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首页> 外文会议>International Congress on Sound and Vibration >A CASE STUDY OF THE EFFECT OF ASSESSMENT HEIGHT OF THE END NOISE INDICATORS ON THE ESTIMATION OF POPULATION EXPOSURE TO ROAD TRAFFIC NOISE
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A CASE STUDY OF THE EFFECT OF ASSESSMENT HEIGHT OF THE END NOISE INDICATORS ON THE ESTIMATION OF POPULATION EXPOSURE TO ROAD TRAFFIC NOISE

机译：结束噪声指标评估高度对道路交通噪声估算的案例研究

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EU DIRECTIVE 2002/49/EC (END) requires that strategic noise mapping should be implemented at an assessment height of 4 m, at the most exposed building facade, and for predefined 5 dBA ranges of the noise indicators L_(den) and L_(night). A small part of the urban agglomeration of Southern Athens was used as a test case to investigate the impact of assessment height of noise indicators on the estimation of population exposure to environmental noise. The noise model that was used for the strategic noise mapping of the entire agglomeration was, also, used for road-traffic noise calculations for different assessment heights and for the estimation of the total number of people living in buildings that are exposed to the L_(den) and L_(night) defined bands. Facade calculations of L_(den) and L_(night) at 4 meters are compared to those at 2 meters and at higher heights covering all floors (buildings in the area up to ten-storeys/30m). The differences between calculated noise indicators at different heights, as well as the resulting differences in the population exposure estimates, are analysed. In this case, the use of a 4 m assessment height is in general indicative of the noise level exposure of the building and there are only limited variations as compared to either 2m or higher heights, with mean values of the differences remaining well below 1 dBA. The few exceptions where observed differences exceed 3 dBA can be attributed to the exposure to road noise sources, which are masked in lower floors, rather than urban street canyon effects. The effect of assessment height on the estimated population exposure was found to be rather small in the reported case study. It is also demonstrated that assigning inhabitants proportionally to facades instead of using the most exposed facade would have a much higher impact.
机译：欧盟指令2002/49 / EC（END）要求在最暴露的建筑立面上的评估高度为4米的评估高度和预定义5 dBA范围L_（DEN）和L_（夜晚）。南部南部城市集聚的一小部分被用作测试案例，以研究噪声指标评估高度对人口暴露于环境噪声的影响。用于整个聚集体的战略噪声映射的噪声模型也用于不同评估高度的道路交通噪声计算，并且估计生活在暴露于L_的建筑物中的人数（ DEN）和L_（夜晚）定义的频段。与2米处的L_（DEN）和L_（夜晚）的外观计算与2米处的L_（夜晚）和覆盖所有楼层的高度（面积的建筑物最多为10楼/ 30米）。分析了不同高度计算的噪声指示器之间的差异，以及人口曝光估计的产生差异。在这种情况下，使用4米的评估高度一般表示建筑物的噪声水平曝光，与2M或更高的高度相比，只有有限的变化，其平均值差异远低于1 dBA 。观察到的差异超过3 dBa的少数例外可能归因于接触道路噪声来源，这些噪声源在较低地板中掩盖，而不是城市街道峡谷效应。在据报道的案例研究中发现评估高度对估计人口暴露的影响。还表明，将居民分配到外墙而不是使用最暴露的外观的影响将产生更高的影响。

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