ACOUSTIC INVESTIGATION ON A SUSTAINABLE AND VENTILATED SONIC CRYSTAL BARRIER FOR ENVIRONMENTAL NOISE ABSORPTION

Qiao Xiaoru; Choy Yat Sze

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Summary

Paper Title

ACOUSTIC INVESTIGATION ON A SUSTAINABLE AND VENTILATED SONIC CRYSTAL BARRIER FOR ENVIRONMENTAL NOISE ABSORPTION

Authors

Qiao Xiaoru
Choy Yat Sze

Modality

Onsite-Oral

Subject area

05.0. Aero- & Thermo-Acoustics: Fundamentals & Control Strategies

Publishing Date

25/09/2025

Country of Publishing

Brazil | Brasil

Language of Publishing

en-US

Paper Page

https://www.even3.com.br/anais/international-congress-exposition-noise-control-engineering/1092033-acoustic-investigation-on-a-sustainable-and-ventilated-sonic-crystal-barrier-for-environmental-noise-absorption

ISBN

978-65-272-1573-8

Keywords

Sonic crystal, noise absorption, recycled materials, sustainability

Summary

Sonic crystal (SC) structures have emerged as a promising solution for mitigating low-frequency environmental noise in densely populated areas, owing to their subwavelength dimensions and superior multifunctionality, including air ventilation and noise blocking. This study presents a novel design of locally resonant SC structures based on the generalized Snell’s law, enabling simplified optimization with predetermined lattice configurations. While such periodic structures exhibit high-efficiency sound shielding through reflection at specific resonant frequencies, their limited broadband sound absorption has restricted widespread application. To address this limitation, an antisymmetric Matryoshka-type unit cell design, combined with several accessible recycled materials as absorptive elements, has been proposed and optimized for improving broadband sound absorption in the low-frequency range around 800 Hz. Finite Element Method simulations followed by experimental measurements of transmission loss were employed to identify the optimal combination of the above-mentioned materials. The results demonstrate peak noise reduction exceeding 18 dB at locally resonant bandgaps, alongside significant broadband noise absorption achieved through the incorporation of sound-absorbing materials. The sustainable feature of the composite SC structures would benefit residents by facilitating wastes recycle and reducing noise pollution, resulting in an enhanced living environment.

Title of the Event: Inter-Noise 2025
City of the Event: São Paulo
Title of the Proceedings of the event: Proceedings of the 54th International Congress and Exposition on Noise Control Engineering
Name of the Publisher: Even3
Means of Dissemination: Meio Digital

How to cite

XIAORU, Qiao; SZE, Choy Yat. ACOUSTIC INVESTIGATION ON A SUSTAINABLE AND VENTILATED SONIC CRYSTAL BARRIER FOR ENVIRONMENTAL NOISE ABSORPTION.. In: Proceedings of the 54th International Congress and Exposition on Noise Control Engineering. Anais...Sao Paulo(SP) WTC Events Center, 2025. Available in: https//www.even3.com.br/anais/international-congress-exposition-noise-control-engineering/1092033-ACOUSTIC-INVESTIGATION-ON-A-SUSTAINABLE-AND-VENTILATED-SONIC-CRYSTAL-BARRIER-FOR-ENVIRONMENTAL-NOISE-ABSORPTION. Access in: 04/06/2026