论文期刊

A thin multi-order Helmholtz metamaterial with extraordinary perfect acoustic absorption within 400 Hz – 2800 Hz




作者: Chong Rui Liu, Jiu Hui Wu
发表/完成日期: 2019-07-01
期刊名称: Appl. Phys. Exp.
期卷: Vol.12, 2019
相关文章: Liu_2019_Appl._Phys._Express_A thin multi-order Helmholtz metamaterial with perfect broadbandacoustic absorption.pdf   
论文简介
We propose a multi-order Helmholtz metamaterial with deep-subwavelength thickness in which perfect continuous acoustic absorption is achieved
within 400 Hz ∼ 2800 Hz. The metamaterial is composed of multiple detuned cells, each of which is constructed by several perforated plates
inserting into the cavity of a Helmholtz resonator (HR) and hence gains multiple individually-tuned high-order peaks besides the original HR peak.
By precisely designing each peak of the cells, the extra-broadband perfect absorption can be obtained. This kind of metamaterials could possess
broad applications in noise control engineering owing to the extraordinary absorption performance and high flexural stiffness.