Decimation of meshes for BEM calculations

Three dimensional surface meshes are used in several computer graphics and calculation applications. One of the fields we can find these models in is Acoustics. In regards to the acoustic field calculations, often the models we get from CAD programs or 3D laser scanners are excesively detailed for low frequency calculations. A decimation process of triangular meshes is presented in this paper. Decimation is the concept of removing a large number of polygons from the original mesh, maintaining certain quiality in the resulted new mesh. Many solutions and different approaches have been tested. The acoustics implications of this process will be discussed.