Frontiers of Architectural Research >

2021 , Vol. 10 >Issue 2: 410 - 419

DOI: https://doi.org/10.1016/j.foar.2020.12.003

RESEARCH ARTICLE

Noise levels inside the coaches of Greater Cairo tunnel metro, line 3 tunnel

  • Soha Eldakdoky , 1 ,
  • Ahmed Elkhateeb 2
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  • 1. Department of Architecture, Faculty of Engineering, Helwan University, Cairo, Egypt
  • 2. Department of Architecture, Faculty of Engineering, Ain Shams University, Cairo, Egypt

Received date: 01 Aug 2020

Accepted date: 08 Dec 2020

Published date: 15 Jun 2021

Copyright

2020 2020 Higher Education Press Limited Company. Publishing services by Elsevier B.V. on behalf of KeAi Communications Co. Ltd. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).
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Abstract

This paper investigates the noise inside a metro coach running through the most recent tunnel of Cairo. The study focuses on the effects of alignment profiles on the A-weighted noise level. Although the latest line has not been studied yet, noise levels inside the old lines attracted the attention of researchers due to their importance as the first mass transit system in Africa. Given that windows are usually kept open, measurements were con-ducted inside the empty cabin at the end of the train with open windows according to ISO 3381:2005. Results showed that noise emissions inside the running coaches are high and do not follow either international or general national legislation, which presents health hazards for drivers and commuters. Speech intelligibility is required for train radio units and driver con-soles for voice communications, which provides a safe working environment for the train crew. The present study reveals that tight curves mainly contribute to high noise. The noise levels are further raised by the reflective surface of the tunnel with a circular cross-section and the unballasted track. Moreover, the noise level is affected by the location of the coach and window conditions (open/close) to some extent.

Key words： Interior noise; Line 3 tunnel; Equivalent noise; Slope gradient; Noise exposure; Unballasted slab track

Cite this article

Soha Eldakdoky , Ahmed Elkhateeb . Noise levels inside the coaches of Greater Cairo tunnel metro, line 3 tunnel[J]. Frontiers of Architectural Research, 2021 , 10(2) : 410 -419 . DOI: 10.1016/j.foar.2020.12.003

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