柳杉木材吸声性能的研究  

Study on sound absorption characteristics of Cryptomeria fortunei Hooibrenk ex Otto et Dietr

作　　者：王东[1] 彭立民[1] 傅峰[1] 王军锋[1] 朱广勇[1] 

机构地区：[1]中国林业科学研究院木材工业研究所,北京100091

出　　处：《中南林业科技大学学报》2014年第10期137-140,共4页Journal of Central South University of Forestry & Technology

基　　金：国家十二五科技支撑计划课题:"家装材与室外材增值制造技术研究与示范"(2012BAD24B02)

摘　　要：实木的吸声性能与其微观构造有着紧密的联系，研究实木的吸声性能有着重要的现实意义。本实验利用阻抗管，研究了柳杉木材吸声性能与其纹理方向、厚度、心边材、木材含水率之间的关系。结果表明在纹理方向上横切面的吸声性能最好，边材略高于心材。在1500∽2500 Hz内，随木材厚度的增加吸声系数不断增加，并且随厚度的增加吸收峰会向低频方向移动，随厚度增加高频的吸声系数会降低，纤维饱和点以下木材吸声性能明显高于纤维饱和点以上的。The sound absorption performance of solid wood is closely linked with its microcosmic structure. The research of sound absorption performance of solid wood has important practical significance. The relations between Cryptomeria fortunei’s sound-absorbing properties and texture, thickness, heartwood and sapwood, and moisture content were investigated by using impedance tube method. The results show that the sound absorption performance on the cross-section in the texture direction was the best, the sound absorption coefficient of sapwood was slightly higher than that of heartwood’s;As the thickness of the tested wood increased the sound absorption coefficient also raised correspondingly within the 1500∽2500 Hz;and the sound absorption coefficient moved toward the low-frequency direction. the sound absorption coefficient with high frequency reduced, and the wood’s sound-absorbing properties that its moisture content was under fiber saturation point, was higher than that its moisture content was above fiber saturation point.

关 键 词：柳杉木材 实木吸声性能 吸声系数 木材微观构造 

分 类 号：S781.38[农业科学—木材科学与技术] S791-31[农业科学—林学]