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In the former study, the authors proposed an empirical formula to predict excess attenuation of road traffic noise by detached houses on the basis of the experiment in which model houses with flat roo...fs and the same height were used. On the other hand, most of detached houses have slanted roofs, and the houses with various heights are mixed in the actual residential houses in Japan. Two experiments were performed in this paper to examine the validity of applying the formula to real residential area. In the first experiment, the model houses with gable roofs were used, and in the second one the houses with various height were mixed in the residential area. The results were compared with the predicted values by the authors' formula, and good agreement was found between them. This shows that the formula is applicable to the houses with gable roofs or various heights.show more
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jaud004_p139