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In the "Environmental Quality Standards for Noise," the problem of environmental noise in areas facing roads is evaluated by obtaining the numbers and the rates of the buildings at which noise levels ...exceed the environmental quality standards. In order to estimate noise distribution in the residential area facing roads, it is necessary to grasp the insertion loss caused by the buildings. The authors proposed in the previous study a simple method to predict the insertion loss of road traffic noise caused by detached houses when the road is at the same level with that of the houses. However, there are lots of residential areas where are located around an embanked road. In such residential areas, the noise would be expected to be higher. The purpose of this paper is to derive a new method to predict the insertion loss of road traffic noise caused by detached houses when a road is embanked. A one-twentieth scale model experiment is performed. On the basis of the experimental results, to extend the authors' previous predicting method to be applicable when a road is embanked is examined, and then a simple procedure to compensate the increase of noise level caused by the increase of the height of a road is derived. The results of an additional experiment, comparison with the former studies, and comparison with the measurement verify the validity of the proposed method.続きを見る
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Mendeley出力
jaud013_p083