engleski

The algorithm of beam division in beam tracing method for non-homogeous environments

The methods for the simulation of propagation of sound based on the principles of geometric acoustics have so far been used mostly in homogenous environments. These methods are based primarily on the reflection, and calculate propagation only in homogenous media. The author has previously published a proposed alternative method based on the beam-tracing method that can be used to calculate propagation of sound in non- homogenous environments. The proposed method calculates not only reflection, but also the refraction of the sound waves. Since environment in this method can be of complex shape and composition, it is represented by irregular triangle networks (TIN). This paper presents the algorithm of beam division, which is used when the beam representing sound wave encounters a discontinuum in the environment. The discontinuum generates results in a reflected and a refracted wave. Also because the discontinuums are represented by TIN, in some cases the division of beam into several smaller ones also happens. The process of beam division can be rather complex, and this paper presents the detailed algorithm for this process.

simulation; beam tracing

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