonator to avoid the adverse effects of wall elasticity. This study can provide guidance for the rapid and effective design of Helmholtz resonators.
KW  - Helmholtz resonator; bottom plate elasticity; sound transmission loss

DO  - 10.32604/sv.2024.056968