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Studies on the sound absorption and transmission loss performances of wood-based, natural and wastematerials

Acta Mechanica Sinica 2021年第5期37卷 861-873,I0003页

作者： Hsiao Mun Lee Wensheng Luo Jinlong Xie Guilin Wen Heow Pueh Lee Center for Research on Leading Technology of Special Equipment School of Mechanical and Electrical EngineeringGuangzhou UniversityGuangzhou 510006China School of Mechanical and Electrical Engineering Guangzhou UniversityGuangzhou 510006China Department of Mechanical Engineering National University of SingaporeSingapore 117575Singapore

The sound absorption and sound transmission loss performances of the natural woods,hard and soft processed woods with attachment of the various natural orwastematerials were investigated in the present study using impedance tube with American Society for Testing material(ASTM)*** sound absorption performances of all natural and all hard processed woods were very *** was found that filter mat made by the coconut fibre was the best material for sound absorption improvement of the hard processed *** sound absorption performance of the soft processed wood(cork)was better than all natural and all hard processed *** all tested woods,it was found that the cork with attached tea bag made by corn fibre is the best selection for sound absorption *** transmission loss performances of all natural woods were *** effects of various materials on the transmission loss performances of all hard processed woods were not very *** cork with and without attachment of various materials,their transmission loss performances were not as good as the hard processed *** all tested woods,it was found that Pterocarpus soyauxii and Quercus spp.(natural woods)are the best woods to be used in those applications when prevention of sound transmission is *** is recommended that cork is the best wood to be used in those applications where sound absorption and prevention of sound transmission are needed at the same time due to its good sound absorption performance while its ability on prevention of the sound transmission is also acceptable.

关键词： Sound absorption Transmission loss Wood-based material natural material Waste material

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Au@Ag nanoparticles deposited on the nacre structure of mussel shell as naturally SERS substrates

Au@Ag nanoparticles deposited on the nacre structure of muss...

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第十九届全国光散射学术会议

作者： Kaisong Yuan Xinjie Guo Jingyi Jian Zhengjin Jiang Haibo Zhou Institute of Pharmaceutical Analysis College of Pharmacy Jinan University

＜正＞In this work,we provided a SERS substrate through utilizing the nacre structure of mussel shell as a platform for the deposition of Au@Ag nanoparticles（NPs）.The natural periodicity of the grating structure fro... 详细信息

关键词： Mussel shell natural material grating structure surface enhanced Raman scattering bacterial

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