Transactions of the Korean Society for Noise and Vibration Engineering (한국소음진동공학회논문집)

The Korean Society for Noise and Vibration Engineering (한국소음진동공학회)
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Evaluations of the Acoustics Characteristics of Cellulose Absorbers

셀룰로오즈 흡음재의 음향적 특성 평가

  • Received : 2012.03.14
  • Accepted : 2013.04.16
  • Published : 2013.05.20
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Abstract

Eco-friendly material applied to building would be one of the materials which is must developed for global environmental conservation and reduction of carbon dioxide. For development of eco-friendly material, a cellulose absorber has been developed with waste paper through adjustment of various mix proportions. The developed cellulose absorber has been tested for its acoustic properties such as absorption coefficient and dynamic stiffness. The absorption coefficient was evaluated by developing six samples and using impedance tube and reverberation chamber. As a result of the evaluation, 0.64(NRC) was secured in absorption coefficient and 4.7 $MN/m^3$ was indicated in dynamic stiffness. Also, for practical use of developed absorbers as inner heartwood in drywall, comparison test of sound reduction index was performed with existing glass wool absorbers and constructed drywall of gypsum board. The results have shown 55 dB(Rw) of sound reduction index in glass-wool wall and 46 dB(Rw) in cellulose.

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References

  1. Scott, R. A., 1946, The Absortion of Sound in a Homogeneous Porous Medium, Proc. Phys. Soc. London. Vol. 58. pp. 165-183. https://doi.org/10.1088/0959-5309/58/2/303
  2. Yaniv, S., 1973, Impedance Tube Measurement of the Propagation Constant and Characteristic Impedance of Porous Materials, J. Acoust. Soc. Am., Vol. 54, pp. 1138-1142. https://doi.org/10.1121/1.1914360
  3. Olynyk, D. and Northwood, T. D., 1964, Comparison of Reverberation-room and Impedance-tube Absorption Measurements, The Journal of the Acoustical Socity of America, Vol. 36, No. 11, pp. 2171-2174. https://doi.org/10.1121/1.1919339
  4. KS F 2805: 2004, Measurement of Sound Absorption in a Reverberation Room.
  5. Song, H. Y. and Lee, D. H., 2008, A Study on the Acoustic Absorption Performance of a Helmholtz Resonator, Transactions of the Korean Society for Noise and Vibration Engineering, Vol. 18, No. 1, pp. 71-79. https://doi.org/10.5050/KSNVN.2008.18.1.071
  6. KS F 2808: 2011, Laboratory Measurements of Airborne Sound Insulation of Building Elements.
  7. KS F 2862: 2002, Rating of Airborne Insulation in Buildings and of Building Elements.
  8. KS F 2868: 2003, Determination of Dynamic Stiffness of Materials Used Under Floating Floors in Dwellings.