Design and demonstration of acoustic bends with metamaterials

Yuzhen Yang, Han Jia, Wenjia Lu, Jun Yang

Research output: Contribution to conferencePaperpeer-review

Abstract

In this paper, we propose the design of broadband acoustic bends in air. A bending structure composed of perforated panels with various hole-sizes is firstly realized and experimentally demonstrated in a 2D waveguide. However, the perforated plates only tune the refractive index of the unit cell, resulting in impedance mismatch between the structure and the air. Then, we introduce side pipes with various volumes to adjust the impedance of the acoustic bend. Both the simulated and experimental results verify that the acoustic beam can be rotated smoothly through these bends in a wide frequency range. In addition, the transmission intensity is higher than 90% after improving the impedance of the bend. The good performance of these acoustic bends shows their potential applications in many fields, like detection and absorption in pipelines.

Original languageEnglish
Publication statusPublished - 2018
Externally publishedYes
Event47th International Congress and Exposition on Noise Control Engineering: Impact of Noise Control Engineering, INTER-NOISE 2018 - Chicago, United States
Duration: Aug 26 2018Aug 29 2018

Conference

Conference47th International Congress and Exposition on Noise Control Engineering: Impact of Noise Control Engineering, INTER-NOISE 2018
Country/TerritoryUnited States
CityChicago
Period8/26/188/29/18

Bibliographical note

Publisher Copyright:
© INTER-NOISE 2018 - 47th International Congress and Exposition on Noise Control Engineering: Impact of Noise Control Engineering. All rights reserved.

ASJC Scopus Subject Areas

  • Acoustics and Ultrasonics

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