Yu Ganghua, Li Deyu, Cheng Li
Department of Mechanical Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, SAR of China.
J Acoust Soc Am. 2008 Dec;124(6):3534-43. doi: 10.1121/1.2996328.
The effect of internal resistance of a Helmholtz resonator on acoustic energy reduction in an enclosure and the multimodal coupling-based Helmholtz resonator design are investigated. Using the analytical solution of a resonator-enclosure interaction model, an energy reduction index is defined in a frequency band to optimize the resonator resistance. The dual process of energy dissipation and radiation of the resonator is quantified. Optimal resistance of the resonator and its physical effect on the resonator-enclosure interaction are numerically evaluated and categorized in terms of frequency bandwidths. Predictions on the resonator performance are confirmed by experiments. Comparisons with existing models based on different optimization criteria are also performed. It is shown that the proposed model serves as an effective design tool to determine the internal resistance of the resonator in order to achieve sound reduction in the frequency band enclosing acoustic resonances.
研究了亥姆霍兹共鸣器的内阻对封闭空间内声能降低的影响以及基于多模态耦合的亥姆霍兹共鸣器设计。利用共鸣器 - 封闭空间相互作用模型的解析解，在一个频带内定义了一个能量降低指标以优化共鸣器的电阻。对共鸣器的能量耗散和辐射的双重过程进行了量化。通过数值评估并根据频率带宽对共鸣器的最佳电阻及其对共鸣器 - 封闭空间相互作用的物理效应进行了分类。通过实验证实了对共鸣器性能的预测。还与基于不同优化标准的现有模型进行了比较。结果表明，所提出的模型是一种有效的设计工具，可用于确定共鸣器的内阻，以便在包含声学共振的频带内实现降噪。
