• 关键词：

• 基金项目：

• 程明昆
• 中国科学院声学研究所

• 柯豪
• 中国科学院声学研究所

• 摘要：本文试图通过对北京地区的不同绿化结构声衰减的测量和分析,找出减噪效果较好的绿化结构形式。从各种绿化结构的声衰减结果可以看到绿篱、乔灌木和草坪构成的绿带效果较好,平均可以减噪5dB(A)。

• Abstract：This paper emphasizes the point with the expected results of noise attenuation by various forms of urban planting around Beijing City. In general, the forest brings about an excess of attenuation of 1 dB(A) every 10 meters, the trees on the pavement and the lane-separated trees have the effect of noise reduction only 2.5 dB(A), wbereas the mixed structures consisting of hedge, trees, shrubbery and grass have better effect. For example, noise may be lowered 5 dB(A) on the average for the mixed green belt with high canopy density.In addition, method of measuring noise attenuation outdoor is described and mechanism of excess noise reduction due to planting is discussed.

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