Gradient index metamaterials for broadband underwater sound absorption

Xiao Pan; Xinsheng Fang; Xuewen Yin; Yan Li; Yongdong Pan; Yabin Jin

doi:10.1063/5.0190946

journal article Open Access Mar 01, 2024

Gradient index metamaterials for broadband underwater sound absorption

Xiao Pan

Xinsheng Fang

Xuewen Yin Yan Li

Yongdong Pan

Yabin Jin

APL Materials Vol. 12 No. 3 · AIP Publishing

View at Publisher Save 10.1063/5.0190946

Abstract

The underwater broadband anechoic coating is highly demanded in acoustic stealth for underwater vehicles. In this work, we propose a gradient index metamaterial for broadband underwater sound absorption, which is further experimentally validated under high pressure conditions. The gradient index metamaterial consisting of radius-varied cavities in rubber allows the sound waves to follow the objective trajectory in a broad band with impedance matching at the interface with water. The viscosity of the materials and the coupling effect among the gradient cavities contribute to broadband sound absorption. The performance of broadband sound absorption from 1 to 10 kHz is validated experimentally, which agrees well with the theoretical and numerical results. We further experimentally demonstrate the sound absorption performance with hydrostatic pressure up to 3 MPa and analyze the mechanism of the sound absorption deviation caused by high pressures. The proposed gradient index metamaterial provides a simple and efficient way to develop underwater broadband acoustic coatings.

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Details

Published: Mar 01, 2024
Vol/Issue: 12(3)
License: View

Authors

X

Xiao Pan

School of Aerospace Engineering and Applied Mechanics, Tongji University 1 , 200092 Shanghai,

X

Xinsheng Fang

Department of Basic Science and Technology Research, Taihu Laboratory of Deepsea Technological Science 2 , 214082 Wuxi,; National Key Laboratory on Ship Vibration and Noise, China Ship Scientific Research Center 3 , 214082 Wuxi,

X

Xuewen Yin

National Key Laboratory on Ship Vibration and Noise, China Ship Scientific Research Center 3 , 214082 Wuxi,

Y

Yan Li

School of Aerospace Engineering and Applied Mechanics, Tongji University 1 , 200092 Shanghai,

Y

Yongdong Pan

School of Aerospace Engineering and Applied Mechanics, Tongji University 1 , 200092 Shanghai,

Y

Yabin Jin

School of Aerospace Engineering and Applied Mechanics, Tongji University 1 , 200092 Shanghai,; 4 Shanghai Key Laboratory of Intelligent Sensing and Detection Technology, School of Mechanical and Power Engineering, East China University of Science and Technology, 200237 Shanghai, China

Funding

National Natural Science Foundation of China Award: 12272267

China Association for Science and Technology Award: 2021QNRC001

Tongji University Award: the Fundamental Research Funds for the Central Universities

Science and Technology Innovation Plan Of Shanghai Science and Technology Commission Award: 22JC1404100

Cite This Article

Xiao Pan, Xinsheng Fang, Xuewen Yin, et al. (2024). Gradient index metamaterials for broadband underwater sound absorption. APL Materials, 12(3). https://doi.org/10.1063/5.0190946

Gradient index metamaterials for broadband underwater sound absorption

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