Sound propagation over screened ground under upwind conditions

Karsten Bo Rasmussen

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    Abstract

    A screen on an absorbing ground is investigated experimentally and theoretically under upwind conditions. The experimental data are the result of scale model experiments in a 1:25 scale model. The sound propagation is measured using a triggered spark source with signal spectrum averaging in the frequency domain. The meteorological data representing the wind conditions have been determined by means of hot-wire anemometry in positions on both sides of the screen as well as directly over the screen. The theoretical model used for comparison is a hybrid approach. The sound field without a barrier is determined by means of numerical integration of a Hankel transform solution for a stratified atmosphere [like a fast field program (FFP) but taking the near field into account]. This solution is used on both sides of the screen and is combined with a screen diffraction calculation. Results from the calculation model are able to explain the overall tendency in the experimental results.
    Original languageEnglish
    JournalAcoustical Society of America. Journal
    Volume100
    Issue number6
    Pages (from-to)3581-3586
    ISSN0001-4966
    DOIs
    Publication statusPublished - 1996

    Bibliographical note

    Copyright (1996) Acoustical Society of America. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the Acoustical Society of America.

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