Abstrakt
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.
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