新型斜截面形状嵌套谐振器的吸声特性研究

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振动与冲击 ›› 2018, Vol. 37 ›› Issue (21) : 190-194.

论文

高南沙，侯宏

作者信息 +

Sound absorption characteristics of a new type oblique-section nested resonator

GAO Nansha，HOU Hong

Author information +

文章历史 +

摘要

设计了斜截面形状的一种新型嵌套谐振器并研究它的吸声特性。阻抗管实验证明了不同的单层结构组合具有可调的低频宽带吸声效应，声吸收机理在于微小结构区域中的空气摩擦和结构共振使声能耗散为热能。声-电类比模型说明吸声峰值和带宽都可以通过改变结构尺寸和组合来实现，本文提出的结构制作简单，在低频吸声工程实践中有一定的指导作用。

Abstract

Here, a new type oblique-section nested resonator was designed and its sound-absorbing characteristics were studied.Impedance tube test results showed that different combinations of single layer structures have a tunable low-frequency wide frequency-band sound-absorbing effect; the sound absorption mechanism is air frictions in micro-structure areas and structural resonances causing sound energy dissipated into heat energy.Acoustic-electric analogy model tests showed that sound absorption’s peak and bandwidth can be improved through changing resonator structures’ size and combinations; the proposed nested resonator is easy to fabricate, and has a guide action in low frequency sound absorption engineering.

导出引用

高南沙，侯宏. 新型斜截面形状嵌套谐振器的吸声特性研究[J]. 振动与冲击, 2018, 37(21): 190-194

GAO Nansha，HOU Hong. Sound absorption characteristics of a new type oblique-section nested resonator[J]. Journal of Vibration and Shock, 2018, 37(21): 190-194

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