N2 - The use of periodic structures as noise abatement devices has already been the object of considerable research seeking to understand its efficiency and see to what extent they can provide a functional solu- tion in mitigating noise from different sources. The specific case of sonic crystals consisting of different materials has received special attention in studying the influence of different variables on its acoustic performance. The present work seeks to contribute to a better understanding of the behavior of these structures by implementing an approach based on the numerical method of fundamental solutions (MFS) to model the acoustic behavior of two-dimensional sonic crystals. The MFS formulation proposed here is used to evaluate the performance of crystals composed of circular elements, studying the effect of varying dimen- sions and spacing of the crystal elements as well as their acoustic absorption in the sound attenuation provided by the global structure, in what concerns typical traffic noise sources, and establishing some broad indications for the use of those structures. L1 - http://journals.pan.pl/Content/101555/PDF/08_paper.pdf L2 - http://journals.pan.pl/Content/101555 PY - 2013 IS - No 4 EP - 516 DO - 10.2478/aoa-2013-0060 KW - traffic noise KW - sonic crystals KW - numerical methods A1 - Martins, Mário A1 - Godinho, Luís A1 - Picado-Santos, Luís PB - Polish Academy of Sciences, Institute of Fundamental Technological Research, Committee on Acoustics VL - vol. 38 DA - 2013 T1 - Numerical Evaluation of Sound Attenuation Provided by Periodic Structures SP - 503 UR - http://journals.pan.pl/dlibra/publication/edition/101555 T2 - Archives of Acoustics