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

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)

Abstract

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.

Original languageEnglish
Article number105801
JournalMaterials Research Express
Volume3
Issue number10
DOIs
Publication statusPublished - 2016 Oct

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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