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Sound absorption characteristics of nanofibre web coated foams

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Title Sound absorption characteristics of nanofibre web coated foams
 
Creator Tetik, Gamze D
Yilmaz, Fulya
Celep, Gizem
 
Subject Electrospinning
Nanofibres
Noise reduction coefficient
Polyamide 6
Sound absorption
Sound absorption coefficient
 
Description 334-343
Sound absorption properties of polyamide 6 (PA6) nanofibre webs and a widely used sound absorption foam coated with
nanofibre webs have been investigated. Initial studies have focused on the electrospinning by using PA6 polymer to obtain
uniform and bead-free nanofibres. Thereafter, nanofibres are electrospun on an absorption foam through two spinning durations
of 10 h and 20 h. Thicknesses, mass per unit area values, porosities, pore sizes, and Brunauer-Emmet-Teller surface areas of the
webs are determined. At characterization stage, sound absorption coefficients of pure nanofibre webs, pure foam, and foams
enhanced with nanofibre webs are measured by acoustic impedance tube method. Noise reduction coefficients (NRC) are also
calculated. Sound absorption coefficients at 6400 Hz are observed as 0.76 and 0.74 for nanofibre webs electrospun during 10 h
and 20 h respectively. The NRC values are found as 0.189, 0.197 and 0.192 for pure foam sample and nanofibre webs
electrospun during 10 h and 20 h respectively. Overall results of the study indicate that moderate mid-high frequency sound
absorption and noise reduction coefficients are obtained by using the nanofibre web coated foams.
 
Date 2022-09-05T09:01:49Z
2022-09-05T09:01:49Z
2022-09
 
Type Article
 
Identifier 0971-0426 (Print); 0975-1025 (Online)
http://nopr.niscpr.res.in/handle/123456789/60473
https://doi.org/10.56042/ijftr.v47i3.45651
 
Language en
 
Publisher NIScPR-CSIR,India
 
Source IJFTR Vol.47(3) [Sep 2022]