Broadband noise mitigation using coupled Helmholtz resonators: A numerical study

Mariia Krasikova, Anton Melnikov, Sergey Krasikov, Yuri Baloshin, Alexey Slobozhanyuk, Steffen Marburg, David Powell, Andrey Bogdanov

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

In this work, we investigate a two-dimensional periodic structure in the frequency range from 20 Hz to 5500 Hz designed for broadband noise insulation. The considered unit cell consists of a pair of polymer pipes with slits carved along the axes, representing two coupled Helmholtz resonators. It is demonstrated that tuning of geometric parameters of the resonators results in opening of large band-gaps, such that the total width of complete band-gaps may exceed 50 % of the spectrum and the total width of ΓX band-gaps may be approximately 80 %. Eigenmodes of the system are analyzed in terms of their symmetry and interaction with each other. Results for the infinite two-dimensional structure are compared with numerically determined transmission coefficient of a semi-infinite structure with the same unit cell. The number of unit cells of the semi-infinite structure is chosen to be sufficient for demonstration of stop-bands corresponding to ΓX band-gaps of the infinite structure. Furthermore, we analyze how the transmission coefficient is linked to the pressure field distribution inside the resonators. Owing to the simplicity of the geometry, the obtained results may become a basis for development of budget-friendly passive systems for broadband noise insulation within the audible range of frequencies.

Original languageEnglish
Title of host publicationProceedings of INTER-NOISE 2021 - 2021 International Congress and Exposition of Noise Control Engineering
EditorsTyler Dare, Stuart Bolton, Patricia Davies, Yutong Xue, Gordon Ebbitt
PublisherThe Institute of Noise Control Engineering of the USA, Inc.
ISBN (Electronic)9781732598652
DOIs
StatePublished - 2021
Event50th International Congress and Exposition of Noise Control Engineering, INTER-NOISE 2021 - Washington, United States
Duration: 1 Aug 20215 Aug 2021

Publication series

NameProceedings of INTER-NOISE 2021 - 2021 International Congress and Exposition of Noise Control Engineering

Conference

Conference50th International Congress and Exposition of Noise Control Engineering, INTER-NOISE 2021
Country/TerritoryUnited States
CityWashington
Period1/08/215/08/21

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