Multi-band asymmetric acoustic transmission in a bended waveguide with multiple mechanisms

Journal Article (Journal Article)

We report the realization of a multi-band device of the asymmetric acoustic transmission by placing a phononic crystal inside a bended waveguide immersed in water, as determined both experimentally and numerically. The asymmetric acoustic transmission exists in three frequency bands below 500 kHz induced by multiple mechanisms. Besides the band gap of the phononic crystal, we also introduce the deaf mode and interaction between the phononic crystal and waveguide. More importantly, this asymmetric transmission can be systematically controlled by mechanically rotating the square rods of the phononic crystal. The device has the advantages of multiple band, broader bandwidth, and adjustable property, showing promising applications in ultrasonic devices.

Full Text

Duke Authors

Cited Authors

  • Huang, YL; Sun, HX; Xia, JP; Yuan, SQ; Ding, XL

Published Date

  • July 4, 2016

Published In

Volume / Issue

  • 109 / 1

International Standard Serial Number (ISSN)

  • 0003-6951

Digital Object Identifier (DOI)

  • 10.1063/1.4955268

Citation Source

  • Scopus