Numerical analysis method for high-accuracy prediction of outdoor sound propagation under the influence of meteorological conditions

Shinji Hiejima, Yasuhiko Mukai, Tadashi Watanabe

Research output: Contribution to journalArticle

Abstract

A finite difference analysis method is developed to simulate outdoor sound propagation under the influence of inhomogeneous or unsteady meteorological conditions by applying the separable solution of aeroacoustics to the outdoor sound. It is verified that the perfectly reflecting boundary on ground surfaces and the nonreflective boundary to realize the sound transmission from finite domain to infinite domain virtually perform properly in the numerical analysis. Then the numerical analysis precisely simulated the advective effect of wind on sound propagation and the change of sound wavelength due to the difference of air temperature. Furthermore, a shadow zone of acoustic waves was identified from the computation of sound propagation with the nonuniform vertical distribution of wind flow.

Original languageEnglish
Pages (from-to)708-717
Number of pages10
JournalDoboku Gakkai Ronbunshuu A
Volume65
Issue number3
DOIs
Publication statusPublished - Dec 1 2009
Externally publishedYes

Keywords

  • Air temperature
  • High accuracy prediction
  • Outdoor sound
  • Semi-infinite domain
  • Wind

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Building and Construction
  • Mechanics of Materials
  • Mechanical Engineering

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