Improving absorption performance of resonant metamaterials using self-complementary shapes

Author:

Gebrekidan Semere B.1ORCID,Eser Martin1ORCID,Maeder Marcus1ORCID,Marburg Steffen1ORCID

Affiliation:

1. Vibroacoustics of Vehicles and Machines, Technical University of Munich , Garching 85748, Germany

Abstract

In electromagnetics, self-complementary antenna shapes possess a frequency-independent characteristic due to their particular shape. Based on this concept, this paper investigates the potential applications of self-complementary shapes for sound absorption to broaden the bandwidth and enhance the performances of resonators without altering the sizes and resonance frequencies. Self-complementary shapes, such as log-periodic planar tooth and log-spiral shapes, are used to demonstrate the effectiveness of our approach in enhancing the absorption bandwidth and performance of a resonator. Such shapes improve the absorption performance up to 58 % compared to a resonator with an equivalent circular area when the opening area is reduced, whereas they exhibit weak performance for wide opening areas. Numerical and experimental analyses are conducted to verify their performances and to investigate the effect of the materials inside the backing cavity, neck length, opening size, and geometry on absorption. By extending the use of frequency-independent antenna shapes as sound-absorbing structures, this approach overcomes the inherent limitations of resonant metamaterials to achieve an enhanced sound absorption for various applications.

Funder

Alexander von Humboldt-Stiftung

Publisher

AIP Publishing

Subject

Physics and Astronomy (miscellaneous)

同舟云学术

1.学者识别学者识别

2.学术分析学术分析

3.人才评估人才评估

"同舟云学术"是以全球学者为主线,采集、加工和组织学术论文而形成的新型学术文献查询和分析系统,可以对全球学者进行文献检索和人才价值评估。用户可以通过关注某些学科领域的顶尖人物而持续追踪该领域的学科进展和研究前沿。经过近期的数据扩容,当前同舟云学术共收录了国内外主流学术期刊6万余种,收集的期刊论文及会议论文总量共计约1.5亿篇,并以每天添加12000余篇中外论文的速度递增。我们也可以为用户提供个性化、定制化的学者数据。欢迎来电咨询!咨询电话:010-8811{复制后删除}0370

www.globalauthorid.com

TOP

Copyright © 2019-2024 北京同舟云网络信息技术有限公司
京公网安备11010802033243号  京ICP备18003416号-3