Effect of heat treatment on the gas permeability, sound absorption coefficient, and sound transmission loss of Paulownia tomentosa wood

被引：21
作者：
Kang C.-W. [1 ]
Jang E.-S. [1 ]
Jang S.-S. [2 ]
Cho J.-I. [3 ]
Kim N.-H. [3 ]
机构：
[1] Department of Housing Environmental Design, and Research Institute of Human Ecology, College of Human Ecology, Chonbuk National University, Jeonju
[2] Department of Forest Products, College of Agriculture & Life Sciences, Chungnam National University, Daejeon
[3] Department of Forest Biomaterials Engineering, College of Forest and Environmental Sciences, Kangwon National University, Chuncheon
来源：
Journal of the Korean Wood Science and Technology | 2019年 / 47卷 / 05期
基金：
新加坡国家研究基金会;
关键词：
Paulownia tomentosa wood; Sound absorption coefficient; Sound transmission loss; Transfer function method; Transfer matrix method;
D O I：
10.5658/WOOD.2019.47.5.644
中图分类号：
学科分类号：
摘要：
In this study, the gas permeability, sound absorption coefficient, and sound transmission loss of the Paulownia tomentosa wood were estimated using capillary flow porometry, transfer function method, and transfer matrix method, respectively. The longitudinal specific permeability constant of the Paulownia tomentosa wood with a thickness of 20 mm was 0.254 for the control sample and 0.279, 0.314, and 0.452 after being subjected to heat treatments at 100 °C, 160 °C, and 200 °C, respectively. The gas permeability was observed to be slightly increased by the heat treatment. The mean sound absorption coefficients of 20-mm thick Paulownia tomentosa log cross-section for the control sample and after being subjected to heat treatments at 100 °C, 160 °C, and 200 °C were 0.101, 0.109, 0.096 and 0.106, respectively. Further, the noise reduction coefficients of 20-mm thick Paulownia tomentosa log cross-section of the control sample and after being subjected to heat treatment at temperatures of 100 °C, 160 °C, and 200 °C were 0.060, 0.067, 0.062 and 0.071, respectively. The mean of sound transmission loss of the 20-mm thick Paulownia tomentosa log cross-section was approximately 36.93 dB. Furthermore, the gas permeability and sound absorption coefficient of the heat-treated Paulownia tomentosa discs slightly increased depending on the heat treatment temperature; however, the rate of increase was insignificant. © 2019, Korean Society of Wood Science Technology. All rights reserved.
引用
收藏
页码：644 / 654
页数：10
相关论文
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