Noise attenuation performance of multiple helmholtz resonator arrays system

Chenzhi Cai, Cheuk Ming Mak, Yi Jing Chu, Xu Wang

Research output: Chapter in book / Conference proceedingConference article published in proceeding or bookAcademic researchpeer-review

Abstract

This paper focuses on improving the noise attenuation performance of a ducted Helmholtz resonator (HR) arrays system. The noise attenuation performance achieved by the HR system is fairly depended on the number of HRs, which is limited by the available space for HR's installation. Two cases are investigated: the periodic ducted HR system and the multiple HR arrays system. The multiple HR arrays system is based on the periodic system by adding identical resonators on the cross-section. Several identical resonators mounted on the same cross-section is considered as one unit in the system, the resonance frequency of the unit is the same as a single resonator. The transfer matrix method and the Bragg theory are used to investigate the wave propagation in the multiple HR array system and the periodic ducted HR system theoretically. The theoretical prediction results fit well with the Finite Element Method (FEM) simulation results. The results show that different arrangement of the HRs mounted on the duct has no effect on the TL once the number of HRs and the periodic distance are both the same. The proposed multiple HR array system has potential application in noise control with space limitation.
Original languageEnglish
Title of host publication24th International Congress on Sound and Vibration, ICSV 2017
PublisherInternational Institute of Acoustics and Vibration, IIAV
Publication statusPublished - 1 Jan 2017
Event24th International Congress on Sound and Vibration, ICSV 2017 - London, United Kingdom
Duration: 23 Jul 201727 Jul 2017

Conference

Conference24th International Congress on Sound and Vibration, ICSV 2017
CountryUnited Kingdom
CityLondon
Period23/07/1727/07/17

Keywords

  • Finite element methods
  • Helmholtz resonator
  • Multiple arrays
  • Noise control

ASJC Scopus subject areas

  • Acoustics and Ultrasonics

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