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Acoustic performance of gabions noise barriers: Numerical and experimental approaches

机译:石笼网隔音屏障的声学性能:数值和实验方法

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摘要

This research work aims at evaluating the acoustic performance of conventional and low height gabions noise barriers. On one hand, in situ as well as scale model measurements at a scale of 1:10 have been carried out to assess the intrinsic acoustic properties of a 3 m high gabions barrier. Single number ratings of transmission and reflection indices reached 20 dB and 5 dB, respectively. On the other hand, numerical simulations using a 2D boundary element method (BEM) and scale model measurements are carried out to study the effectiveness of low height gabions noise barriers when they are inserted in dense urban areas. The agreement between numerical and scale model measurements results is satisfactory. The effectiveness of low height gabions noise barriers is significant for receivers of limited height and the insertion loss values can reach 8 dB(A) behind the barrier. This confirms that gabions noise barriers are possible candidates as useful devices for environmental noise reduction.
机译:这项研究工作旨在评估常规和低高度石笼式隔音屏障的声学性能。一方面,已经进行了比例为1:10的现场和比例模型测量,以评估3 m高的石笼网屏障的固有声学特性。透射和反射指数的单个数字等级分别达到20 dB和5 dB。另一方面,进行了使用2D边界元方法(BEM)和比例模型测量的数值模拟,以研究将低高度石笼网隔音屏障插入密集城市地区时的效果。数值和比例模型测量结果之间的一致性是令人满意的。低高度的石笼网隔音屏障对于有限高度的接收器而言非常重要,插入损耗值可以达到屏障后面的8 dB(A)。这证实了石笼网的隔音屏障可能是减少环境噪声的有用设备。

著录项

  • 来源
    《Applied Acoustics》 |2013年第1期|189-197|共9页
  • 作者单位

    Centre Scientifique et Technique du Batiment, 24 rue Joseph Fourier, 38400 Saint Martin d'Heres, France;

    Centre Scientifique et Technique du Batiment, 24 rue Joseph Fourier, 38400 Saint Martin d'Heres, France;

    Centre Scientifique et Technique du Batiment, 24 rue Joseph Fourier, 38400 Saint Martin d'Heres, France;

    LMFA, UMR CNRS 5509, Ecole centrale de Lyon, Universite de Lyon, 69134 Ecully Cedex, France;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    gabions noise barriers; scale model measurements; in situ measurments; BEM; insertion loss;

    机译:石笼网隔音屏障;比例模型测量;原位测量;BEM;插入损耗;

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