Ultrathin low-frequency tunable sound absorbing structure based on buckling plates

IF 3.4 2区物理与天体物理 Q1 ACOUSTICS

Applied Acoustics Pub Date : 2025-04-23 DOI:10.1016/j.apacoust.2025.110721

Yifan Zhang, Xianhui Li, Xiaoling Gai, Tuo Xing

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引用次数: 0

Abstract

To overcome the complexity and limited tunability of deep subwavelength sound absorbers, a low-frequency tunable buckling plate resonator is proposed. The structure comprises an ultrathin steel plate, a frame, and a sealed air cavity. By applying uniaxial in-plane load to adjust the stiffness of the plate, frequency tunability is achieved without altering the structural parameters of the absorber. A theoretical model and a finite element model were established to analyze its acoustic performance, and parametric analysis was performed to determine suitable configurations for achieving deep subwavelength absorption. Experimental and numerical results demonstrate highly efficient sound absorption in the frequency range of 332–404 Hz, with a half-absorption bandwidth of 15–20 Hz. The absorber operates at deep subwavelength scales, with a thickness about 1/172th of the maximal working wavelength of sound wave. Compared to existing deep subwavelength absorbers, the proposed absorber features a simpler structure and enhanced tunability.

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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.