Results 61 to 70 of about 2,485,601 (152)

Effect of silica aerogel on thermal insulation and acoustic absorption of geopolymer foam composites: The role of aerogel particle size

Composites Part B: Engineering, 2022
Y.X. Chen, K. Klima, H. Brouwers, Q. Yu
semanticscholar   +1 more source

On-demand prediction of low-frequency average sound absorption coefficient of underwater coating using machine learning

Results in Engineering
This study proposes an underwater coating with sound absorption ability in the middle-to-low frequency range and establishes an acoustic theoretical model combining the equivalent medium theory and the transfer matrix method.
Nansha Gao, Mou Wang, Xiao Liang, Guang Pan   +3 more
doaj   +1 more source

The effect of the combination of multiple woven fabric and nonwoven on acoustic absorption

Journal of Industrial Textiles, 2019
Textile materials can be used as acoustic materials. In this study, the acoustic absorption coefficient of multilayer fabrics with 60 ends/cm and 15, 30, 45, and 60 picks/cm is measured when the fabric is added as a resistive layer on top of a polyester ...
Pilar Segura-Alcaraz, Jorge Segura-Alcaraz, I. Montava, M. Bonet-Aracil   +3 more
semanticscholar   +1 more source

Potential Application of Fibers Extracted from Recycled Maple Leaf Waste in Broadband Sound Absorption

Buildings
To address environmental pollution issues and optimize the utilization of waste biomass resources, this study proposes a novel eco-friendly sound-absorbing material based on maple leaf waste and tests its sound absorption performance.
Jie Jin, Yecheng Feng, Haipeng Hao, Yunle Cao, Zhuqing Zhang   +4 more
doaj   +1 more source

Measurement of the Acoustic Absorption Coefficient by Impedance Tube

Research Papers Faculty of Materials Science and Technology Slovak University of Technology, 2019
The contribution deals with measurement of acoustic absorption coefficient for different single or double-layer materials: cork, two layers of polyethylene, polyethylene and felt. The measurement was performed on an impedance tube of our own construction,
E. Labašová, R. Ďuriš
semanticscholar   +1 more source

An efficient approach for broadband sound absorption using periodic multi-layer solid inclusions in acoustic coatings.

PLoS ONE
Anechoic coatings are of significance for enhancing the acoustic stealth of underwater equipment. Acoustic coatings with multi-layers of periodic solid inclusions are proposed and investigated for broadband sound absorption. Firstly, an analysis model is
Xiaogang Li, Peng Liu, Xilong Zhang, Xiaoyang Zhu, Hongbo Zhang   +4 more
doaj   +1 more source

Broadband Low-Frequency Sound Absorption Enabled by a Rubber-Based Ni₅₀Ti₅₀ Alloy Multilayer Acoustic Coating

Journal of Marine Science and Engineering
Acoustic coatings play a vital role in enhancing the acoustic stealth of underwater structures across the full depth range and, especially, in the low-frequency band.
Yizhe Huang, Ziyi Liu, Qiyuan Fan, Huizhen Zhang, Bin Huang, Qibai Huang, Zhifu Zhang   +6 more
doaj   +1 more source

Shaping Glass for Acoustic Performance

Challenging Glass Conference Proceedings, 2022
 Long Range is an experimental acoustic surface comprising 64 hexagonal, slumped glass panes, arranged in two layers of 32 panels each. It exhibits gradients of acoustic behaviors including reflection, diffusion, absorption, and transmission, accessed ...
Catie Newell, Zackery Belanger, Wes McGee   +2 more
doaj  

Analysis of the Influence of Thickness and Density on Acoustic Absorption of Materials Made from Used Cigarette Butts. [PDF]

Materials (Basel), 2021
Gómez Escobar V, Moreno González C, Rey Gozalo G.   +2 more
europepmc   +1 more source

Sensitivity Analysis of Acoustic Parameters in a Theatre Hall: A Case Study of the Maria Zankovetska Theatre in Lviv

Archives of Acoustics
This article explores the potential for modifying acoustic parameters within a theatre hall, using the Maria Zankovetska Theatre in Lviv, as a case study.
Jarosław RUBACHA, Adam PILCH, Roman KINASZ, Wojciech BINEK, Tadeusz KAMISIŃSKI, Mykhaylo MELNYK   +5 more
doaj   +1 more source