کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6700100 | 502544 | 2014 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Influence of rainfall on the noise shielding by a green roof
ترجمه فارسی عنوان
تاثیر بارندگی بر روی محافظ سر و صدا توسط یک سقف سبز
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کلمات کلیدی
سقف سبز، سر و صدا، محافظ، مرطوب، پاکت ساختمان،
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی انرژی
انرژی های تجدید پذیر، توسعه پایدار و محیط زیست
چکیده انگلیسی
The potential of a green roof to reduce diffracting sound waves towards a shielded side of a building has been assessed before by both in-situ and laboratory experiments, and by numerical simulations. However, like any porous material, the acoustic performance of the green roof's substrate could suffer from the presence of water. A 46-day lasting controlled sound propagation experiment was set up near the edge of a 6-m tall building equipped with an extensive green roof, having a substrate thickness of 7Â cm. At selected moments, test signals were emitted, allowing to monitor the attenuation between a reference microphone and a microphone at low height positioned on the green roof (at 15.3Â m from the roof's edge). Meteorological parameters and the green roof's substrate moisture content were continuously measured. Sound diffracting over a green roof showed to be sensitive to the substrate moisture content in a specific sound frequency range, more precisely between 250Â Hz and 1250Â Hz. The difference in noise attenuation between a rather dry state (0.1Â m3/m3) of the substrate and the maximum observed volumetric water content (close to saturation, 0.33Â m3/m3) could range up to 10Â dB. However, calculations show that the impact of the water content in an extensive green roof substrate for the specific case of road traffic noise abatement is expected to be limited.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Building and Environment - Volume 82, December 2014, Pages 1-8
Journal: Building and Environment - Volume 82, December 2014, Pages 1-8
نویسندگان
T. Van Renterghem, D. Botteldooren,