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

Hao, Y; Kang, J; (2014) Influence of mesoscale urban morphology on the spatial noise attenuation of flyover aircrafts. Applied Acoustics , 84 pp. 73-82. 10.1016/j.apacoust.2013.12.001. Green open access

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Abstract

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 façades. 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 façades, 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 and1600 Hz in open areas. Urban morphological parameters influence the noise attenuation more in open areas than that on façades. Spatial noise attenuation of flyover aircrafts is mainly correlated to Building Frontal Area Index and Horizontal Distance of First-row Building to Flight Path.

Type: Article
Title: Influence of mesoscale urban morphology on the spatial noise attenuation of flyover aircrafts
Open access status: An open access version is available from UCL Discovery
DOI: 10.1016/j.apacoust.2013.12.001
Publisher version: https://doi.org/10.1016/j.apacoust.2013.12.001
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.
Keywords: Aircraft noise, Urban morphology, Noise attenuation, Low-density area, Flight altitude
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/10058528
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