Journal
APPLIED ACOUSTICS
Volume 65, Issue 2, Pages 125-141Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.apacoust.2003.08.006
Keywords
noise control; road traffic noise; barrier; boundary element method
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The performances of barriers having different shapes and surface conditions were tested using the boundary element method in a well-controlled environment. The heights and widths of the barriers were standardized and the insertion losses for six receiver positions were averaged and compared. Figures displaying the results allow for straightforward barrier performance estimation. It was shown that absorbing and soft edges significantly improve the efficiency of the barrier, but configuration modifications provide only a slight improvement. The soft T-shaped barrier produces the highest performance. A 3 in high T-shaped barrier provides the same performance as a 10 m high plain barrier. The spectral efficiency was also investigated. The insertion loss spectra for the absorbing and the soft barriers exhibit a similar shape, but the rigid barrier differs from these two. (C) 2003 Elsevier Ltd. All rights reserved.
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