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国产吸声材料的吸声系数测定的初步报告

魏荣爵 余崇智

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国产吸声材料的吸声系数测定的初步报告

魏荣爵, 余崇智

A PRELIMINARY REPORT ON MEASUREMENTS OF SOUND ABSORPTION COEFFICIENTS OF CHINESE ACOUSTICAL MATERIALS

WEI YUNG-CHIO, YU CHUNG-CHI
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  • 本报告首先列举用驻波分析法所测得的若干国产吸声材料——包括纤维板,木屑板,木丝板,玻璃绵砖,毛毡及棉絮等等——的声波垂直入射的吸声系数,并对于吸声系数的定义以及几种不同吸声系数间的转换问题也作了简单的讨论。测量结果指出:许多产品吸声效率都很低,特别是在低频。(某些产品作为“薄板吸声”来控制室内音质是可以的,但不宜当作多孔性材料来使用。某些厂家在广告中注以“隔声”和“隔热”等名词尤其是不恰当的。)其次,对于(1)材料粉刷,涂漆,和穿孔的影响,(2)有效厚度和流阻的关系,以及(4)薄板,薄的多孔性材料,和穿孔吸声结构的吸声性能等,都作了测量,并附以必要的理论说明。对于穿孔吸声结构阐述较多,主要是由于这种吸声结构应用的范围可以很广泛而目前国内使用得还远不够多。最后作者们根据所测定的结果,对国内吸声材料的使用和制造提出了一些初步的建议。
    Normal sound absorption coefficients of some Chinese acoustical materials as measured by the tube method were tabulated and problem of conversion to random coefficients was discussed. Our results: most of the prefabricated units showed low absorption efficiency especially at low frequencies.In order to clarify the feasibility of these acoustical materials and to throw some light on the development of our future acoustical material industry, test data and relevant theoretical interpretations were presented for the effects of paint, thickness, flow resistance, and perforations etc. on absorption characteristics, and also for the functions of panel and perforated-panel absorbers. Emphasis was made for the last type for its versatile acoustical applications and insufficient use in this country. A conclusion was drawn with several suggestions both for the improvement of the existing products and for the manufacture of new ones.
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  • 文章访问数:  8385
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  • 被引次数: 0
出版历程
  • 收稿日期:  1957-03-21
  • 刊出日期:  1957-05-20

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