Scale-model method for measuring noise reduction in residential buildings by vegetation

Title
Scale-model method for measuring noise reduction in residential buildings by vegetation
Author
전진용
Keywords
Scale model; Absorption coefficient; Ground impedance; Vegetation; Noise reduction
Issue Date
2015-03
Publisher
PERGAMON-ELSEVIER SCIENCE LTD
Citation
BUILDING AND ENVIRONMENT, v. 86, Page. 81-88
Abstract
This paper proposes an evaluation procedure using a scale model to assess the noise reduction effects of vegetated facades for sustainable urban building designs. The absorption coefficients of the scale-model materials were measured to fit the absorption characteristics of real vegetation. The ground impedance of asphalt was also measured to deduce the acoustical properties of ground surfaces and to select the ground material. To assess the reduction of road traffic noise, a line source for a 1:10 scale model was modelled using ribbon tweeters that generated high frequencies ranging from 1 kHz to 40 kHz. Accordingly, the effects of adding vegetated facades were evaluated in the scale model of a street canyon. The noise reduction due to the vegetated facades was less than 2 dB at pedestrian level in a two-lane street canyon. The scale model results were compared with geometric computer simulation results, and both evaluation methods showed similar results. The suggested modelling method can be useful for evaluating the noise reduction in street canyons by vegetation considering realistic features such as the absorption, scattering, and diffraction associated with the materials and sound sources according to the shape of the vegetation. (C) 2014 Elsevier Ltd. All rights reserved.
URI
http://www.sciencedirect.com/science/article/pii/S0360132314004375http://hdl.handle.net/20.500.11754/22527
ISSN
0360-1323; 1873-684X
DOI
10.1016/j.buildenv.2014.12.020
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > ARCHITECTURAL ENGINEERING(건축공학부) > Articles
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