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A study on predicting method of insertion loss of road traffic noise by detached houses at the areas feeing road

道路通电地区独立式住宅道路交通噪声插入损失预测方法研究

基本信息

批准号：
15560513
负责人：
FUJIMOTO Kazutoshi
金额：
$ 2.18万
依托单位：
KYUSHU UNIVERSITY
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
2003
资助国家：
日本
起止时间：
2003 至 2004
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-15560513/
关键词：
Road Traffic Noise Environmental Quality Standards for Noise Excess Attenuation of Noise by buildings ASJ RTN-Model 2003 模型実験超過減衰騒音伝搬騒音予測盛土道路

项目摘要

The object of this study is to propose a new predicting method of insertion loss of road traffic noise by detached houses at the areas facing road, which is necessary when evaluating the Environmental Quality Standards for Noise revised in 1998. Namely, a predicting method of insertion loss of road traffic noise by detached houses at the areas facing a plane road or an embanked road is firstly proposed, and the characteristics of noise distribution at such residential areas are then clarified by a numerical simulation using the proposed method, and lastly the validity of the proposed method for evaluation of the Environmental Standards for Noise is presented. In order to achieve the above objects, one-twentieth scale model experiments are performed in a semi-anechoic chamber. In this experiment, the frequency range of the model noise source is improved into covering the frequencies between 20Hz and 5000Hz, and consequently the accuracy of the experiment is increased. And moreover the kinds of objective roads are extended into an embanked road as well as a plane road. Next, the numerical simulations of predicting noise distribution in the residential areas where various detached houses are built are performed on the base of a Monte Carlo Method. As a result, the characteristics of noise distribution are clarified, and the warning points when ASJ Model is applied to the evaluation of the Environmental Quality Standards for Noise are pointed out.

本研究的目的是提出一种新的预测方法，独立式住宅的道路交通噪声的插入损失，这是必要的，在评价1998年修订的环境质量标准的噪声。首先提出了面向道路或路堤的独立式住宅道路交通噪声插入损失的预测方法，然后利用该方法进行数值模拟，阐明了这类住宅区的噪声分布特征，最后说明了该方法对评价《噪声环境标准》的有效性。为了实现上述目的，在半电波暗室中进行了1/20缩尺模型实验。在本实验中，将模型噪声源的频率范围扩大到20 ~ 5000 Hz，从而提高了实验的准确性。并将目标道路的类型扩展为路堤道路和平面道路。其次，在蒙特卡罗方法的基础上，对各种独立式住宅小区的噪声分布进行了预测的数值模拟。阐明了噪声分布特征，指出了ASJ模型应用于《噪声环境质量标准》评价时的注意事项。