دانلود مقاله ISI انگلیسی شماره 64830
عنوان فارسی مقاله

بررسی اثر بارش بر روی محافظ سر و صدا توسط یک بام سبز

کد مقاله سال انتشار مقاله انگلیسی ترجمه فارسی تعداد کلمات
64830 2014 8 صفحه PDF سفارش دهید محاسبه نشده
خرید مقاله
پس از پرداخت، فوراً می توانید مقاله را دانلود فرمایید.
عنوان انگلیسی
Influence of rainfall on the noise shielding by a green roof
منبع

Publisher : Elsevier - Science Direct (الزویر - ساینس دایرکت)

Journal : Building and Environment, Volume 82, December 2014, Pages 1–8

کلمات کلیدی
سقف سبز؛ سر و صدا؛ محافظ؛ مرطوب؛ پوشش ساختمان
پیش نمایش مقاله
پیش نمایش مقاله بررسی اثر بارش بر روی محافظ سر و صدا توسط یک بام سبز

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 7 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 15.3 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 250 Hz and 1250 Hz. The difference in noise attenuation between a rather dry state (0.1 m3/m3) of the substrate and the maximum observed volumetric water content (close to saturation, 0.33 m3/m3) could range up to 10 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.

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