Firstly, a research of the calculation of noise prediction model based on GIS, noise impact index, as well as the database design are conducted; Secondly, VB6.
首先对基于GIS的噪声预测模型计算、噪声冲击指数计算，以及数据库设计等关键技术问题进行了研究，然后选择了VB6。
Based on the old evaluating methods of road traffic noise, the traffic noise integrated impact index was proposed, the unsteady characteristic of road traffic noise was considered.
在分析既有环境噪声评价方法的基础上，根据交通噪声非稳态性的特点，提出了交通噪声综合影响指数的概念。
Based on the old evaluating methods of road traffic noise, the traffic noise integrated impact index was proposed, the unsteady characteristic of road traffic noise was considered.
在分析既有环境噪声评价方法的基础上，根据交通噪声非稳态性的特点，提出了交通噪声综合影响指数的概念。
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