| INORGANIC MATERIALS AND CERAMIC MATRIX COMPOSITES |
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| Study on Low-frequency Broadband Sound Absorption Characteristics of Porous Labyrinth Acoustic Metamaterials |
| ZHENG Mingjun*, LI Haichao, LI Boyang
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| School of Mechanical Engineering, Shijiazhuang Tiedao University, Shijiazhuang 050043, China |
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Abstract Aiming at the problem that conventional sound-absorbing materials are difficult to achieve low-frequency broadband efficient sound absorption in a limited space, a porous labyrinthine acoustic metamaterial structure with embedded slits is proposed. Based on theoretical analysis, the sound absorption mechanism of slits, labyrinth structures and porous materials is revealed, and the sound absorption coefficients of porous labyrinth acoustic metamaterials and their constituent structures are analyzed by establishing the acoustic-solid coupling finite element analysis model of the metamaterial structure. Through systematic parametric research and multi-parameter orthogonal optimization design, the regulation of key geometric dimensions and material parameters on the resonance frequency is deeply explored, and the optimal parameter combination is determined. The results show that the sound absorption coefficient of the optimized porous labyrinth acoustic metamaterial structure is stable above 0.77 in the frequency band of 350—1 200 Hz, and the sound absorption uniformity in this frequency band is improved. This study provides a new design idea for realizing low-frequency noise control in a limited space.
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Published: 25 July 2026
Online: 2026-08-12
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2026, Vol. 40 
