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Metaheuristic optimisation of sound absorption performance of multilayered porous materials

Ramamoorthy, Vivek T.; Özcan, Ender; Parkes, Andrew J.; Luc, Jaouen; Bécot, François-Xavier

Authors

Vivek T. Ramamoorthy vivek.ramamoorthy1@nottingham.ac.uk

Ender Özcan ender.ozcan@nottingham.ac.uk

Andrew J. Parkes andrew.parkes@nottingham.ac.uk

Jaouen Luc luc.jaouen@matelys.com

François-Xavier Bécot



Abstract

The optimization of multilayered-sound-packaging is a challenging task which involves searching the best/op-timal settings for a number of acoustic parameters. The search space size becomes too large to handle by brute force, as the number of those parameters increases. In this study, we apply metaheuristics to configure multi-layered porous materials for maximizing their overall sound absorption coefficient. The multi-layered system is composed of a stack of facing screens (i.e. a woven or non-woven textile, a perforated plate) and/or thicker porous material combinations, chosen from a database of common acoustic materials. Firstly, we consider a two layered system with a fibrous porous material layer modeled using Delany-Bazley-Miki (DBM) model and a facing screen modeled by Johnson-Champoux-Allard (JCA) model, and optimize different parameters for maximizing the sound absorption. Secondly, for multilayered systems with more than two layers, a genetic algorithm is presented to explore the thickness and acoustical parameters that maximize the sound absorption coefficients for a frequency range of interest.

Start Date Sep 9, 2019
Publication Date Sep 13, 2019
Pages 3213-3220
Series ISSN 2226-7808
Book Title Proceedings of the ICA 2019 and EAA Euroregio 23rd International Congress on Acoustics, integrating 4th EAA Euroregio 2019 9 - 13 September 2019, Aachen, Germany
ISBN 9783939296157
Institution Citation Ramamoorthy, V. T., Özcan, E., Parkes, A. J., Luc, J., & Bécot, F. (2019). Metaheuristic optimisation of sound absorption performance of multilayered porous materials. In Proceedings of the ICA 2019 and EAA Euroregio 23rd International Congress on Acoustics, integrating 4th EAA Euroregio 2019 9 - 13 September 2019, Aachen, Germany, 3213-3220
Keywords Metaheuristics; Multilayered porous materials; Genetic algorithms; Sound absorption
Publisher URL http://pub.dega-akustik.de/ICA2019/data/articles/001480.pdf
Related Public URLs http://www.ica2019.org/

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