Mechanism of airborne sound absorption through triboelectric effect for noise mitigation

Mechanism of airborne sound absorption through triboelectric effect for noise mitigation

Nature Communications

10.1038/s41467-024-53847-5

https://doi.org/10.1038/s41467-024-53847-5

Jingcheng Li, Yasmin Mohamed Yousry, Poh Chong Lim, Seeram Ramakrishna, Kui Yao

Triboelectric Dissipators, noise mitigation, piezoelectric, fibers, Composites

31 October 2024

Li, J., Yousry, Y. M., Lim, P. C., Ramakrishna, S., & Yao, K. (2024). Mechanism of airborne sound absorption through triboelectric effect for noise mitigation. Nature Communications, 15(1). https://doi.org/10.1038/s41467-024-53847-5

Shear mode-guided ultrasonic waves are highly regarded for submerged or subterranean structural health monitoring (SHM), owing to their nondispersive feature and minimized acoustic energy loss when in contact with liquid or solid. High-performance shear mode ceramic ultrasonic transducers with robustness and cost-effectiveness are highly demanded for underwater or underground SHM applications, especially in harsh environments. However, the implementation of discrete shear mode piezoelectric ceramic ultrasonic transducers is hindered by the inconsistency with manual installation, lack of conformability on curved surfaces, and unreliable acoustic coupling between the transducers and the structure. Here, direct-write conformable shear mode ultrasonic transducers made from piezoelectric lead-free ceramic coatings, which are in situ produced on steel structures by a scalable thermal spray process, are proposed. The obtained lead-free lithium-doped potassium sodium niobate (KNN-LN) ceramic coatings exhibit a high effective shear piezoelectric strain coefficient (d24, f) above 60 pm V−1 in a broad frequency range from 100 Hz to 200 kHz. The resulting conformable shear mode KNN-LN ceramic coating transducers successfully showcase the functions of exciting and detecting stable shear mode ultrasonic wave signals with operation temperature exceeding 200 °C and demonstrate reliable capability in defect detection in both air and liquid environments.

Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0)

This research / project is supported by the Agency for Science, Technology and Research - RIE2020 Advanced Manufacturing and Engineering Industry Alignment Fund–Pre-positioning Programme (IAF-PP)
Grant Reference no. : A20F5a0043

This research / project is supported by the Agency for Science, Technology and Research - Advanced Manufacturing and Engineering Programmatic Fund
Grant Reference no. : A20G9b0135

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https://oar.a-star.edu.sg/communities-collections/articles/22121

2041-1723

Institute of Materials Research and Engineering