Results 11 to 20 of about 1,533 (215)

Underwater sound absorption characteristics of the acoustic metamaterials with multiple coupling substructure

Journal of Low Frequency Noise, Vibration and Active Control
The lateral plates are usually used in the field of structural design of acoustic metamaterials (AMs), which can realize the control of AMs on sound waves. Presently, researches on the application of AMs with lateral plates mainly focus on the regulation
Kangkang Shi, Dongsheng Li, Dongsen Hu, Xiaoli Yu, Canlong Ding, Guoyong Jin   +5 more
doaj   +3 more sources

A New Multi-Mechanism Synergistic Acoustic Structure for Underwater Low-Frequency and Broadband Sound Absorption

Journal of Marine Science and Engineering, 2023
The acoustic absorption characteristics of anechoic coatings attached to the surface of underwater vehicles are closely related to their acoustic stealth.
Kangkang Shi, Dongsheng Li, Dongsen Hu, Qi Shen, Guoyong Jin   +4 more
doaj   +2 more sources

Development of polymer-based nanocomposites for underwater sound absorption

, 2021
Underwater sound can have a detrimental effect on marine animals due to the ever-increasing noise levels in their pristine habitat. It has also been commonly used to detect underwater floating objects via a sonar system. To absorb unwanted underwater sound, polymers (e.g., rubber), which have similar impedance to that of water, are widely used for ...
Fu, Yifeng
openaire   +4 more sources

Design and Simulation Analysis of Sound Absorption Structure for Acoustic Detection-Based Underwater Gliders

水下无人系统学报
The radiation noise of mechanical noise has a significant impact on the acoustic detection performance of acoustic detection-based underwater gliders. In order to address this problem, this paper introduced sound absorption structure into the study of ...
Donghai ZENG, Xinyu WU, Chang YUAN, Yuxuan PENG, Jianxing ZHANG, Baoren LI   +5 more
doaj   +2 more sources

Study on the Low-Frequency and Broadband Sound Absorption Performance of an Underwater Anechoic Layer with Novel Design

Journal of Marine Science and Engineering, 2023
To further improve the low-frequency broadband sound absorption capability of the underwater anechoic layer (UAL) on the surface of marine equipment, a novel sound absorption structure with cavities (NSSC) is designed by adding resonators and honeycombs ...
Jinshun Hu, Yongshui Lin, Zhiwei Zhou, Xiaofei Cao, Qingjia Chi, Weiguo Wu   +5 more
doaj   +2 more sources

Underwater sound absorption performance of acoustic metamaterials with multilayered locally resonant scatterers

Results in Physics, 2019
Although the conventional locally resonant acoustic metamaterials (LRAMs) have shown better sound absorption performance in the low frequency band, the effective frequency range of the sound absorption performance is quite narrow relatively.
Kangkang Shi, Guoyong Jin, Ruijie Liu, Tiangui Ye, Yaqiang Xue   +4 more
doaj   +2 more sources

Analysis of Sound Absorption Performance of Underwater Acoustic Coating considering Different Poisson’s Ratio Values

Shock and Vibration, 2021
Viscoelastic material acoustic coating plays an important role in noise and vibration control of underwater equipment. The dynamic mechanical properties of the viscoelastic material have a direct effect on the sound absorption performance of the acoustic
Zhuhui Luo, Tao Li, Yuanwei Yan, Zhou Zhou   +3 more
doaj   +2 more sources

Global Sound Absorption Prediction for a Composite Coating Laid on an Underwater Submersible in Debonding States

Journal of Marine Science and Engineering, 2023
To address the problem that anechoic coatings frequently fall off from modern submersible hulls and are detrimental to the realization of underwater acoustic stealth, this paper focuses on the broadband sound absorbing of acoustic coverings in debonding ...
Zhifu Zhang, Yizhe Huang, Jiaxuan Wang, Zhuang Li, Shiyuan Zhang, Xirui Zhang   +5 more
doaj   +2 more sources

Finite Element Solution for Dynamic Mechanical Parameter Influence on Underwater Sound Absorption of Polyurethane-Based Composite. [PDF]

Int J Mol Sci, 2022
Underwater noise pollution, mainly emitted by shipping and ocean infrastructure development of human activities, has produced severe environmental impacts on marine species and seabed habitats.
Yin D, Liu Y, Wang Y, Gao Y, Hu S, Liu L, Zhao X.   +6 more
europepmc   +2 more sources

Ultra‐broadband sound absorption characteristics in underwater ultra‐thin metamaterial with three layer bubbles

Engineering Reports
The interest of this article is to obtain the underwater broadband sound absorption characteristics by filling three layers of bubbles in Polydimethylsiloxane polymer (PDMS).
Nansha Gao, Qiaogao Huang, Guang Pan
doaj   +2 more sources