کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8942069 | 1645056 | 2018 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
A slim subwavelength absorber based on coupled microslits
ترجمه فارسی عنوان
جذب زیر باند طولی باریک بر اساس میکروسلیت های متصل شده
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
سایر رشته های مهندسی
مهندسی مکانیک
چکیده انگلیسی
Designing a perfect low frequency acoustic absorber with subwavelength thickness is always a challenge. Various designs including micro-perforated panels, acoustic metamaterials and metasurfaces have attracted significant interests in recent years. The present paper reports a slim subwavelength absorber based on a regular array of coupled microslits to achieve low frequency absorption. The absorption mechanism by the coupled microslits is investigated using acoustic impedance together with the reflection coefficient in the complex frequency plane. The geometry of the coupled microslits is optimized using a differential evolution algorithm to enhance the absorption in the frequency band from 300â¯Hz to 800â¯Hz under different condition. The ratio of the absorber thickness to wavelength at the lowest absorption peak is less than 3.4%, which confirms its operation in deep subwavelength regime. Finally, wide band absorption using coupled microslits is demonstrated by the experiment and simulation.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied Acoustics - Volume 142, 15 December 2018, Pages 11-17
Journal: Applied Acoustics - Volume 142, 15 December 2018, Pages 11-17
نویسندگان
Honggang Zhao, Yang Wang, Jihong Wen, Yiu Wai Lam, Olga Umnova,