Results 21 to 30 of about 1,666 (211)
Zhongguo Jianchuan Yanjiu, 2023 ObjectiveThis paper aims to study the characteristics and calculation method of the vibration and sound radiation of single ring-stiffened cylindrical shells with porous fiber composite materials installed in the inner wall under acoustic excitation ...
Xinmei YANG +3 more
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Utilization and Study of Raw Groundnut Shell as a Source of Sound Absorbing Material
Journal of Natural Fibers, 2022 Natural biodegradable materials have the potential of an alternative traditional sound-absorbing material. These materials have the advantages of low cost, light in weight, easily available, eco-friendly, and nonpolluting.
Ulhas A. Malawade +3 more
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Optimization of Sound Absorption Performance of OGFC Asphalt Mixture Based onAcoustic Parameters [PDF]
Zhengzhou Daxue xuebao. Gongxue banIn the phenomenological model, the sound absorption coefficient of porous materials was used to explaintakes into account the energy dissipation generated by the propagation of sound waves in the void structure.
WU Wenliang, LI Chenyue, DAI Shenglin
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Prediction of the Absorption Characteristics of Non-Uniform Acoustic Absorbers with Grazing Flow
Applied Sciences, 2023 In this paper, planar and the cylindrical broadband non-uniform acoustic absorbers were constructed, both of which use broadband absorption units (BAUs) as their building blocks.
Yang Ou, Yonghui Zhao
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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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An Integration Strategy for Acoustic Metamaterials to Achieve Absorption by Design
Applied Sciences, 2018 As much of metamaterials’ properties originate from resonances, the novel characteristics displayed by acoustic metamaterials are a narrow bandwidth and high dispersive in nature. However, for practical applications, broadband is often a necessity.
Min Yang, Ping Sheng
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Noise Reduction Potential of Cellular Metals
Metals, 2012 Rising numbers of flights and aircrafts cause increasing aircraft noise, resulting in the development of various approaches to change this trend. One approach is the application of metallic liners in the hot gas path of aero-engines.
Björn Hinze +2 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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Sensors, 2023 Reconstruction of the acoustic relaxation absorption curve is a powerful approach to ultrasonic gas sensing, but it requires knowledge of a series of ultrasonic absorptions at various frequencies around the effective relaxation frequency.
Kun Shen +4 more
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Journal of Aeronautical Materials, 2023 Acoustic liner is an important component to reduce engine noise. In this work, the modal sound source characteristics of the pipeline under different flow fields were calculated and used as the input boundary for the background flow field calculation and
YANG Zhiyong +7 more
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