Measurements of acoustic environments for urban soundscapes: Choice of homogeneous periods, optimization of durations, and selection of indicators
Measurements of acoustic environments for urban soundscapes: Choice of homogeneous periods, optimization of durations, and selection of indicators
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DOI：
10.1121/1.4807809
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发表时间：
2013-07-01
影响因子：
2.4
通讯作者：
Ribeiro, Carlos
中科院分区：
文献类型：
--
作者：
Brocolini, Laurent;Lavandier, Catherine;Ribeiro, Carlos
为了尽量减少声学测量的持续时间，并从时间的角度来描述均匀区域的特征，在巴黎连续三个月进行了一系列的六个位置测量。每个位置提取了约5万个5分钟、10分钟、15分钟、20分钟、30分钟和1小时持续时间测量的样本。每个样本的特点是11个能源指标和10个事件描述符。本文详细分析了一个十字路口的选址问题。通过等级上升分类和人工神经网络分类，可以检测到四个均匀的周期：两个在夜间，一个在白天，一个过渡对应于觉醒或城市福尔斯入睡的时刻。10-需要最小测量值来区分十字路口位置处的这些时间段。在文章的最后，与其他位置的比较表明，最小持续时间状态在10和20分钟之间。均匀周期连接到人类活动，并取决于位置。L-Aeq、L-A10或L-A90等能量指标和事件指标是描述不同集群特征所必需的。(C)2013年美国声学学会。
In order to minimize the duration of acoustic measurements and to characterize homogeneous areas from a temporal point of view, a series of six location measurements was carried out continuously during three months in Paris. Around fifty thousand samples of 5-min, 10-min, 15-min, 20-min, 30-min, and 1-h duration measurements were extracted for each location. Each sample is characterized by eleven energy indicators and ten event descriptors. In this paper, analysis of a crossroad location is detailed. Through hierarchical ascendant classification and artificial neural networks classification, it is shown that four homogeneous periods can be detected: two during the night, one during the day, and one transition corresponding either to the awakening or to the moment when the city falls asleep. 10-min measurements are necessary to discriminate these time periods at the crossroad location. At the end of the paper, a comparison with the other locations shows that minimum duration states in between 10 and 20 min. The homogeneous periods are connected to the human activities and depend on the location. Energy indicators such as L-Aeq, L-A10, or L-A90 and event indicators are necessary to characterize the different clusters. (C) 2013 Acoustical Society of America.