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Title: Normal incidence sound insulation provided by Sonic Crystal Acoustic Screens made from rigid scatterers – assessment of different simulation methods
Authors: Peiró-Torres, M. P.
Ferri, M.
Godinho, Luís M. 
Amado-Mendes, Paulo 
Jose Vea Folch, Francisco
Redondo, Javier
Keywords: Sonic crystals; Acoustic screens; Numerical methods
Issue Date: 2021
Publisher: European Acoustics Association, EAA
Project: Ministerio de Ciencia, Innovación y Universidades, Spain, under grant RTI2018-096904-B-I00 
POCI-01-0247-FEDER-033691 – HLS – Hybrid Log Shield, supported by FEDER funds, through Portugal-2020 (PT2020) Programme, within the scope of SII&DT System, and by POCI Programme 
pre-doctoral Grant by the “Ministerio de Ciencia, Innovación y Universidades. Agencia Estatal de Investigación” of Spain through reference no. DI-15-08100 
UIDB / 04029/2020 
Serial title, monograph or event: Acta Acustica
Volume: 5
Abstract: 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.
ISSN: 2681-4617
DOI: 10.1051/aacus/2021021
Rights: openAccess
Appears in Collections:FCTUC Eng.Civil - Artigos em Revistas Internacionais

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