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Sound field characteristics of underground railway stations - Effect of interior materials and noise source positions

机译：地下火车站的声场特性-室内材料和噪声源位置的影响

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摘要

In the case of most underground railway stations, no acoustical solutions are used to reduce train noise. Because the reflecting features of train noise in an underground station are not known, appropriate methods for controlling these features have yet to be established. The aim of this study was to clarify the sound field characteristics of underground stations by putting a sound source and receiver on the railway track and platform, respectively. The impulse responses for two vacant underground stations were measured to clarify the effects of the interior materials of the station (Comparison I), and the sound source was put in each station and tunnel to clarify the effect of the noise source positions (Comparison II). Results showed that the sound fields were similar between the stations whose lateral walls were covered with either metallic or fire-resistant wooden panels (Comparison 1), and that the sound field for the sound sources near or in the tunnel presented a higher strength (G) by 5.1 dB and longer reverberation time (EDT) by 0.7 s compared to the sound source in the station (Comparison II). The sound sources in the tunnel presented strong and long reverberations at around 500 Hz due to the convergence effect of the tunnel. Therefore, this study proposes a platform screen with doors to limit noise transmission into the platform.
机译：对于大多数地下火车站，没有使用声学解决方案来减少火车的噪音。由于地铁站中火车噪声的反射特征未知，因此尚未建立用于控制这些特征的适当方法。这项研究的目的是通过将声源和接收器分别放在铁路轨道和月台上来阐明地下车站的声场特性。测量了两个空置地下站的脉冲响应，以弄清该站的内部材料的影响（比较I），并将声源放置在每个站和隧道中，以弄清噪声源位置的影响（比较II） 。结果表明，在其侧壁覆盖有金属或耐火木板的车站之间的声场相似（比较1），隧道附近或隧道内声源的声场强度更高（G ），相比于电台中的声源（比较II），混响时间延长了5.1 dB，混响时间（EDT）延长了0.7 s。由于隧道的会聚效应，隧道中的声源在500 Hz左右呈现强而长的混响。因此，本研究提出了一种带门的平台屏风，以限制噪声进入平台。

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  • 来源
    《Applied Acoustics》 |2012年第11期|p.1150-1158|共9页
  • 作者

    Ryota Shimokura; Yoshiharu Soeta;

  • 作者单位

    Health Research Institute, National Institute of Advanced Industrial Science and Technology, 1-8-31 Midorigaoka, Ikeda, Osaka 563-8577, Japan;

    Health Research Institute, National Institute of Advanced Industrial Science and Technology, 1-8-31 Midorigaoka, Ikeda, Osaka 563-8577, Japan;

  • 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

    underground station; tunnel; sound field; strength; reverberation time;

    机译：地铁站;隧道;声场强度;混响时间;

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