Broadband ultrasound-trapping barrier based on hollow cylinder with a periodic grating

Zheng Xu; Hongsheng Zhou; Xu Yan; Qian Cheng; Xiaojun Liu

doi:10.1016/j.ultras.2018.09.005

Broadband ultrasound-trapping barrier based on hollow cylinder with a periodic grating

Ultrasonics. 2019 Mar:93:102-106. doi: 10.1016/j.ultras.2018.09.005. Epub 2018 Sep 21.

Authors

Zheng Xu¹, Hongsheng Zhou², Xu Yan¹, Qian Cheng³, Xiaojun Liu⁴

Affiliations

¹ Institute of Acoustics, Tongji University, Shanghai 200092, China.
² Shanghai Acoustics Laboratory, Chinese Academy of Sciences, Shanghai 200032, China.
³ Institute of Acoustics, Tongji University, Shanghai 200092, China. Electronic address: q.cheng@tongji.edu.cn.
⁴ Key Laboratory of Modern Acoustics, School of Physics, Nanjing University, Nanjing 210093, China. Electronic address: liuxiaojun@nju.edu.cn.

PMID: 30476782
DOI: 10.1016/j.ultras.2018.09.005

Abstract

It is important to modulate ultrasonic waves in some ultrasonic application fields. We formed an ultrasound-trapping barrier through a hollow cylinder with a periodic grating on the surface and simulated the barrier using the finite element method. Using the Schlieren imaging technique, we visualized the ultrasound field distribution in the structure. Both the experimental and simulation results revealed that the structure can work in a broadband frequency range, demonstrating the effectiveness and practicability of the structure as a virtual ultrasound barrier. We also describe how the silent region and the ultrasound intensity can be adjusted in the hollow cylinder.

Keywords: Schlieren imaging; Silent region; Ultrasonic device; Virtual ultrasound barrier.