JOURNAL BROWSE
Search
Advanced SearchSearch Tips
A Study on the Acoustic Characteristics and Absorption Performance Improvement Method of Double Layered Sound Absorption System Using High Density Polyester Absorbing Materials
facebook(new window)  Pirnt(new window) E-mail(new window) Excel Download
 Title & Authors
A Study on the Acoustic Characteristics and Absorption Performance Improvement Method of Double Layered Sound Absorption System Using High Density Polyester Absorbing Materials
Yoon, Je-Won; Jang, Kang-Seok; Cho, Yong-Thung;
  PDF(new window)
 Abstract
To improve the acoustic performance of sound absorbing materials, the thickness of the material should be increased or the sound absorbing material having an irregular surface shape should be used. In this study, the acoustic characteristics and methods to improve the acoustic performance of a sound absorbing system equipped with double layered polyester sound absorbing materials were investigated. The numerical model was set up and the results obtained from the model were compared with the actual measurement data. And, strategies to improve the acoustic performance of sound absorbing systems with double layered sound absorbing materials made of polyester with different configuration were shown. So, this study is expected to be usefully used at sites that require high acoustic absorption performance with minimal installation thickness to reduce sounds reflection in narrow spaces such as interior of subway tunnels or in noise barriers installed adjacent to rails.
 Keywords
Characteristic Impedance;Propagation Constant;Airflow Resistivity;Impedance Tube;Four Pole Parameter;
 Language
Korean
 Cited by
 References
1.
Lee, D. H. and Seo, S. W., 2005, A Study on the Improvement of Acoustic Absorption of Multiple Layer Perforated Panel Systems, Transactions of the Korean Society for Noise and Vibration Engineering, Vol. 15, No. 5, pp. 571~577. crossref(new window)

2.
Lee, F. C. and Chen, W. H., 2001, Acoustic Transmission Analysis of Multi-layer Absorbers, Journal of Sound and Vibration, Vol. 248, No. 4, pp. 621~634. crossref(new window)

3.
Liu, X., Liu, J. and Su, X., 2012, Simulation Model for the Absorption Coefficients of Double Layered Nonwovens, Fibres and Textiles in Eastern Europe, Vol, 20, No. 4(93), pp. 102~107.

4.
Delany, M. E. and Bazley, E. N., 1970, Acoustical Properties of Fibrous Absorbent Materials, Applied Acoustics, Vol. 3, pp. 105~116. crossref(new window)

5.
Garai, M. and Pompoli, F., 2005, A Simple Empirical Model of Polyester Fibre Materials for Acoustical Applications, Applied Acoustics, Vol. 66, pp. 1383~1398. crossref(new window)

6.
Munjal, M. L., 2014, Acoustics of Ducts and Mufflers, John Wiley & Sons, Inc., New York.

7.
Utsuno, H., Tanaka, T., Fujikawa, T. and Seybert, A. F., 1989, Transfer Function Method for Measuring Characteristic Impedance and Propagation Constant of Porous Materials, J. Acoust. Soc. Am., Vol. 86, No. 2, pp. 637~643. crossref(new window)

8.
KS F 2805, Measurement of Sound Absorption in a Reverberation Room.