A Study on Multimodal Behaviour of Plate Absorbers

Research output: Contribution to journalConference articleContributedpeer-review

Abstract

Membrane absorbers, which are commonly used types of resonance absorbers, convert sound energy into thermal energy by exploiting vibrations that occur on oscillating panels. Those types of absorbers are generally tuned to be efficient in a very narrow frequency range. However, if plates are used as the front panel, it is possible to broaden the effective absorbing frequency bandwidth by exciting multiple modes. This study is devoted to investigating the multimodal behaviour of plate absorbers with closed back volumes in low-frequency range. In the numerical part of the study, the box-shaped plate absorbers are modelled using a combined BEM/FEM approach. The results are validated with measurements conducted in an anechoic chamber. In addition, the sound absorption characteristics of the plate absorbers are obtained from an experimental study conducted in a reverberation chamber. The obtained results reveal that the plate absorbers can be effective in wider frequency ranges.

Details

Original languageEnglish
Pages (from-to)4300-4307
Number of pages8
JournalINTER-NOISE and NOISE-CON Congress and Conference Proceedings
Publication statusPublished - 2022
Peer-reviewedYes

Conference

Title51st International Congress and Exposition on Noise Control Engineering, Internoise 2022
Duration21 - 24 August 2022
CityGlasgow
CountryUnited Kingdom

External IDs

ORCID /0000-0001-7244-3503/work/142240996
ORCID /0000-0002-0803-8818/work/142257152
Scopus 85147443688

Keywords

ASJC Scopus subject areas