Results 11 to 20 of about 19,183 (214)
Gradient index metamaterials for broadband underwater sound absorption
APL MaterialsThe 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.
Xiao Pan +5 more
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Physical Bounds on Underwater Sound Absorption by Coatings
AcousticsThe development of sound-absorbing coatings for underwater structures has attracted significant attention due to their critical role in stealth and noise mitigation. While much of the recent research has focused on novel materials and complex configurations, the present study adopts a fundamentally different approach by establishing theoretical bounds ...
James McDaniel +3 more
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Journal of Low Frequency Noise, Vibration and Active ControlThe 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 of sound waves in air media, and rarely involve the research on their underwater acoustic ...
Kangkang Shi +5 more
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Frontiers in Mechanical Engineering, 2021 Underwater acoustic wave absorption and control play an important role in underwater applications. Various types of underwater acoustic metamaterials have been proposed in recent years with the vigorous development of acoustic metamaterials.
Junyi Wang, Jiaming Hu, Yun Chen
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A review of underwater acoustic metamaterials for underwater acoustic equipment
Frontiers in Physics, 2022 Researchers use underwater acoustic equipment to explore the unknown ocean environment, which is one of the important means to understand and utilize the ocean.
Zhenjing Zhu +17 more
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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 +4 more
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Ultrathin acoustic metamaterial as super absorber for broadband low-frequency underwater sound
Scientific Reports, 2023 In this work, an ultrathin acoustic metamaterial formed by space-coiled water channels with a rubber coating is proposed for underwater sound absorption. The proposed metamaterial achieves perfect sound absorption ( $$\alpha$$ α > 0.99) at 181 Hz, which
Xindong Zhou +2 more
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AIP Advances, 2023 We proposed an acoustic metamaterial with deep subwavelength thickness for low-frequency underwater sound absorption. The proposed hybrid metamaterial has a perforated facesheet, a fluid-filled square honeycomb core with inside rubber coating, and a ...
Mingyu Duan +3 more
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Zhongguo Jianchuan Yanjiu, 2022 ObjectivesAn underwater anechoic coating layer laid on the hull surface of a submarine is squeezed under the action of high hydrostatic pressure, changing its shape and material parameters, which has a great impact on sound absorption performance ...
Wenkai DONG, Meixia CHEN
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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 +4 more
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