An acoustic metamaterial bending waveguide design using transformation acoustics

Liang Yu Wu, Tzeh Yi Chiang, Mei Ling Wu, Lien Wen Chen

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

An acoustic bending waveguide is designed by transformation acoustics. A two-dimensional square area with anisotropic and homogeneous material properties is transformed into a fan-shaped area with anisotropic and inhomogeneous material properties to rotate the direction of beam propagation. The transformation medium can be realized by alternating layered structure consisting of water and fluid with negative mass density. We propose that an acoustic metamaterial composed of three layers in water background can be designed to replace negative mass density fluid and achieve the acoustic bending waveguide.

Original languageEnglish
Title of host publicationMechanics of Solids, Structures and Fluids; Vibration, Acoustics and Wave Propagation
PublisherAmerican Society of Mechanical Engineers (ASME)
Pages937-943
Number of pages7
ISBN (Print)9780791854945
DOIs
Publication statusPublished - 2011 Jan 1
EventASME 2011 International Mechanical Engineering Congress and Exposition, IMECE 2011 - Denver, CO, United States
Duration: 2011 Nov 112011 Nov 17

Publication series

NameASME 2011 International Mechanical Engineering Congress and Exposition, IMECE 2011
Volume8

Other

OtherASME 2011 International Mechanical Engineering Congress and Exposition, IMECE 2011
CountryUnited States
CityDenver, CO
Period11-11-1111-11-17

All Science Journal Classification (ASJC) codes

  • Mechanical Engineering

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  • Cite this

    Wu, L. Y., Chiang, T. Y., Wu, M. L., & Chen, L. W. (2011). An acoustic metamaterial bending waveguide design using transformation acoustics. In Mechanics of Solids, Structures and Fluids; Vibration, Acoustics and Wave Propagation (pp. 937-943). (ASME 2011 International Mechanical Engineering Congress and Exposition, IMECE 2011; Vol. 8). American Society of Mechanical Engineers (ASME). https://doi.org/10.1115/imece2011-63290