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Evaluation of road traffic noise abatement by vegetation treatment in a 1:10 urban scale model

Title
Evaluation of road traffic noise abatement by vegetation treatment in a 1:10 urban scale model
Author
전진용
Keywords
SOUND-PROPAGATION; GREEN ROOFS; REFLECTING BOUNDARIES; BUILDING FACADES; STREET CANYONS; CITY CANYONS; REDUCTION; ABSORPTION; AREAS; TREES
Issue Date
2015-12
Publisher
ACOUSTICAL SOC AMER AMER INST PHYSICS
Citation
JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA, v. 138, NO 6, Page. 3884-3895
Abstract
A 1: 10 scale of a street canyon and courtyard was constructed to evaluate sound propagation when various vegetation treatments including trees, shrubs, vegetated facades, and green roofs were installed in the urban environment. Noise reductions in the street canyon and courtyard were measured for both single and combined vegetation treatments. Vegetated facades mitigated the overall noise level up to 1.6 dBA in the street canyon, and greening facades were effective to reduce low frequency noise levels below 1 kHz. Trees increased the noise level at high frequency bands to some extent in the street canyon, while the noise level over 1 kHz decreased in the courtyard after installing the street trees. This is because tree crowns diffused and reflected high frequency sounds into the street canyon. Green roofs offered significant noise abatement over 1 kHz in the courtyard, while the vegetated facade was effective to reduce noise levels at low frequencies. In terms of the integrated effects of vegetation treatments, a combined vegetation treatment was less effective than the sum of single treatments in the street canyon. The maximum noise reduction observed for all combinations of vegetation treatments provided 3.4 dBA of insertion loss in the courtyard. (C) 2015 Acoustical Society of America.
URI
http://asa.scitation.org/doi/10.1121/1.4937769http://hdl.handle.net/20.500.11754/29249
ISSN
0001-4966; 1520-8524
DOI
10.1121/1.4937769
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > ARCHITECTURAL ENGINEERING(건축공학부) > Articles
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