Takashi IWANARI
Analysis of 3-Dimensional Cellular Automata approach Noise PropagationĦĦin consideration of the Complex Reflectance
Yasuyuki MIYAKI
A present 3-dimensional Cellular Automata (CA) model can consider only a complete reflection. Therefore, a present three-dimensional CA model may underestimate an acoustic absorption effect in reflection including phase difference and acoustic absorption of noise propagation analysis.
For the problem of the various noise propagation analysis that can not be represented in a present three-dimensional CA model, to approximate the model available on the more practical, construct a new three-dimensional CA model in consideration of a complex reflectance.
As a result, theoretical and value calculated from the CA of sound pressure level of the sound absorption reflectance are similar results obtained by a newly boundary condition of reflectance. In addition, theoretical and value calculated from the CA of sound pressure level of the complex reflectance are similar results when phase difference and reflectance are small. Also, theoretical and value calculated from the CA of sound pressure level of the sound absorption reflectance are some errors when phase difference and reflectance are big. But, those sound levels are generally similar results obtained.
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