Mechanism of airborne sound absorption through triboelectric effect for noise mitigation.

Autor: Li J; Institute of Materials Research and Engineering (IMRE), Agency for Science, Technology and Research (A*STAR), 2 Fusionopolis Way, Singapore, 138634, Republic of Singapore.; Department of Mechanical Engineering, College of Design and Engineering, National University of Singapore, Singapore, 117575, Republic of Singapore., Yousry YM; Institute of Materials Research and Engineering (IMRE), Agency for Science, Technology and Research (A*STAR), 2 Fusionopolis Way, Singapore, 138634, Republic of Singapore., Lim PC; Institute of Materials Research and Engineering (IMRE), Agency for Science, Technology and Research (A*STAR), 2 Fusionopolis Way, Singapore, 138634, Republic of Singapore., Ramakrishna S; Department of Mechanical Engineering, College of Design and Engineering, National University of Singapore, Singapore, 117575, Republic of Singapore. seeram@nus.edu.sg., Yao K; Institute of Materials Research and Engineering (IMRE), Agency for Science, Technology and Research (A*STAR), 2 Fusionopolis Way, Singapore, 138634, Republic of Singapore. k-yao@imre.a-star.edu.sg.
Jazyk: angličtina
Zdroj: Nature communications [Nat Commun] 2024 Oct 31; Vol. 15 (1), pp. 9408. Date of Electronic Publication: 2024 Oct 31.
DOI: 10.1038/s41467-024-53847-5
Abstrakt: Mitigating broadband noise with passive airborne sound absorbers has been a long-lasting challenge, particularly for low-frequency anthropogenic sounds below kilohertz with long wavelengths, which require bulky materials for effective absorption. Here, we propose a strategy that utilizes local triboelectric effect and in-situ electrical energy dissipation mechanism for airborne sound absorption. This approach involves a fundamentally different mechanism that converts airborne sound into electricity for energy dissipation, in contrast to conventional mechano-thermal energy conversion mechanisms. We establish an equivalent acoustic impedance model to provide theoretical analysis of the underlying sound absorption mechanisms, with a theoretical maximum mechano-electro-thermal coupling efficiency approaching 100% under optimal conditions. We design fibrous triboelectric composite foam materials accordingly and show their substantially boosted acoustic absorption performance experimentally, where the adoption of diverse triboelectric material pairs validates that a larger difference in material charge affinities intensifies the local triboelectric effect and results in higher acoustic absorbing performance.
(© 2024. The Author(s).)
Databáze: MEDLINE
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