Zhang Xiaodong, He Jinhong, Nie Jing, Liu Yang, Yu Huiyong, Chen Qi, Yang Jianxing
College of Mechanical Engineering and Automation, Huaqiao University, Xiamen 361021, China.
Jilin Jinheng Auto Parts Co., Ltd., Jilin 132000, China.
Materials (Basel). 2025 Apr 29;18(9):2029. doi: 10.3390/ma18092029.
Balancing ventilation and broadband sound insulation remains a significant challenge in noise control engineering, particularly when simultaneous airflow and broadband noise reduction are required. Conventional porous absorbers and membrane-type metamaterials remain fundamentally constrained by ventilation-blocking configurations or narrow operational bandwidths. This study presents a ventilated composite metamaterial unit (VCMU) co-integrating optimized labyrinth channels and the Helmholtz resonators within a single-plane architecture. This design achieves exceptional ventilation efficiency through a central flow channel while maintaining sub-λ/30 thickness (λ/31 at 860 Hz). Coupled transfer matrix modeling and finite-element simulations reveal that Fano-Helmholtz resonance mechanisms synergistically generate broadband transmission loss (STL) spanning 860-1634 Hz, with six STL peaks in the 860 and 1634 Hz bands (mean 18.4 dB). Experimental validation via impedance tube testing confirmed excellent agreement with theoretical and simulation results. The geometric scalability allows customizable acoustic bandgaps through parametric control. This work provides a promising solution for integrated ventilation and noise reduction, with potential applications in building ventilation systems, industrial pipelines, and other noise-sensitive environments.
在噪声控制工程中，平衡通风和宽带隔音仍然是一项重大挑战，尤其是在需要同时实现气流和宽带降噪的情况下。传统的多孔吸声器和膜型超材料在根本上仍受通风受阻结构或狭窄工作带宽的限制。本研究提出了一种通风复合超材料单元（VCMU），它在单平面结构中共同集成了优化的迷宫通道和亥姆霍兹谐振器。这种设计通过中央流道实现了卓越的通风效率，同时保持了亚λ/30的厚度（860Hz时为λ/31）。耦合传递矩阵建模和有限元模拟表明，法诺 - 亥姆霍兹共振机制协同产生了860 - 1634Hz的宽带传输损耗（STL），在860和1634Hz频段有六个STL峰值（平均18.4dB）。通过阻抗管测试进行的实验验证证实了与理论和模拟结果的高度一致性。几何可扩展性允许通过参数控制实现可定制的声学带隙。这项工作为集成通风和降噪提供了一个有前景的解决方案，在建筑通风系统、工业管道和其他对噪声敏感的环境中具有潜在应用。
