Results 21 to 30 of about 2,485,601 (152)
Perfect acoustic absorption of Helmholtz resonators via tapered necks
Applied Physics Express, 2022 A neck tapered Helmholtz resonator possessing brilliant sound absorption in low-frequency is designed and demonstrated in this work. The strategy offers an extra geometrical degree of freedom, which will benefit perfect absorption.
Chao Song +7 more
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Investigation of the Acoustic Performance of Bagasse
Journal of Materials Research and Technology, 2020 Bagasse from sugar cane waste is an important agriculture waste and the byproduct of the sugar industry. Generally, bagasse is used as a fuel for many industries which causes environmental pollution while it can be used as a good sound-absorbing material.
Ulhas Arun Malawade, M.G. Jadhav
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Going Beyond the Causal Limit in Acoustic Absorption
Physical Review Applied, 2021 Dictated by the causality constraint, the existence of a minimum absorber thickness has set an almost insurmountable obstacle for the remediation of ultralow-frequency noise in the tens of Hz to 150 Hz regime, owing to the very large absorber thickness ...
Ho Yiu Mak +5 more
semanticscholar +1 more source
Low-frequency sound absorption performance of composite acoustic metamaterials with rotational labyrinth channels and micro-perforated panels [PDF]
AIP AdvancesIn this paper, a kind of novel acoustic metamaterial combined with a rotational labyrinth and a micro-perforated plate is designed. The design of the rotational labyrinth structure combined with micro-perforated plates endows the acoustic metamaterial ...
Xinxin Liu +4 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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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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, 2021 The present paper investigates absorption of a metamaterial panel composed of a flexible micro-perforated panel attached periodically with local resonators.
Honggang Zhao +5 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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