Abstract
A simple hard screen on an absorbing ground is investigated
experimentally and theoretically under upwind conditions. The
experimental data are the result of model experiments in a 1:25
scale model within a wind tunnel. The sound propagation is
measured using a triggered spark source and averaging on power
basis 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. This solution is
used for propagation from source to screen and from screen
onwards. The screen is taken into account by means of diffraction
theory. Comparison of theoretical and experimental data shows a
good agreement for upwind propagation. For downwind propagation
the sound is carried over the screen in a manner which the present
approach is unable to predict.
Original language | English |
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Journal | Acustica |
Volume | 82 |
Issue number | Suppl. 1 |
Pages (from-to) | 127-127 |
ISSN | 0001-7884 |
Publication status | Published - 1996 |
Event | Forum Acusticum 1996 - Antwerp, Belgium Duration: 1 Apr 1996 → 4 Apr 1996 |
Conference
Conference | Forum Acusticum 1996 |
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Country/Territory | Belgium |
City | Antwerp |
Period | 01/04/1996 → 04/04/1996 |