کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7152436 | 1462394 | 2017 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
A maze structure for sound attenuation
ترجمه فارسی عنوان
ساختار پیچ و خم برای کاهش صدا
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کلمات کلیدی
مارپیچ، سر و صدا، از دست دادن درج، کریستال صوتی،
موضوعات مرتبط
مهندسی و علوم پایه
سایر رشته های مهندسی
مهندسی مکانیک
چکیده انگلیسی
Sonic crystals are periodic arrangement of scatterers made of material with low acoustic impedance or sound hard materials [1]. Sonic crystals have numerous applications such as green belts and sound barriers. Here we showed that a typical maze structure at children playground can attenuate noise effectively for frequencies ranging from 12.5Â Hz to 20,000Â Hz. The original designer for the maze structure probably does not have that in mind. The maze structure can be viewed as a sonic crystal structure with sound attenuation characteristics. We found that the maze was able to attenuate noise up to 17.9Â dBA for frequency range below 1000Â Hz and 23Â dBA for higher frequency range up to 20,000Â Hz. The maze structure was able to mitigate noise at a wide range of frequencies in addition to the center frequency (fc) of 478Â Hz which was estimated based on the Bragg's Law. The periodic effects of the maze was also proven by numerical studies. Our results demonstrated that the maze structure commonly found in children playgrounds was able to attenuate noise covering the whole human hearing range.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied Acoustics - Volume 115, 1 January 2017, Pages 88-92
Journal: Applied Acoustics - Volume 115, 1 January 2017, Pages 88-92
نویسندگان
Hsiao Mun Lee, Kian Meng Lim, Heow Pueh Lee,