Results 51 to 60 of about 2,523,561 (213)

Some considerations on the use of space sound absorbers with next-generation materials reflecting COVID situations in Japan: additional sound absorption for post-pandemic challenges in indoor acoustic environments [PDF]

, 2020
Kimihiro Sakagami, Takeshi Okuzono
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Improving Sound Absorption Property of Polyurethane Foams by Adding Tea-Leaf Fibers

Archives of Acoustics, 2013
The sound absorption property of polyurethane (PU) foams loaded with natural tea-leaf fibers and luffa cylindrica (LC) has been studied. The results show a significant improvement in the sound absorption property parallel to an increase in the amount ...
Bulent EKICI, Aykut KENTLI, Haluk KUCUK
doaj  

Study on the sound absorption characteristics and noise reduction mechanism of coconut-shell-activated carbon particles and coconut fiber composite biomass sound-absorption materials

Materials Research Express
Sound-absorbing materials are widely used in the field of automotive industry. Biomass materials are abundant in the nature, some of which have natural sound absorption and noise reduction properties.
Zhenhua Hou, Xiaoying Ma, Liai Pan, Rui Zhang, Libo Wang   +4 more
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Influences of Compression Ratios on Sound Absorption Performance of Porous Nickel–Iron Alloy

Metals, 2018
The improvement of sound absorption performance of porous metal is a focus of research in the field of noise reduction. Influences of compression ratios on sound absorption performance of a porous nickel–iron (Ni–Fe) alloy were investigated.
Panfeng Bai, Xinmin Shen, Xiaonan Zhang, Xiaocui Yang, Qin Yin, Anxin Liu   +5 more
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Natural Fiber Airlaid Nonwoven Panels for Sound Absorption: Measurement and Prediction

, 2023
Mélek Ayadi, Nicolas Dauchez, Riadh Zouari, César Segovia, Ayda Baffoun, Slah Msahli, Nicolas Brosse   +6 more
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Design and Compare Sound Absorption Coefficient Nanocomposites Containing Tea Waste and Polypropylene With and Without Nanoclay

بهداشت و ایمنی کار, 2021
Introduction: In recent years tend to use of natural fibers has increased in making sound absorbers. Fiber-based natural materials have low density, low production costs, and are biodegradable.
Reza Jafari Nodoushan, Mostafa Azimzadeh, Sahar Bagheri, Arefeh Dehghani Tafti   +3 more
doaj  

Application Progress of Resonance Sound Absorption Structure in Aero Engines

Hangkong gongcheng jinzhan, 2019
Resonance sound absorption structure is a sandwich structure composed of perforated panel, honeycomb and rigid backplane. This structure is widely used in aircraft engine nacelle and has achieved good noise reduction effect.
Ji Shuangying, Hao Wei, Liu Jie
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Electrospinning nanofilms to improve sound absorption of flexible or rigid porous material

Results in Engineering
To further enhance the sound absorption capabilities of porous materials, we employed electrospinning technology to prepare electrospinning nanofilms using polyvinyl butyral solution.
Nansha Gao, Zhicheng Zhang, Jiacheng Guo, Zhenhua Wang, Xiao Liang, Guang Pan   +5 more
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Sound Absorption Properties of Shredded Paper Wastes as Indoor Building Sound Absorber

BioResources
The sound absorption properties of shredded paper wastes (SPW) were evaluated. Two impedance tubes (large and small) were used to measure the sound absorption coefficient of different thicknesses of SPW sound-absorber (20, 40, 60, 80, and 100 mm). As the
Eun-Suk Jang, Hee-Jun Park
doaj  

Design of multi-layered porous fibrous metals for optimal sound absorption in the low frequency range

Theoretical and Applied Mechanics Letters, 2016
We present a design method for calculating and optimizing sound absorption coefficient of multi-layered porous fibrous metals (PFM) in the low frequency range.
Wenjiong Chen, Shutian Liu, Liyong Tong, Sheng Li   +3 more
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