title: Three-dimensional urban acoustic simulations and scale-model measurements over real-life topography.
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.
authors.affiliation: Faculty of Engineering, Niigata University, 8050 Ikarashi-Ninocho, Nishi-ku, Niigata 950-2181, Japan oshima@eng.niigata-u.ac.jp.
authors.forename: Takuya
authors.initials: T
authors.lastname: Oshima
authors.affiliation: Institute of Technology, Shimizu Corporation, 3-4-17 Etchujima, Koto-ku, Tokyo 135-8530, Japan ishiduka@shimz.co.jp.
authors.forename: Takashi
authors.initials: T
authors.lastname: Ishizuka
authors.affiliation: Faculty of Engineering, Niigata University, 8050 Ikarashi-Ninocho, Nishi-ku, Niigata 950-2181, Japan kamijo23@ntt-f.co.jp.
authors.forename: Takahide
authors.initials: T
authors.lastname: Kamijo