Achieving sound attenuation across a broad frequency range while maintaining adequate ventilation remains a significant challenge in acoustic engineering, as there exists a rigid trade-off between attenuation ability and ventilation. In this Letter, we propose a double-layered microperforated meta-shells to serve as broadband acoustic ventilation barrier. Multiple scattering theory is first employed to characterize sound attenuation performance of the proposed design in terms of both sound absorption and transmission loss, which is not reported before. Experimental result demonstrates a good enhancement of absorption due to the insertion of inner shell with a specific perforation rate of micro cores. The mechanism can be attributed to the inter-cell coupling, which is further utilized to devise a different configuration by wrapping the meta-shell with porous sponge. It is found that adding an extra layer of sponge can further improve the low-frequency attenuation performance. The proposed broadband sound barrier with effective ventilation can find potential applications in architectural acoustics and office noise insulation.
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5 June 2023
Research Article|
June 05 2023
Broadband acoustic attenuation in microperforated meta-shells with ventilation
Special Collection:
Fundamentals and Applications of Metamaterials: Breaking the Limits
Jiaji Chen
;
Jiaji Chen
(Formal analysis, Software, Writing – original draft, Writing – review & editing)
1
Department of Mechanical and Aerospace Engineering, University of Missouri
, Columbia, Missouri 65211, USA
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Yonghui Zhang;
Yonghui Zhang
(Validation, Writing – review & editing)
2
Key Laboratory of Dynamics and Control of Flight Vehicle of Ministry of Education, School of Aerospace Engineering, Beijing Institute of Technology
, Beijing 100081, China
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Yukai Yu
;
Yukai Yu
(Investigation, Software, Visualization)
1
Department of Mechanical and Aerospace Engineering, University of Missouri
, Columbia, Missouri 65211, USA
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Yao Zhai;
Yao Zhai
(Validation)
1
Department of Mechanical and Aerospace Engineering, University of Missouri
, Columbia, Missouri 65211, USA
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Huy Nguyen
;
Huy Nguyen
(Conceptualization, Formal analysis, Investigation)
1
Department of Mechanical and Aerospace Engineering, University of Missouri
, Columbia, Missouri 65211, USA
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Sharon Tracy
;
Sharon Tracy
(Funding acquisition, Supervision)
3
Materials Innovation, Steelcase Inc.
, Grand Rapids, Michigan 49508, USA
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Xiaoming Zhou
;
Xiaoming Zhou
a)
(Conceptualization, Validation, Writing – review & editing)
2
Key Laboratory of Dynamics and Control of Flight Vehicle of Ministry of Education, School of Aerospace Engineering, Beijing Institute of Technology
, Beijing 100081, China
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Guoliang Huang
Guoliang Huang
a)
(Conceptualization, Funding acquisition, Project administration, Supervision, Writing – review & editing)
1
Department of Mechanical and Aerospace Engineering, University of Missouri
, Columbia, Missouri 65211, USA
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Note: This paper is part of the APL Special Collection on Fundamentals and Applications of Metamaterials: Breaking the Limits.
Appl. Phys. Lett. 122, 231701 (2023)
Article history
Received:
March 31 2023
Accepted:
May 23 2023
Citation
Jiaji Chen, Yonghui Zhang, Yukai Yu, Yao Zhai, Huy Nguyen, Sharon Tracy, Xiaoming Zhou, Guoliang Huang; Broadband acoustic attenuation in microperforated meta-shells with ventilation. Appl. Phys. Lett. 5 June 2023; 122 (23): 231701. https://doi.org/10.1063/5.0152725
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