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Experimental investigation of the sound absorption performance of compartmented Helmholtz resonators

Tang, S. K.; Ng, C. H.; Lam, E. Y.L.

Authors

C. H. Ng

E. Y.L. Lam



Abstract

An experiment was derived in the present study to investigate the effects of coupling up two Helmholtz resonators on their overall sound absorption performance. The effect of compartmenting the cavity of a resonator on its sound absorption property was also discussed. Such cavity compartmentation in fact creates a coupled resonator with a front and a rear resonator. The results show that the coupling in many cases can improve the sound absorption capacity and widen the working bandwidth of the resonators provided that the uncoupled resonance frequency of the front resonator is larger than or equal to that of the rear resonator. Results also suggest that the best compartmentation is that with these uncoupled resonance frequencies very close to each other. It is also found that the undamped plane wave approach is sufficient to predict the resonance frequencies of the coupled resonators within engineering tolerance. © 2012 Elsevier Ltd. All rights reserved.

Citation

Tang, S. K., Ng, C. H., & Lam, E. Y. (2012). Experimental investigation of the sound absorption performance of compartmented Helmholtz resonators. Applied acoustics. Acoustique appliqué. Angewandte Akustik, 73(9), 969-976. https://doi.org/10.1016/j.apacoust.2012.03.016

Journal Article Type Article
Acceptance Date Mar 30, 2012
Online Publication Date Apr 26, 2012
Publication Date Sep 1, 2012
Deposit Date Jul 11, 2022
Journal Applied Acoustics
Print ISSN 0003-682X
Publisher Elsevier
Peer Reviewed Peer Reviewed
Volume 73
Issue 9
Pages 969-976
DOI https://doi.org/10.1016/j.apacoust.2012.03.016
Keywords Resonators; Sound absorption
Public URL https://hull-repository.worktribe.com/output/4015967