Abstract
This study attempts to present a method for traffic noise attenuation calculation around buildings, which uses beam tracing method based on tetrahedron subdivision. Firstly, spatial structure which includes building and road cells were gained by tetrahedron subdivision. Then the generated tetrahedron split structures are used in a fast acoustic beam tracking and path generation. After that, the road noise attenuation model in the 3D buildings was gained with a totally consideration of both noise emission model and noise propagation model. Ultimately, an example was given and the method was proved to be accurate and feasible.
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