Noise exposure of residential areas along LRT lines in a mountainous city.
Noise exposure of residential areas along LRT lines in a mountainous city.
复制标题
DOI：
10.1016/j.scitotenv.2016.03.097
复制
发表时间：
2016-10
期刊：
影响因子：
--
通讯作者：
Hui-Min Xie;Heng Li;Cen Liu;Mingyue Li;Jingwen Zou
中科院分区：
文献类型：
--
作者：
Hui-Min Xie;Heng Li;Cen Liu;Mingyue Li;Jingwen Zou
近年来，轻型快速交通系统在中国的一些城市得到了广泛的应用。与平原城市不同，山地城市城区道路网密集，建筑密度高。由于山地城市特殊的地形条件，城市轻轨交通的噪声影响更为复杂和显著。通过现场测量和问卷调查，对重庆市典型山地城市轻轨沿着居民区噪声暴露情况进行了研究。将轻轨线路与城市山地环境的关系分为8种典型的空间形态。轻轨沿着居民区的室内外声环境均超过国家标准，最高可达15 dBA，且以低频为主。轻铁噪音在“轨下”和“经过”的地方较“轨上”或“朝向”的地方为多。声学测量与当地居民的主观评价之间取得了良好的协议。噪声较大地区的居民受轻轨噪声的干扰和影响较大，有63.2%的被访居民曾被轻轨噪声吵醒。在各种城市噪声源中，轻铁噪声导致最大比例的高度烦恼的居民（30.9%），和声环境被认为是最迫切的环境因素，以改善42.2%的参与者。轻铁噪音的首选控制策略是可行的，但在实践中受到限制。此外，噪声敏感度和年龄可能会显着影响轻铁噪声烦恼和影响，而窗玻璃和停留时间没有显着的影响。
Light rapid transit (LRT) has been widely used in a number of Chinese cities in recent years. Different from plain cities, the urban areas in mountainous cities are featured with dense road networks and high density of buildings. The noise impact of urban LRT could be more complex and significant due to the special morphological conditions in mountainous cities. This paper aims to investigate the noise exposure of residential areas along LRT lines in a typical mountainous city, namely Chongqing in Southwest China, through a series of field measurements and questionnaire surveys. Eight typical spatial configurations were classified to represent the relationships between LRT lines and urban mountainous environment. Both the outdoor and indoor acoustic environment of residential areas along LRT lines largely exceeded the national standards by up to 15 dBA, with dominant at low frequencies. The LRT noises tend to be more dominant on the ‘below track’ and ‘passing through’ rather than ‘above track’ areas or ‘facing towards’ locations. Good agreements were achieved between acoustic measurements and subjective evaluations from the local residents. Residents in the noisier areas tend to be more annoyed and influenced by the LRT noise, and 63.2% of interviewed residents once were awakened by the LRT noise. Among various urban noise sources, LRT noise resulted in the largest percentages of highly annoyed residents (30.9%), and acoustic environment was identified by 42.2% of the participants as the most urgent environmental factor to be improved. The preferred control strategies for LRT noise are possible but limited in practice. Moreover, noise sensitivity and age might significantly affect LRT noise annoyance and impact, whereas window glazing and residence time have no significant influence.