UCL Discovery
UCL home » Library Services » Electronic resources » UCL Discovery

Effect of Height-To-Width Ratio on the Sound Propagation in Urban Streets

Lee, PJ; Kang, J; (2015) Effect of Height-To-Width Ratio on the Sound Propagation in Urban Streets. Acta Acustica United With Acustica , 101 (1) pp. 73-87. 10.3813/AAA.918806. Green open access

[img]
Preview
Text
Kang_2014_08_05_Street_canyon_second_preprint.pdf

Download (1MB) | Preview

Abstract

Street geometry is one of main issues on urban design which influence sound environment as well as urban climate in a street canyon. A parametric study was performed in order to investigate the influence of height-to-width ratio (H/W) on sound fields in urban streets in terms of sound pressure level (SPL), reverberation time (T30), and early decay time (EDT). A computer simulation technique based on a hybrid method combining ray tracing and image source modeling was adopted, and an omnidirectional sound source was used. Four typical idealized urban streets were modeled, with street widths of 6 m, 13 m, 20 m, and 27 m, respectively. The H/W ratio was then changed in seven steps with varying building heights while the widths of streets were fixed. Comparisons with experimental studies showed that the computer simulation models produce reliable results for SPL and T30. It was found that the variation of SPL was affected by the H/W ratio only for narrow urban streets, and the T30 and EDT increased with an increase in the H/W ratio for both narrow and wide streets. It was also observed that the T30 decreased with increasing scattering coefficients, and the EDT significantly increased as scattering coefficients increased for H/W of 3 and 6. A line source representing road traffic noise was found to produce different tendencies in SPL and EDT, showing that SPL and EDT were relatively constant along the length.

Type: Article
Title: Effect of Height-To-Width Ratio on the Sound Propagation in Urban Streets
Open access status: An open access version is available from UCL Discovery
DOI: 10.3813/AAA.918806
Publisher version: https://doi.org/10.3813/AAA.918806
Language: English
Additional information: This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions.
UCL classification: UCL
UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of the Built Environment
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of the Built Environment > Bartlett School Env, Energy and Resources
URI: https://discovery.ucl.ac.uk/id/eprint/10058525
Downloads since deposit
77Downloads
Download activity - last month
Download activity - last 12 months
Downloads by country - last 12 months

Archive Staff Only

View Item View Item