PREDICTION OF INSERTION LOSS OF THIN ACOUSTIC BARRIERS USING THE METHOD OF FUNDAMENTAL SOLUTIONS

Resumo

In this paper, the Method of Fundamental Solutions (MFS) is applied to predict the
insertion loss of thin acoustic barriers on a rigid ground in the vicinity of a tall building. The MFS
formulation makes use of suitable Green’s functions defined by the image-source technique, allowing
decreasing the number of discretized surfaces and consequently reducing the computational cost of
the numerical model. Both the ground and the building are modeled as infinite rigid plane surfaces.
To validate the implementation of the proposed formulation, the MFS results are compared with those
provided by the Dual-BEM formulation. Numerical simulations are carried out in order to illustrate
the acoustic performance of thin barriers of different shapes for typical cases of traffic noise.