Prediction of Sound Attenuation of Road Traffic Noise During Propagation in Urban Area

城市地区道路交通噪声传播过程中的声衰减预测

基本信息

批准号：
63460178
负责人：
FUJIMOTO Kazutoshi
金额：
$ 4.29万
依托单位：
Kyushu University
依托单位国家：
日本
项目类别：
Grant-in-Aid for General Scientific Research (B)
财政年份：
1988
资助国家：
日本
起止时间：
1988 至 1990
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-63460178/
关键词：
Road traffic noise Noise propagation Noise prediction Excess attenuation of noise

项目摘要

The aim of this study is to develop the method to predict the sound attenuation of road traffic noise during its propagation in the urban areas. We want to establish a easy and practical method to calculate macro-distribution of road traffic noise in the area. In this predicting method, therefore, shape of each building in the area is not taken into consideration for calculation but only density of buildings is taken.In order to carry out this study, model experiments were at first performed. By the statistical analysis of experimental data, a new method to calculate the attenuation of noise from a vehicle was proposed. The outline of this procedure is as follows. A rectangle where the line connected by a vehicle and a receiving point is center was supposed and some parameters concerning to the density of buildings in the rectangle was used to calculate the attenuation of noise.Next, in order to make clear the validity of this calculating procedure, road traffic noise was measured on one hundred twenty-six receiving points at five places along real roads with heavy traffic volumes. The basic examination showed that attenuation of road traffic noise simply depended on the density of buildings in a triangle made by connecting a receiving point with a part of road. Now we are calculating attenuation of road traffic noise by computer simulation based on the method mentioned above.We have not completed this study yet but we will do as soon as possible.

这项研究的目的是开发一种方法，以预测城市地区传播期间道路交通噪声的巨大衰减。我们想建立一种简单且实用的方法来计算该地区道路交通噪声的宏分布。因此，在这种预测方法中，没有考虑到该区域中的每个建筑物的形状，而仅考虑建筑物的密度。在进行这项研究的过程中，首先进行了模型实验。通过对实验数据的统计分析，提出了一种计算车辆噪声衰减的新方法。此过程的轮廓如下。假设由车辆连接和接收点连接的矩形是一个中心的，并且使用矩形中建筑物密度的一些参数用于计算噪声的衰减。为了明确该计算过程的有效性，在五十六位接收到的五十六个重点沿现实道路上，在五十六个重点上衡量了这一计算过程的有效性。基本检查表明，道路交通噪音的衰减仅取决于三角形中建筑物的密度，即通过将接收点与部分道路连接起来。现在，我们正在根据上述方法通过计算机模拟来计算道路交通噪声的衰减。我们尚未完成这项研究，但我们将尽快做。