Acoustic Ray tracing in urban environments

Sammanfattning: This is the report of the development of a program written in MATLAB to study the propagation of sound waves using Smit’s ray tracing algorithm. The final program is able to use the data from vectorized maps to build a three-dimensional landscape and calculate the reflections at each interception point when a ray emitted from the source hits the surface of an obstacle.Another goal is to make use of all the cores, physical and logical, a modern CPU has to offer. This is to make sure the calculations are made as fast as possible. In order to meet this criteria the MATLAB Parallel Computing Toolbox is used. This requires the program code to allow for parallel execution of the code. A routine for calculation of diffraction around the building edges is also implemented. This diffraction routine was customized to suit this particular ray tracing algorithm.