scholarly journals Sound transmission loss of hierarchically porous composites produced by hydrogel templating and viscous trapping techniques

2017 ◽  
Vol 1 (12) ◽  
pp. 2627-2637 ◽  
Author(s):  
Benjamin R. Thompson ◽  
Brogan L. Taylor ◽  
Qin Qin ◽  
Simeon D. Stoyanov ◽  
Tommy S. Horozov ◽  
...  
Keyword(s):  
Porous Materials ◽  
Pore Size ◽  
Transmission Loss ◽  
Sound Transmission ◽  
Sound Transmission Loss ◽  
Hierarchically Porous ◽  
Hierarchically Porous Materials ◽  
Porous Composites ◽  
Insulating Properties

We produced hierarchically porous materials using hydrogel templating and viscous trapping techniques and studied how their sound insulating properties depend on the pore size and porosity.

scholarly journals Analysis of the transmission loss of double-leaf panels with an equivalent spring–mass model for studs

2020 ◽  
Vol 37 ◽  
pp. 126-133
Author(s):  
Yuan-Wei Li ◽  
Chao-Nan Wang
Keyword(s):  
Distribution Curve ◽  
Transmission Loss ◽  
Sound Transmission ◽  
Experimental Results ◽  
Sound Insulation ◽  
Sound Transmission Loss ◽  
Mass Model ◽  
Steel Stud ◽  
Panel Thickness ◽  
Stiffness Distribution

Abstract The purpose of this study was to investigate the sound insulation of double-leaf panels. In practice, double-leaf panels require a stud between two surface panels. To simplify the analysis, a stud was modeled as a spring and mass. Studies have indicated that the stiffness of the equivalent spring is not a constant and varies with the frequency of sound. Therefore, a frequency-dependent stiffness curve was used to model the effect of the stud to analyze the sound insulation of a double-leaf panel. First, the sound transmission loss of a panel reported by Halliwell was used to fit the results of this study to determine the stiffness of the distribution curve. With this stiffness distribution of steel stud, some previous proposed panels are also analyzed and are compared to the experimental results in the literature. The agreement is good. Finally, the effects of parameters, such as the thickness and density of the panel, thickness of the stud and spacing of the stud, on the sound insulation of double-leaf panels were analyzed.

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