Issue |
Acta Acust.
Volume 5, 2021
|
|
---|---|---|
Article Number | 28 | |
Number of page(s) | 10 | |
Section | Environmental Noise | |
DOI | https://doi.org/10.1051/aacus/2021021 | |
Published online | 20 July 2021 |
Scientific Article
Normal incidence sound insulation provided by Sonic Crystal Acoustic Screens made from rigid scatterers – assessment of different simulation methods
1
BECSA, Ciudad del Transporte II. C/Grecia, 31, 12006 Castellón de la Plana, Spain
2
Universitat Politècnica de València, Centro de Tecnologías Físicas, Acústica, Materiales y Astrofísica, División acústica. Camino de Vera s/n, 46022 Valencia, Spain
3
University of Coimbra, ISISE, Department of Civil Engineering, Rua Luis Reis Santos, 3030-788 Coimbra, Portugal
4
Universitat Politècnica de València, Instituto de Investigación para la Gestión Integrada de zonas Costeras, Paranimf 1, 46730 Grao de Gandia, Valencia, Spain
* Corresponding author: fredondo@fis.upv.es
Received:
5
October
2020
Accepted:
31
May
2021
Sonic crystal acoustic screens have been in progressive research and development in the last two decades as a technical solution for mitigating traffic noise. Their behaviour is quite different from that observed in classical barriers, with the latter being based on physically blocking the direct sound propagation path (only allowing diffracted noise to reach sensible receivers), and sonic crystals providing attenuation efficiency based on the creation of “band-gaps” at specific frequency ranges, due to the Bragg’s interference phenomenon. The distinct physical mechanisms of these two types of noise barriers complicates the use of classical simplified or even numerical models developed for traditional barriers to simulate and predict the attenuation performance of a sonic crystal, and alternative methods become thus required. In the acoustics scientific literature, several authors have proposed estimation and simulation methods based on different numerical tools to predict the sound insulation provided by these new noise abatement solutions. This paper presents a comparative evaluation of some of these methods, with emphasis on the assessment of their accuracy versus memory usage in order to determine which one is the most suitable for optimization methodologies in the design of new devices with improved acoustic performance.
Key words: Sonic crystals / Acoustic screens / Numerical methods
© M.P. Peiró-Torres et al., Published by EDP Sciences, 2021
This is an Open Access article distributed under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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