Low-frequency broadband acoustic ventilation metamaterial via cascaded massless-membrane-integrated Helmholtz resonators

IF 4.3 2区物理与天体物理 Q1 ACOUSTICS

Applied Acoustics Pub Date : 2026-02-05 Epub Date: 2025-11-08 DOI:10.1016/j.apacoust.2025.111152

Xiaodong Zhang , Jing Nie , Yang Liu , Fengbin Lin , Jinhong He , Rui Yang , Huiyong Yu

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引用次数: 0

Abstract

Noise generated by pipelines poses a critical challenge to ensuring passenger comfort in transportation systems. Conventional noise control devices inherently face a trade-off between noise attenuation performance and ventilation efficiency. To address this challenge, this study presents a ventilated acoustic metamaterial that combines a massless, stress-free thermoplastic polyurethane (TPU) membrane with cascaded Helmholtz resonator (membrane-cascaded HR). By modulating the membrane’s placement within the membrane-cascaded HR cavity, the structure enables frequency tuning without altering unit dimensions, thus facilitating efficient noise mitigation in confined geometries. Finite element simulations and experimental results validate that the proposed membrane-cascaded HR group achieves a broadband sound transmission loss (STL) exceeding 10 dB in the low frequency range. Remarkably, the compact membrane-cascaded HR group features sub-wavelength dimensions and exceptional parametric stability. Composed of seven units, it maintains robust performance under 30 % variations in TPU membrane Young’s modulus (14–20 MPa). Experimental validations in both straight and curved ducts confirm consistent frequency-selective attenuation performance. This work offers a practical approach for mitigating low-frequency noise in ventilation systems.

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通过级联无质量膜集成亥姆霍兹谐振器的低频宽带声通风超材料

管道产生的噪声对交通系统中乘客的舒适性提出了严峻的挑战。传统的噪声控制设备固有地面临着噪声衰减性能和通风效率之间的权衡。为了应对这一挑战，本研究提出了一种通风声学超材料，该材料将无质量、无应力的热塑性聚氨酯（TPU）膜与级联亥姆霍兹谐振器（膜级联HR）结合在一起。通过调节膜在膜级联HR腔内的位置，该结构可以在不改变单元尺寸的情况下进行频率调节，从而在受限的几何形状中有效地降低噪声。有限元模拟和实验结果验证了所提出的膜级联HR组在低频范围内实现了超过10 dB的宽带声传输损失（STL）。值得注意的是，紧凑的膜级联HR基团具有亚波长尺寸和优异的参数稳定性。它由7个单元组成，在TPU膜杨氏模量（14-20 MPa）变化30%的情况下仍能保持强劲的性能。在直线和弯曲管道中的实验验证证实了一致的频率选择衰减性能。这项工作为减轻通风系统中的低频噪声提供了一种实用的方法。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Applied Acoustics 物理-声学

CiteScore

7.40

自引率

11.80%

发文量

618

审稿时长

7.5 months

期刊介绍： Since its launch in 1968, Applied Acoustics has been publishing high quality research papers providing state-of-the-art coverage of research findings for engineers and scientists involved in applications of acoustics in the widest sense. Applied Acoustics looks not only at recent developments in the understanding of acoustics but also at ways of exploiting that understanding. The Journal aims to encourage the exchange of practical experience through publication and in so doing creates a fund of technological information that can be used for solving related problems. The presentation of information in graphical or tabular form is especially encouraged. If a report of a mathematical development is a necessary part of a paper it is important to ensure that it is there only as an integral part of a practical solution to a problem and is supported by data. Applied Acoustics encourages the exchange of practical experience in the following ways: • Complete Papers • Short Technical Notes • Review Articles; and thereby provides a wealth of technological information that can be used to solve related problems. Manuscripts that address all fields of applications of acoustics ranging from medicine and NDT to the environment and buildings are welcome.