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Changes of Sound Absorption Capability and Anatomical Features of Wood by Delignification Treatment  

Kang, Chunwon (Department of Forest products, Iksan National College)
Lee, Namho (Wood Science & Technology Major, Chonbuk National University)
Publication Information
Journal of the Korean Wood Science and Technology / v.33, no.4, 2005 , pp. 9-14 More about this Journal
Abstract
Changes of sound absorption capability and anatomical features of wood by delignification treatment was estimated. Sound absorption coefficients of wood and delignificated wood had been measured by the two microphone method and anatomical changes of delignificated wood examined by SEM observation. The sound absorption coefficients of delignificated wood generally seemed to be higher than those of normal specimen. Especially, in the frequency range of 2 to 4 KHz, they was about 50% higher than those of normal specimen. Abundant small cracks generated on the cross sectional surface of delignificated wood and the weight of delignificated wood decreased about 8% than that of normal wood. It was considered that the small cracks formed by delignification treatment behaved as a sound absorbing pore.
Keywords
Sound absorption coefficient; delignificated wood; anatomical changes;
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Times Cited By KSCI : 1  (Citation Analysis)
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