Multi-layer perforated panel absorbers with oblique perforations
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http://hdl.handle.net/10045/108854
Títol: | Multi-layer perforated panel absorbers with oblique perforations |
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Autors: | Carbajo, Jesús | Ghaffari Mosanenzadeh, Shahrzad | Kim, Seok | Fang, Nicholas X. |
Grups d'investigació o GITE: | Acústica Aplicada |
Centre, Departament o Servei: | Universidad de Alicante. Departamento de Física, Ingeniería de Sistemas y Teoría de la Señal |
Paraules clau: | Multi-layer system | Sound absorption | Fluid-equivalent model |
Àrees de coneixement: | Física Aplicada |
Data de publicació: | 1-de desembre-2020 |
Editor: | Elsevier |
Citació bibliogràfica: | Applied Acoustics. 2020, 169: 107496. https://doi.org/10.1016/j.apacoust.2020.107496 |
Resum: | Many different solutions exist to improve the low-frequency sound absorption performance of acoustic resonators, extending or coiling up space into the resonator being some of the most widespread. In this context, modern additive manufacturing processes pose a new scenario in which these devices can be engineered to yield outstanding acoustic properties. In a recent work by the authors, a solution consisting of a perforated panel with oblique perforations was analyzed, results showing an enhanced sound absorption performance when compared to traditional perforated panel absorbers. This technical note aims to show the potential of these panels when used in multi-layer arrangements both to widen their effective sound absorption bandwidth and to improve their low-frequency performance. A simplified approach that relies on the fluid-equivalent theory was used together with the Transfer Matrix Method (TMM) to analyse different configurations, prediction results showing a good agreement when compared to experiments in an impedance tube over additive manufactured samples. Unlike other perforated-based solutions, the proposed system avoids addressing the cavity design while showing improved sound absorption features. |
Patrocinadors: | This work was supported by the COST (European Cooperation in Science and Technology) Action CA15125 - DENORMS: ‘‘Designs for Noise Reducing Materials and Structures”. |
URI: | http://hdl.handle.net/10045/108854 |
ISSN: | 0003-682X (Print) | 1872-910X (Online) |
DOI: | 10.1016/j.apacoust.2020.107496 |
Idioma: | eng |
Tipus: | info:eu-repo/semantics/article |
Drets: | © 2020 Elsevier Ltd. |
Revisió científica: | si |
Versió de l'editor: | https://doi.org/10.1016/j.apacoust.2020.107496 |
Apareix a la col·lecció: | INV - Acústica Aplicada - Artículos de Revistas |
Arxius per aquest ítem:
Arxiu | Descripció | Tamany | Format | |
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Carbajo_etal_2020_ApplAcoustics_final.pdf | Versión final (acceso restringido) | 1,16 MB | Adobe PDF | Obrir Sol·licitar una còpia |
Carbajo_etal_2020_ApplAcoustics_accepted.pdf | Accepted Manuscript (acceso abierto) | 1,17 MB | Adobe PDF | Obrir Vista prèvia |
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