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Influence of mesoscale urban morphology on the spatial noise attenuation of flyover aircrafts

机译：中尺度城市形态对立交飞机空间噪声衰减的影响

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摘要

The influence of urban morphology of low-density built-up areas on spatial noise level attenuation of flyover aircrafts is investigated at a mesoscale. Six urban morphological parameters, including Building Plan Area Fraction, Complete Aspect Ratio, Building Surface Area to Plan Area Ratio, Building Frontal Area Index, Height-to-Width Ratio, and Horizontal Distance of First-row Building to Flight Path, have been selected and developed. Effects of flight altitude and horizontal flight path distance to site, on spatial aircraft noise attenuation, are examined, considering open areas and facades. Twenty sampled sites, each of 250 m ~* 250 m, are considered. The results show that within 1000 m horizontal distance of flight path to a site, urban morphology plays an important role in open areas, especially for the buildings with high sound absorption facades, where the variance of average noise level attenuation among different sites is about 4.6 dB at 3150 Hz. The effect of flight altitude of 200-400 ft on average noise level attenuation is not significant, within about 2 dB at both 630 Hz and 1600 Hz in open areas. Urban morphological parameters influence the noise attenuation more in open areas than that on facades. Spatial noise attenuation of flyover aircrafts is mainly correlated to Building Frontal Area Index and Horizontal Distance of First-row Building to Flight Path.
机译：在中尺度上研究了低密度建成区的城市形态对立交飞机空间噪声级衰减的影响。选择了六个城市形态参数，包括建筑平面图面积比例，总纵横比，建筑表面积与平面图面积比，建筑正面面积指数，高宽比以及第一行建筑到飞行路径的水平距离。并且发达。考虑到开放区域和立面，研究了飞行高度和水平飞行路径到站点的距离对空间飞机噪声衰减的影响。考虑了20个采样点，每个采样点为250 m〜* 250 m。结果表明，在距站点的飞行路径水平距离内1000 m，城市形态在空旷地区起着重要作用，尤其是对于具有高吸音立面的建筑物而言，不同站点之间平均噪声水平衰减的差异约为4.6。 3150 Hz时的dB。 200-400英尺的飞行高度对平均噪声水平衰减的影响并不显着，在空旷地区的630 Hz和1600 Hz处，大约在2 dB之内。城市形态参数对开放区域的噪声衰减的影响比对立面的影响更大。高架飞机的空间噪声衰减主要与建筑物正面面积指数和第一排建筑物到飞行路径的水平距离有关。

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  • 来源
    《Applied Acoustics》 |2014年第10期|73-82|共10页
  • 作者

    Yiying Hao; Jian Kang;

  • 作者单位

    School of Architecture, University of Sheffield, Western Bank, Sheffield S10 2TN, United Kingdom,INCAS~3, Assen, Dr. Nassaulaan 9, Assen 9401 HJ, The Netherlands;

    School of Architecture, University of Sheffield, Western Bank, Sheffield S10 2TN, United Kingdom;

  • 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

    Aircraft noise; Urban morphology; Noise attenuation; Low-density area; Flight altitude;

    机译：飞机噪音;城市形态噪音衰减;低密度区域飞行高度;

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