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为了摸清绿化树种、结构、林带宽度等对减少噪音的作用,我们同中国科学院声学研究所,北京市园林科学研究所于1979—1980年对北京市现有绿化类型进行了测量、分析、研究,现将结果介绍如下。一、试验材料与方法试验以现有绿化型(包括草皮、片林、行道树、杂木林等)为材料,将影响噪音试验的干扰因素固定在同等水平上,采用现场测量对比的方法。 1.在北京市范围内,依据噪声污染程度,绿化实体的树种组成结构和配置,绿带宽度等因素,选择了15个绿化实体作为研究减噪试验点,再根据代表性和试验值的可信程
In order to find out the effect of tree species, structure and width of forest on noise reduction, we measured and analyzed the existing greening types in Beijing from 1979 to 1980 with Institute of Acoustics, Chinese Academy of Sciences and Beijing Institute of Landscape Architecture, Research, the results are as follows. First, the test materials and methods to test the existing green type (including turf, patch forest, street trees, miscellaneous woods, etc.) for the material, will interfere with the impact of noise test factors fixed on the same level, the use of field measurement and comparison methods. 1. Within the scope of Beijing Municipality, 15 greening entities were selected as research noise reduction points according to the degree of noise pollution, tree species composition and configuration of greening entities, green belt width, etc. Based on the representativeness and test values Credit process