Due to numerous developments in most industries and the increase in the usage of massive and powerful machines in every field, noise has become an unavoidable part of mechanized life and has brought about serious health hazards. The main aim of this work was to investigate the usability of polyurethane and polyacrylonitrile nanofibers for improving sound insulation properties over a wide band of frequencies and reducing weight and thickness of conventional polyester and wool nonwovens. The effect of the number of nanofiber layers and associated surface densities on acoustic properties was investigated. Sound transmission loss and sound absorption analysis using the impedance tube method were carried out as the main factors affecting acoustic behavior of samples. The results show that incorporation of nanofiber layers in nonwoven materials can improve both sound absorption and sound transmission loss simultaneously, especially in mid and lower frequencies, which are difficult to detect by conventional materials.
IngardU., “Noise reduction analysis”, Jones and Bartlett Publishers“, 2009.
2.
SagartzazuX., Hervella-NietoL., PagaldayJ.M., “Review in sound absorbing materials”, Archives of Computational Methods in Engineering, 15(3), 2008, pp. 311–342.
3.
ShishooR., “Textile advances in the automotive industry”, CRC Press, 2008.
4.
RamisJ., AlbaJ., ReyR.D., “An inverse method to characterize fibrous sound absorbing materials”, Journal of the Acoustical Society of America, 128(4), 2010, pp. 2366–2366.
5.
TascanM., VaughnE. A., “Effects of fiber denier, fiber cross-sectional shape and fabric density on acoustical behavior of vertically lapped nonwoven fabrics”, Journal of Engineered Fibers and Fabrics, 3(2), 2008, pp. 32–38.
6.
GourdonE., JaouenL., “Analytical microstructural model for acoustical porous materials with single or double porosity, Journal of the Acoustical Society of America, 123(5), 2008, pp. 3036–3036.
7.
YilmazN.D., LeeP.B., PowellN.B., MichielsenS., “Effects of porosity, fiber size, and layering sequence on sound absorption performance of needle-punched nonwovens”, Journal of Applied Polymer Science, 121(5), 2011, pp. 3055–3069.
8.
TascanM., GaffneyK. L., “Effect of glass-beads on sound insulation properties of nonwoven fabrics”, Journal of Engineered Fibers and Fabrics, 7(1), 2012, pp. 101–105.
9.
TascanM., VaughnE.A., “Effects of total surface area and fabric density on the acoustical behavior of needle punched nonwoven fabrics”, Textile Research Journal, 78(4), 2008, pp. 289–296.
10.
WangX., PengF., ChangB., “Sound absorption of porous metals at high sound pressure levels,”Journal of the Acoustical Society of America, 126(2), 2009, pp. EL55–EL61.
11.
JiangS., XuY., ZhangH., Branford-WhiteC., YanX., “Seven-hole hollow polyester fibers as reinforcement in sound absorption chlorinated polyethylene composites”, Applied Acoustics, 73(3), 2012, pp. 243–247.
12.
KinoN., UenoT., “Evaluation of acoustical and non-acoustical properties of sound absorbing materials made of polyester fibers of various cross-sectional shapes”, Applied Acoustics, 69(7), 2008, pp. 575–582.
13.
ChenY., JiangN., “Carbonized and activated nonwovens as high-performance acoustic materials: Part I noise absorption”, Textile Research Journal, 77(10), 2007, pp. 785–791.
14.
ChenY., JiangN., “Carbonized and activated nonwovens as high-performance acoustic materials: Part II noise insulation”, Textile Research Journal, 79(3), 2009, pp. 213–218.
15.
HuangZ.M., ZhangY.Z., KotakiM., RamakrishnaS., “A review on polymer nanofibers by electrospinning and their applications in nanocomposites”, Composite Science and Technology, 63(15), 2003, pp. 2223–2253.
16.
LuohR., HahnH.T., “Electrospun nanocomposite fiber mats as gas sensors”, Composite Science and Technology, 66(14), 2006, pp. 2436–2441.
17.
AsmatuluR., KhanW., YildirimM.B., “Acoustical properties of electrospun nanofibers for aircraft interior noise reduction”, Proceedings of the ASME, International Mechanical Engineering Congress & Exposition. Florida, 2009.
18.
KalinovaK., MikolandaT., “Resonance of acoustic multi-membrane system”, Fibers and Textiles, 16(4), 2009, pp. 18–28.
19.
DemirA., TascanM., GumusT.; “Drastic decrease in weight via better noise insulation”, TUT Textiles a Usages Techniques, 5(71), 2009, pp. 34–38.
20.
XiangH., TanS., YuX., LongY., ZhangX., ZhaoN., XuJ., “Sound absorption behavior of electrospun polyacrylonitrile nanofibrous membranes”, Chinese Journal of Polymer Science, 29(6), 2011, pp. 650–657.
RabbiA., “Studies on the behavior of sound absorption of wool and polyester nonwoven PU and PAN nanofibers composites”, MSc. Thesis, AmirKabir University of Technology, 2011.
