کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
753147 1462395 2016 11 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Design and experimental tests of active control barriers for low-frequency stationary noise reduction in urban outdoor environment
ترجمه فارسی عنوان
طراحی و آزمایشی از موانع کنترل فعال برای کاهش سر و صدای ثابت در محیط فضای شهری
کلمات کلیدی
کنترل نویز فعال، مانع فعال سر و صدا، سر و صدای ایستادنی با فرکانس پایین، سر و صدای شهری
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی مکانیک
چکیده انگلیسی


• Design of active noise control barriers for outdoor noise abatement in urban environment.
• Application to low-frequency stationary noise in power plants.
• On-the field experimental tests demonstrating the effectiveness of the system.

Active noise control (ANC) techniques are based on the emission of an antiphase signal in order to cancel the noise produced by a primary source. ANC has been successfully applied especially for reducing noise in confined environments, such as headphones and ducts. In this study, we present an application of ANC concepts to the design of an anti-noise barrier for an outdoor environment and its experimental testing. Even though passive techniques are effective in noise reduction at middle-high frequencies, they become less efficient at low frequencies (below 300 Hz) due to the limited dimensions of commonly deployable barriers. In this paper, we analyze the properties of a low-cost active noise system able to efficiently operate on stationary, almost pure-tone, low-frequency noise, such as that produced by electrical transformers and reactors in power and transformation plants. A prototype has been implemented and on-the-field experimental tests have been carried out. The results (confirmed also by numerical simulations) demonstrate a remarkable efficiency in the far field, with a reduction up to 15 dB with respect to the absence of the ANC system.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied Acoustics - Volume 114, 15 December 2016, Pages 125–135
نویسندگان
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