Page 117 - 应用声学2019年第5期

第 38 卷 第 5 期 Vol. 38, No. 5
2019 年 9 月 Journal of Applied Acoustics September, 2019

⋄ 研究报告 ⋄

吸声型薄膜声学超材料低频宽带吸声性能研究 ∗

张忠刚 朱浩宇 罗 剑 † 马炳和 †

(西北工业大学 空天微纳系统教育部重点实验室 西安 710072)

摘要 该文根据吸声型薄膜声学超材料的吸声机理，在传统的吸声型薄膜声学超材料结构的基础上引入质量
非对称结构，优化了不同厚度质量片的排布方式，并根据优化结果制备了能够实现低频宽带吸声效果的薄膜
声学超材料样品。对其进行声学实验，测试结果显示，样品在 100 ∼ 1000 Hz 频率范围内的平均吸声系数达
0.25，并在 250 ∼ 800 Hz 频率范围内出现了多个共振吸收峰，且实验测得的吸声系数曲线与仿真曲线的趋势
有较高的一致性。因此，该样品实现了低频宽带吸声。
关键词 吸声型薄膜声学超材料，质量非对称结构，低频宽带吸声，吸声系数测量
中图法分类号: O422.8 文献标识码: A 文章编号: 1000-310X(2019)05-0869-07
DOI: 10.11684/j.issn.1000-310X.2019.05.017

The investigation on low-frequency broadband acoustic absorption performance
of membrane sound-absorbing metamaterial

ZHANG Zhonggang ZHU Haoyu LUO Jian MA Binghe

(Key Laboratory of Micro/Nano Systems for Aerospace, Ministry of Education, Northwestern Polytechnical University,
Xi’an 710072, China)

Abstract Based on the sound absorption mechanism of membrane sound-absorbing metamaterial, an opti-
mized membrane acoustic metamaterial sample with mass-asymmetric rigid platelets was prepared on the basis
of the structure of mass-symmetric sound-absorbing metamaterial, and its acoustic absorption performance was
tested by using an acoustic impedance tube test system. The experimental results show that the average sound
absorption coefficient of the sample reaches 0.25 in the frequency range of 100–1000 Hz, several resonance ab-
sorption peaks appear in the frequency range of 250–800 Hz, and the trend of the sound absorption coefficient
curve measured by the experiment is relatively consistent with that of the simulation curve. Therefore, the
sample realizes low frequency broadband sound absorption.
Key words Membrane sound-absorbing metamaterial, Mass-asymmetric structure, Low frequency broadband
acoustic absorption, Sound absorption coefficient measurement

2018-09-09 收稿; 2019-03-08 定稿
国家自然科学基金项目 (51775446), 国家自然科学基金青年基金项目 (51741507)
∗
作者简介: 张忠刚 (1990- ), 男, 山东青岛人, 博士研究生, 研究方向: 微纳加工制造。
† 通讯作者 E-mail: jian.luo@nwpu.deu.cn; mabh@nwpu.edu.cn