为了减弱城市噪声的干扰,可以采取各种措施,其中包括运用绿化带、密树林、障壁、地形以及它们的组合来隔离噪声本文根据在南京测量的结果,分析了几种绿化带和树林的减声作用,在测量中使用倍频带白噪声,测量的频率范围是125赫至4000赫。减声作用是根据有、无绿化带声学障壁存在时所测得的声压级的比较。文中对于从减弱噪声考虑设置绿化带及树林提出了若干建议,也对某些国家在这方面的研究成果作了介绍。 In order to reduce the interference of urban noise, a variety of measures can be taken, including the use of green belt, dense woods, barriers, topography and their combination to isolate noise. Based on the results measured in Nanjing, Acoustics, using octave white noise in the measurement, measured frequency range is 125 Hz to 4000 Hz. The sound reduction effect is based on a comparison of the sound pressure levels measured with and without the acoustic barrier of the green belt. In this paper, we put forward some suggestions on how to set green belts and woods from noise reduction, and also introduce the research results of some countries in this field.