Effect of heat treatment temperature and time on sound absorption coefficient of Larix kaempferi wood
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Heat treatment improves the dimensional stability and hydrophobicity of wood, and heat-treated wood is currently attracting attention as a new interior material. However, there are few evaluations where the acoustic properties of heat-treated wood are reported when such wood is used as an interior material. In this study, Larix kaempferi wood, typically used as a building material, was heat-treated at 200, 220, and 240 °C for 9, 12, 15, and 18 h. The sound absorption coefficients of the treated wood samples were measured at 250, 500, 1000, 2000, and 4000 Hz in a reverberation room. The sound absorption coefficient increased with the treatment temperature and the treatment time. The results of this study showed that the high-frequency band range sound absorption coefficient of wood can be increased dramatically by heat treatment.
KeywordsLarch (Larix kaempferi) Reverberation room method Sound absorption coefficient Wood heat treatment
The authors are grateful for the Grant provided by the Korea Forest Service ‘Forest Science and Technology Projects (Project no. S121315L010100)’.
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