Journal of the Korean Wood Science and Technology

The Korean Society of Wood Science & Technology (한국목재공학회)
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Sound Absorption Capability and Anatomical Features of Highly Sound Absorptive Wood

고흡음성 목재의 흡음성능과 구조적 특징

  • Kang, Chun-Won (Department of Housing Environmental Design, and Research Institute of Human Ecology, College of Human Ecology, Chonbuk National University) ;
  • Kang, Wook (Department of Wood Science and Engineering, College of Agriculture and Life Science, Chonnam National University) ;
  • Kim, Gwang-Chul (Department of Housing Environmental Design, and Research Institute of Human Ecology, College of Human Ecology, Chonbuk National University)
  • 강춘원 (전북대학교 생활과학대학 주거환경학과, 전북대학교 인간생활과학연구소) ;
  • 강욱 (전남대학교 농업생명과학대학 임산공학과) ;
  • 김광철 (전북대학교 생활과학대학 주거환경학과, 전북대학교 인간생활과학연구소)
  • Received : 2010.04.21
  • Accepted : 2010.05.12
  • Published : 2010.07.25
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Abstract

Sound absorption capability and anatomical features of kagikazura (Uncaria rhynchophylla) and larch (lalix kaemferi) wood were estimated. Sound absorption coefficients had been measured by the two microphone transfer function method and anatomical features of kagikazura wood examined by SEM observation. The sound absorption coefficients of Uncaria rhynchophylla was higher than lalix kaemferi. Especially, in the frequency range of 1 to 4KHz, sound absorption coefficients of kagikazura was about 2~3 times higher than those of lalix kaemferi. Abundant and big vessel observed on the cross sectional surface of kagikazura wood and simple perforation plate observed on the longitudinal surface. It was surmised that the abundant big vessel element and simple perforation plate behaved as a sound absorbing pore.

일본산 산공재 중 구조적 특징이 목재흡음에 적합하다고 사료되는 카기카즈라목재의 흡음성능과 구조적 특징을 관찰하고자 목재횡단방향으로 원반형시험편을 채취하여 구조적 특징을 관찰하고, 전달함수법으로 흡음율을 측정하였다. 측정주파수범위에서 카기카즈라 횡단면의 흡음율은 0.30에서 0.50의 수치를 나타내었다. 비교수종인 낙엽송시험편보다 2~3배 높은 흡음율을 나타내었으며, 특히 2~4 KHz의 주파수영역에서는 50% 전후로 높은 흡음율을 나타내었다. 카기카즈라목재의 횡단면에서는 다수의 커다란 도관이 존재하고 이들 도관요소들은 단일천공판으로 연결되어 다공질형흡음에 유용한 연속된 모세관이 다량 존재하는 사실을 확인할 수 있었다.

Keywords

References

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