Results 231 to 240 of about 22,711 (254)

Studies on sound absorption performance of porous materials at low temperature

The Journal of the Acoustical Society of America, 2019
The acoustical parameters of porous materials are usually tested at normal temperature. In recent years, spaces need acoustical treatments at low temperature spring up with the dynamic tendency of projects such as snow theme parks and high speed trains traveling in the frozen region.
Xiwei Wang, Xiang Yan, Hui Li, Xiaoyan Xue   +3 more
openaire   +1 more source

Improved low-frequency performance of a composite sound absorption coating

Journal of Vibration and Control, 2011
In order to improve the low-frequency acoustic performance, a composite sound absorption coating made by embedding another viscoelastic material into the viscoelastic substrate of the traditional sound absorption coating, has been developed. Compared to the substrate, the transverse wave speed of the embedded-layer is lower. Accounting for the symmetry,
Tao Meng, Hua Hong-Xing
openaire   +1 more source

The Design and Optimization of Nonwoven Composite Boards on Sound Absorption Performance

Applied Mechanics and Materials, 2013
This study aims to investigate the optimal value of design parameters for the sound-absorbing nonwoven composite board. The number of laminated layers and thickness of polyester fiber are viewed as the design parameters for fabricating the nonwoven composite board.
Chen Hung Huang, Yu Chun Chuang
openaire   +1 more source

The impact of the neck material on the sound absorption performance of Helmholtz resonators

Journal of Sound and Vibration, 2014
Abstract Helmholtz resonators with sound absorption materials filling the neck may have an improved sound absorption capacity. In this work, parallel perforated ceramics with different perforation diameters were installed into the neck of a Helmholtz resonator to improve its acoustic impedance to simultaneously achieve a better acoustic absorption ...
Dong Yang, Xiaolin Wang, Min Zhu
openaire   +1 more source

Sound absorption performance of corncob/hemp composite fabric material

Textile Research Journal
Agro-industrial waste corncob was used to develop a new thin corncob/hemp composite fabric (CHCF) material to improve the sound absorption performance of fiber materials. CHCF materials were prepared from agro-industrial waste corncob pellets and natural hemp fiber by spreading corncob pellets in hemp fiber webs, layering, and high-temperature ...
Yijun Zhu, Xiqian Ye, Juan Huang, Zhongmin Deng, Xueting Liu   +4 more
openaire   +1 more source

Enhancement of sound absorption performance of Helmholtz resonators by space division and chamber grouping

Applied Acoustics, 2023
Xinmin Shen, Cheng Shen
exaly  

Hierarchical pore structure based on cellulose nanofiber/melamine composite foam with enhanced sound absorption performance

Carbohydrate Polymers, 2021
Liwei Yan, Mei Liang, Haoruo Zhang
exaly  

Weight Minimization of Sound Packages by Balancing Absorption and Transmission Performance

2019
Generally, heavier noise control treatments are favored over lighter ones since heavier acoustical materials tend to insulate (block) noise sources more effectively than do lighter materials. In automotive applications, however, heavier materials cannot always be adopted because of concerns over the total weight of the vehicle. Thus, it would be useful
openaire   +1 more source

Experimental study on the sound absorption performance of surface-perforated mortar

Construction and Building Materials, 2021
Sukhoon Pyo, Sungwoo Park
exaly  

Simulating Acoustic Performance of Mycelium-Based Sound Absorption Panels

eCAADe proceedings, 2023
Natalie Walter, Benay Gürsoy
openaire   +1 more source