International Joint Study for the Development of Mixed Traffic Noise Evaluation - Japanese Part of Joint Study with Gothenburg University, Sweden

作为与日本Muroran理工学院和瑞典哥德堡大学的联合研究项目的一部分，在日本北海道三个城市的道路交通噪音严重暴露的居民区进行了社区反应的社会调查。使用标准问卷对从官方登记册中随机抽取的146人进行了个人访谈。访谈结束后，在三个城市的区域参考点进行了24小时噪声测量。通过测量与各自区域参考点的相对噪声水平，估计所有受访者房屋的噪声暴露情况。通过等效噪声级（L_<Aeq>）、昼夜平均声级（L_<DN>）和最大噪声级（MNL）对道路交通噪声和噪声暴露引起的烦恼进行回归分析。回归模型不能解释烦恼反应的大部分变化。通过个人访谈获得了9个外生变量和2个内生变量，并进行了通径分析来解释烦恼反应。路径模型解释了烦恼反应中大约一半的变化。该模型证实了睡眠障碍对道路交通烦恼的强烈影响。听力障碍、对区域的满意度、就业状况和自我报告的道路交通噪音对烦恼的敏感性也有重要影响。

As a part of the joint study program with Muroran Institute of Technology, Japan, and the University of Gothenburg, Sweden, social surveys of community responses were performed in residential areas heavily exposed to road traffic noise in three cities in Hokkaido, Japan. Personal interviews with a standard questionnaire were made with 146 persons randomly selected from official registers. After the interviews, 24-hour noise measurements were made at the area reference points in the three cities. Noise exposures ay all respondents' houses were estimated by measuring relative noise levels to the respective area reference points. Regression analyses were performed on annoyance due to road traffic noise and noise exposure defined by Equivalent Noise Level (L_<Aeq>), Day-Night Average Sound Level (L_<DN>) and Maximum Noise Level (MNL). The regression models could not explain a large part of the variation in the annoyance responses. A path analysis was performed to explain the annoyance responses by nine exogenous and two endogenous variables obtained via the personal interviews. The path model explained about half of the variation in the annoyance responses. The model confirmed the strong effect of sleep disturbance to road traffic annoyance. It also showed important effects of hearing disturbance, satisfaction with the area, employment status and the self-reported sensitivity to annoyance due to road traffic noise.