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机构地区:[1]北京林业大学材料科学与技术学院 [2]木质材料科学与应用教育部重点实验室,北京100083
出 处:《木材工业》2014年第3期34-38,共5页China Wood Industry
基 金:国家林业公益性行业科研专项“低成本无烟高效阻燃木质材料制造关键技术研究”(201204704);北京市教育委员会共建项目专项资助“速生材高效利用技术”;北京市教育委员会共建项目专项资助“人工林速生材的结构用集成材材性及应用性能研究”
摘 要:采用驻波管法测量木丝板的吸声系数,分析板材厚度、密度、后背空腔深度、组合方式等因素对木丝板吸声性能的影响。结果表明:木丝板的吸声性能符合多孔材料吸声机理;在0~2000Hz的声频范围内,木丝板的吸声性能随着声波频率和板材密度的增大而提高,增加背面空腔深度能够提高材料的吸声系数;厚度10mm、密度0.50g/cm^3木丝板的吸音效果较理想,不同密度的木丝板组合使用,亦可提高其吸声性能。The stationary wave tube method was used to measure the sound absorption coefficient of wood wool boards. Effects of thickness, density,back cavity depth and density combination were used to analyze sound absorption performance of the boards. Results showed that the wood wool board conformed to absorption mechanism of porous material as audio frequency ranging from 0 2 000 Hz. Sound absorption performance was improved as the board density and thickness inceased. And sound absorption coefficient could be improved by deeper cavity on the back side. The wood wool board having 10 mm thickness and 0. 50 g/cm^3 density was an ideal sound absorption material. Combination of different board densities could improve acoustic performance.
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