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J Acoust Soc Am. 2014 Jun;135(6):EL324-30. doi: 10.1121/1.4879672.

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

Author information

  • 1Faculty of Engineering, Niigata University, 8050 Ikarashi-Ninocho, Nishi-ku, Niigata 950-2181, Japan oshima@eng.niigata-u.ac.jp.
  • 2Institute of Technology, Shimizu Corporation, 3-4-17 Etchujima, Koto-ku, Tokyo 135-8530, Japan ishiduka@shimz.co.jp.
  • 3Faculty of Engineering, Niigata University, 8050 Ikarashi-Ninocho, Nishi-ku, Niigata 950-2181, Japan kamijo23@ntt-f.co.jp.

Abstract

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.

PMID:
24907841
[PubMed - in process]
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