Bandwidth broadening for transmission loss of acoustic waves using coupled membrane-ring structure

Jung San Chen, Yu Bin Chen, Hao Wei Chen, Yi Chen Yeh

研究成果: Article同行評審

7 引文 斯高帕斯(Scopus)

摘要

Recently, membrane-type acoustic metamaterials have been found useful in eliminating lowfrequency sound/noise. Those materials exhibit unusual vibroacosutic behavior and have a negative value in mass density. In this study, we present a new design of acoustic metamaterials that can effectively broaden sound attenuation zone and achieve acoustic negativity in mass density/bulk modulus. The proposed structure is comprised of two membranes and two ring masses which are attached on membrane surfaces, respectively. Both dipolar and monopolar resonance exist in the proposed coupled system, which makes acoustic negativity possible. By altering mass magnitude and membrane tension the transmission loss peak frequency can be easily tuned. With two membranes having two rings of different magnitudes, the attenuation bandwidth can be effectively broadened.

原文English
文章編號105801
期刊Materials Research Express
3
發行號10
DOIs
出版狀態Published - 2016 十月

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Biomaterials
  • Surfaces, Coatings and Films
  • Polymers and Plastics
  • Metals and Alloys

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