<正>用驻波管法测定了杉木,银杏、泡桐、红松、马尾松、香樟、酸枣木、水曲柳、装饰纤维板和杉木不同表面积的法向吸声系数α_p,得到在一定条件下法向吸声系数α_p与入射材料表面声波频率ν的实验曲线。它对研究木材及其制品的吸声特性和在建筑声学中的应用都有参考价值。

In this experiment, the normal acoustic absorptivity coefficients ap of Cunninghamia lanceolata (Lamb.) Hook, Ginkgo biloba L., Pavlownia tomentosa (Thunb.) steud, Pinus koraiensis sieb. et Zucc. Pinus massoniana Lamb, Cinna-momum comphora (L.) Presl, Choerospondias axillaris (Roxb.) Burtt et Hill and Fraxinus mandshurica Rupr are examined with the method of stationary wave tube and the ap of C. lanceolata (Lamb.) Hook on different surfuce areas and that of decorative fiber board tested,too. Thus the experimental curve is obtained showing the relation-ship between ap and the frequency v of acoustic waves acted on the incident material surfare under particular conditions, it is of reference value to studing the properties of acoustic absorption of wood and its products and to building acoustics as well.