Results 21 to 30 of about 1,300 (175)

A hybrid acoustic structure for low-frequency and broadband underwater sound absorption

Journal of Low Frequency Noise, Vibration and Active Control, 2022
The underwater anechoic coating with local resonant units is an effective method to achieve low-frequency sound absorption. However, the structure obtained in this way is not satisfactory in the sound absorption effect of mid-high frequency bands ...
Xinyu Jia, Guoyong Jin, Kangkang Shi, Chunyang Bu, Tiangui Ye   +4 more
doaj   +1 more source

Highly efficient underwater acoustic absorber designed by filled-microperforated plate-like structure: Aging and life prediction

Polymer Testing, 2023
The underwater sound absorption material for submarines should fulfill the demand for remarkable performance in medium-low frequency sound absorption at low thicknesses.
Jingjing Nan, Lingjie Yu, Mingjuan Du, Jiaguang Meng, Zijing Dong, Menghe Miao, Chao Zhi   +6 more
doaj   +1 more source

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   +1 more source

Investigation of Parameters Affecting Underwater Communication Channel [PDF]

Журнал інженерних наук, 2020
Underwater communication has become a widely studied area in recent years and showed great potential to be an area of research. Acoustic communication is often preferred in underwater communication due to its suitability for an underwater diffusion ...
Aydin S., Onur T. O.
doaj   +1 more source

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   +1 more source

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   +1 more source

Marine Acoustic Zones of Australia

Journal of Marine Science and Engineering, 2021
Underwater sound is modelled and mapped for purposes ranging from localised environmental impact assessments of individual offshore developments to large-scale marine spatial planning.
Christine Erbe, David Peel, Joshua N. Smith, Renee P. Schoeman   +3 more
doaj   +1 more source

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   +1 more source

Study on Acoustic Characteristics and Mechanisms of Low-Frequency Broadband Sound-Absorbing Honeycomb Metastructures

Applied Sciences
To address the dual requirements of underwater low-frequency noise control, a multi-layer periodic composite underwater sound-absorbing material is designed.
Bowen Tian, Rongwu Xu, Wenwen Zhang, Jinwei Liu   +3 more
doaj   +1 more source

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   +1 more source