From directional to omnidirectional: meta-devices for ultrabroadband sound absorption with near-causality-limit performance

Traditional microperforated panel (MPP)-cavity absorbers and metamaterial-based sound absorbers rely on local resonances or multi-resonator designs, which limit their bandwidth, angular applicability, and ease of fabrication. Leveraging the reciprocity theorem and cavity resonances, we introduce a robust class of MPP absorbers, termed meta-MPPs, capable of achieving ultrabroadband near-total sound absorption across a range of 0.37 to 10 kHz. These absorbers demonstrate average performance exceeding that of traditional MPP-cavity absorbers, approaching the theoretical causality limit. Notably, their absorption performance can be tuned between angularly asymmetric and omnidirectional modes and remains highly robust to variations in MPP parameters and geometrical configurations. Validated through simulations and experiments, our findings present a simpler, more robust, and highly adaptable solution for noise control.

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Publication Details

Journal
Materials Horizons
Published
2025-01-01
DOI
https://doi.org/10.1039/d5mh00404g
Primary Topic
Acoustic Wave Phenomena Research
Type
article
Field-Weighted Citation Impact
0.00

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article

From directional to omnidirectional: meta-devices for ultrabroadband sound absorption with near-causality-limit performance

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Materials Horizons
Acoustic Wave Phenomena Research
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From directional to omnidirectional: meta-devices for ultrabroadband sound absorption with near-causality-limit performance

Yun Lai, Y. Jing, Jensen Li, Chenkai Liu, Chang‐Qing Xu, Xiaozhou Liu, Jinjie Shi, Hongchen Chu, Jie Luo
article en

Abstract

Traditional microperforated panel (MPP)-cavity absorbers and metamaterial-based sound absorbers rely on local resonances or multi-resonator designs, which limit their bandwidth, angular applicability, and ease of fabrication. Leveraging the reciprocity theorem and cavity resonances, we introduce a robust class of MPP absorbers, termed meta-MPPs, capable of achieving ultrabroadband near-total sound absorption across a range of 0.37 to 10 kHz. These absorbers demonstrate average performance exceeding that of traditional MPP-cavity absorbers, approaching the theoretical causality limit. Notably, their absorption performance can be tuned between angularly asymmetric and omnidirectional modes and remains highly robust to variations in MPP parameters and geometrical configurations. Validated through simulations and experiments, our findings present a simpler, more robust, and highly adaptable solution for noise control.

Materials HorizonsVol. 12(21)
Nanjing Normal University (CN), Hong Kong University of Science and Technology (HK), University of Exeter (GB), Soochow University (CN), Collaborative Innovation Center of Advanced Microstructures (CN), University of Hong Kong (HK)
National Natural Science Foundation of China, China Postdoctoral Science Foundation, Research Grants Council, University Grants Committee, Natural Science Foundation of Jiangsu Province, National Key Research and Development Program of China
Affordable and clean energy
Openalex Percentile: Top 83%
Acoustic Wave Phenomena Research
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