Three-dimensional urban acoustic simulations and scale-model measurements over real-life topography | Zendy

拓也 大嶋 | Zendy; Takashi Ishizuka | Zendy; Takahide Kamijo | Zendy

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Three-dimensional urban acoustic simulations and scale-model measurements over real-life topography

Author(s) -

拓也大嶋,

Takashi Ishizuka,

Takahide Kamijo

Publication year - 2014

Publication title -

the journal of the acoustical society of america

Language(s) - English

Resource type - Journals

eISSN - 1520-8524

pISSN - 0001-4966

DOI - 10.1121/1.4879672

Subject(s) - acoustics , scale (ratio) , terrain , octave (electronics) , scale model , sound pressure , sound propagation , root mean square , geology , physics , geography , cartography , quantum mechanics , aerospace engineering , engineering

Comparisons of finite-difference time-domain sound propagation simulations over real-life urban topography with scale-model experimental measurements are performed. A 1:100 scale model for the measurements and full-scale input geometry for the simulations are created by using digital geographic datasets. The sound pressure levels obtained by the measurements and simulations resulted in approximately 2 dB of root mean square error in the 125 and 250 Hz octave bands, and 4 dB in 500 Hz. Visualizations of a low-frequency sound propagation case by the measurement and simulation clearly show the wave phenomena caused by buildings and natural terrain.

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