周期性管道亥姆霍兹共振器系统的噪声控制区

Noise control zone for a periodic ducted Helmholtz resonator system.

作者信息

Cai Chenzhi, Mak Cheuk Ming

机构信息

Department of Building Services Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, China

出版信息

J Acoust Soc Am. 2016 Dec;140(6):EL471. doi: 10.1121/1.4968530.

DOI:10.1121/1.4968530

PMID:28040005

Abstract

This paper presents a theoretical study of the dispersion characteristics of sound wave propagation in a periodic ducted Helmholtz resonator (HR) system. The predicted result fits well with a numerical simulation using a finite element method. This study indicates that for the same system, no matter how many HRs are connected or what the periodic distance is, the area under average transmission loss T L¯ curves is always the same. The broader the noise attenuation band, the lower the peak attenuation amplitude. A noise control zone compromising the attenuation bandwidth or peak amplitude is proposed for noise control optimization.

摘要

本文对声波在周期性管道亥姆霍兹共振器（HR）系统中传播的色散特性进行了理论研究。预测结果与使用有限元方法的数值模拟结果吻合良好。该研究表明，对于同一系统，无论连接多少个HR或周期距离是多少，平均传输损耗TL¯曲线下的面积始终相同。噪声衰减带宽越宽，峰值衰减幅度越低。为了优化噪声控制，提出了一个兼顾衰减带宽或峰值幅度的噪声控制区域。