3D Acoustic Metamaterial Using Interconnected Helmholtz Resonators

Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review

53 Downloads (Orbit)

Abstract

Helmholtz resonators distributed in an array are one way to create an acoustic metamaterial for air-borne sound, ideally achieving perfect absorption at the resonance frequency. While a large number of variations have been reported in literature, the individual resonators are typically stand-alone elements. In this contribution we investigate the placement of interconnected Helmholtz resonators in a three-dimensional lattice, where multiple necks connect adjacent cavities. We have studied such lattices using finite element analysis, fabricated selected design with 3D-printing, and experimentally validated results in impedance tube measurements. This work is based on our prior research in 3D metamaterials for vibrations and elastic waves, which has demonstrated very strong damping inside ultra-wide band gaps. Likewise, we aim to achieve wide frequency ranges of strong sound absorption and high transmission loss greater than equivalent 2D arrangements.
Original languageEnglish
Title of host publicationProceedings of DAS|DAGA 2025
PublisherDeutsche Gesellschaft für Akustik e.V.
Publication date2025
Pages1017-20
ISBN (Print)978-3-939296-23-2
DOIs
Publication statusPublished - 2025
EventDAS|DAGA 2025, 51st Annual Meeting on Acoustics - Bella Center, København, Denmark
Duration: 17 Mar 202520 Mar 2025
https://www.das-daga2025.eu

Conference

ConferenceDAS|DAGA 2025, 51st Annual Meeting on Acoustics
LocationBella Center
Country/TerritoryDenmark
CityKøbenhavn
Period17/03/202520/03/2025
Internet address

Fingerprint

Dive into the research topics of '3D Acoustic Metamaterial Using Interconnected Helmholtz Resonators'. Together they form a unique fingerprint.

Cite this