Journal of the Korean Wood Science and Technology

The Korean Society of Wood Science & Technology (한국목재공학회)
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Changes in Sound Absorption Capability and Air Permeability of Malas (Homalium foetidum) Specimens after High Temperature Heat Treatment

  • Kang, Chun-Won (Department of Housing Environmental Design, and Research Institute of Human Ecology, Chonbuk National University) ;
  • Li, Chengyuan (Department of Wood Science and Engineering, Beihua University) ;
  • Jang, Eun-Suk (Department of Housing Environmental Design, and Research Institute of Human Ecology, Chonbuk National University) ;
  • Jang, Sang-Sik (Department of Bio-based Materials, Chungnam National University) ;
  • Kang, Ho-Yang (Department of Bio-based Materials, Chungnam National University)
  • Received : 2018.01.29
  • Accepted : 2018.03.08
  • Published : 2018.03.25
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Abstract

The changes in sound absorption capability and air permeability of Malas wood after high temperature heat treatment were investigated. The average air permeability of Malas in longitudinal direction after heated under the temperature of $190^{\circ}C$ during 3 hours was about 23.48 darcys and that of control was about 3.11 darcys. The noise reduction coefficients of Malas specimens were 17% for treatment and 10% for control. The means of sound absorption coefficient of specimens in the frequency range of 50~6,400 Hz were 42% for treatment and 17% for control, respectively.

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References

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