Asymmetric transmission of acoustic waves in a layer thickness distribution gradient structure using metamaterials

Jung San Chen, I. Ling Chang, Wan Ting Huang, Lien Wen Chen, Guan Hua Huang

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)

Abstract

This research presents an innovative asymmetric transmission design using alternate layers of water and metamaterial with complex mass density. The directional transmission behavior of acoustic waves is observed numerically inside the composite structure with gradient layer thickness distribution and the rectifying performance of the present design is evaluated. The layer thickness distributions with arithmetic and geometric gradients are considered and the effect of gradient thickness on asymmetric wave propagation is systematically investigated using finite element simulation. The numerical results indicate that the maximum pressure density and transmission through the proposed structure are significantly influenced by the wave propagation direction over a wide range of audible frequencies. Tailoring the thickness of the layered structure enables the manipulation of asymmetric wave propagation within the desired frequency range. In conclusion, the proposed design offers a new possibility for developing directional-dependent acoustic devices.

Original languageEnglish
Article number095020
JournalAIP Advances
Volume6
Issue number9
DOIs
Publication statusPublished - 2016 Sep 1

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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