Browse > Article
http://dx.doi.org/10.12772/TSE.2018.55.338

Sound Absorption Characteristics of Porous Fibrous Materials with Different Density Distributions  

Na, Hae Joong (Industry Academic Cooperation Foundation, Dongyang University)
Lee, Kyoung Min (Gyeongbuk Technopark)
Kim, Kyoung Do (GH Advanced Materials Inc.)
Chun, Du Hwan (Department of Fiber System Engineering, Yeungnam University)
Publication Information
Textile Science and Engineering / v.55, no.5, 2018 , pp. 338-342 More about this Journal
Abstract
To improve the acoustic performance of porous fibrous materials, the material thickness should be increased or nonwoven fabrics with a double layered-system should be used as described in the previous paper [2]. In this study, the sound absorption characteristics of nonwoven fabrics with double-layered and triple-layered systems and different density distributions were investigated using an impedance-tube method. In the case of a double-layered system, the results show that a higher face material density increased the sound absorption coefficient in the middle-frequency region. In case of a triple-layered system, when combined with three kinds of materials, under the same condition of face material, a greater density difference with nonwoven in the back resulted in an increased sound absorption coefficient in the middle-frequency region.
Keywords
porous fibrous material; porosity; solidity; sound absorption coefficient; thickness; density distribution; double layered system; triple layered system;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
연도 인용수 순위
1 S. W. Heo, W. Kim, D. H. Lee, and Y. P. Kwon, "A Study on the Sound Absorption of Multiple Layer Perforated Plate Systems Combined with Porous Absorbing Materials", pp.896-901, KSNVE Annual Autumn Conference, 2002.
2 H. J. Chang and D. H. Chun, "Experimental Study to Determine Sound Absorption Factors of Fiber Assemblies with Membrane Structure", J. Korean Fiber Soc., 2004, 41, 285-290.
3 K. M. Lee, D. H. Chun, and S. H. Chun, "Sound Absorption Characteristics Based on the Woven Fabric Density and Position Variations", Text. Sci. Eng., 2015, 52, 193-198.   DOI
4 K. M. Lee, "A Study on Sound Absorption Characteristic of Fiber Assemblies for Pore Size and Structural Change", M.S. Thesis, Yeungnam Univ., 2013.
5 J. W. Lee, S. N. Lee, J. H. Shim, P. K. Jung, W. K. Lee, and B. J. Bang, "The Study on Improvement of Acoustic Performance for Automobile Sound-absorbing Materials Using Hollow Fiber", Korean Soc. Noise Vib. Eng., 2011, 21, 850-857.   DOI
6 KS F 2814-2, "Determination of Sound Absorption Coefficient and Impedance in Impedance Tubes : Part 2 Transfer Function Method", 2002.
7 Y. E. Lee and C. W. Joo, "Theoretical Modeling and Experimental Fitness on Sound Absorption Characteristics of Nonwoven Fabrics", Text. Sci. Eng., 2005, 42, 83-390.
8 J. F. Allard, A. A. Knine, and C. Depollier, "Acoustical Properties of Partially Reticulated Forms with High and Medium Flow Resistance", J. Acoust. Soc. Am., 1987, 79, 1734-1740.
9 J. W. Yoon, K. S. Jang, and Y. T. Cho, "A Study on the Acoustic Characteristics and Absorption Performance Improvement Method of Double Layered Sound Absorption System Using High Density Polyester Absorbing Materials", Korean Soc. Noise Vib. Eng., 2016, 26, 331-339.   DOI
10 D. H. Lee and S. W. Seo, "A Study on the Improvement of Acoustic Absorption of Multiple Layer Perforated Panel Systems", Trans. Korean Soc. Noise Vib. Eng., 2005, 15, 571-577.   DOI
11 X. Liu, J. Liu, and X. Su, "Simulation Model for the Absorption Coefficients of Double Layered Nonwovens", Fibres Text. East. Eur., 2012, 20, 102-107.
12 E. I. Kim, J. S. Lee, Y. Y. Kim, J. S. Kim, and Y. J. Kang, "Onedimensional Topology Optimization for Transmission Loss Maximization of Multi-layered Acoustic Foams", KSNVE Annual Conference, 2006.