Acoustic ventilation barrier realized by impedance modulation via non-local metasurface

IF 9.4 1区工程技术 Q1 ENGINEERING, MECHANICAL

International Journal of Mechanical Sciences Pub Date : 2025-09-18 DOI:10.1016/j.ijmecsci.2025.110837

Bin Jia , Nengyin Wang , Yabin Jin , Yongdong Pan , Kai Zhang , Yanxun Xiang , Yong Li

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引用次数: 0

Abstract

Conventional acoustic barriers often face inherent compromises among noise insulation, ventilation efficiency, bandwidth, and pressure loss. In this study, we introduce a broadband acoustic ventilated barrier utilizing an impedance-modulated non-local metasurface, which enables precise control of the effective acoustic impedance through coupled neck-embedded Helmholtz resonator (NEHR) units. The innovative parallel configuration of these units facilitates strong non-local coupling, effectively suppressing anti-resonance and overcoming the narrowband limitations typical of traditional resonant sound-insulating structures. Experimental results validate the theoretical framework based on the mode matching method, demonstrating that the proposed barrier achieves over 90 % sound energy isolation (exceeding 10 dB transmission loss) across the 600–1600 Hz frequency range while maintaining a 20 % open ventilation area. This work establishes a new paradigm for ventilated sound-insulating barriers and offers a promising solution for broadband acoustic insulation in practical applications requiring simultaneous ventilation.

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非局部超表面阻抗调制实现的声通气屏障

传统的隔音屏障往往面临着在隔音、通风效率、带宽和压力损失之间的内在妥协。在这项研究中，我们引入了一种利用阻抗调制的非局部超表面的宽带声通风屏障，它可以通过耦合颈部嵌入式亥姆霍兹谐振器（NEHR）单元精确控制有效声阻抗。这些单元的创新并联配置促进了强非局部耦合，有效地抑制了反谐振，克服了传统谐振式隔声结构典型的窄带限制。实验结果验证了基于模式匹配方法的理论框架，表明所提出的屏障在600-1600 Hz频率范围内实现了超过90%的声能隔离（超过10 dB的传输损耗），同时保持了20%的开放通风面积。本研究建立了通风隔声屏障的新范例，为需要同时通风的实际应用中的宽带隔声提供了一个有希望的解决方案。

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来源期刊

International Journal of Mechanical Sciences 工程技术-工程：机械

CiteScore

12.80

自引率

17.80%

发文量

769

审稿时长

19 days

期刊介绍： The International Journal of Mechanical Sciences (IJMS) serves as a global platform for the publication and dissemination of original research that contributes to a deeper scientific understanding of the fundamental disciplines within mechanical, civil, and material engineering. The primary focus of IJMS is to showcase innovative and ground-breaking work that utilizes analytical and computational modeling techniques, such as Finite Element Method (FEM), Boundary Element Method (BEM), and mesh-free methods, among others. These modeling methods are applied to diverse fields including rigid-body mechanics (e.g., dynamics, vibration, stability), structural mechanics, metal forming, advanced materials (e.g., metals, composites, cellular, smart) behavior and applications, impact mechanics, strain localization, and other nonlinear effects (e.g., large deflections, plasticity, fracture). Additionally, IJMS covers the realms of fluid mechanics (both external and internal flows), tribology, thermodynamics, and materials processing. These subjects collectively form the core of the journal's content. In summary, IJMS provides a prestigious platform for researchers to present their original contributions, shedding light on analytical and computational modeling methods in various areas of mechanical engineering, as well as exploring the behavior and application of advanced materials, fluid mechanics, thermodynamics, and materials processing.