Description of Anomalous Noise Events for Reliable Dynamic Traffic Noise Mapping in Real-Life Urban and Suburban Soundscapes
Description of Anomalous Noise Events for Reliable Dynamic Traffic Noise Mapping in Real-Life Urban and Suburban Soundscapes
复制标题
DOI：
10.3390/app7020146
复制
发表时间：
2017-02-01
影响因子：
2.7
通讯作者：
Claudi Socoro, Joan
中科院分区：
文献类型：
--
作者：
Alias, Francesc;Claudi Socoro, Joan
交通噪声是城市和郊区的主要污染物之一。欧洲当局已采取若干举措，研究、预防和减少人口接触交通的影响。最近的技术进步允许通过无线声学传感器网络（WASN）（例如欧洲LIFE DYNAMAP项目中开发的网络）动态计算噪声水平。这些WESTERN应该能够检测和丢弃道路交通噪声中的非期望声源，表示为异常噪声事件（ANE），以生成可靠的噪声水平图。由于ANE的地方性、偶然性和多样性，一些作品选择了人为地建立ANE数据库，代价是失实陈述。这项工作提出了一个现实生活中的环境音频数据库的生产和分析，在两个城市和郊区，专门为异常噪声事件的收集。共9小时8分钟的标记的音频数据区分道路交通噪声，背景城市噪声和ANE。在手动划定它们的边界之后，ANE样本的声学显著性被自动计算为上下文信噪比（SNR）。现实生活中的环境数据库的分析显示高度多样性的ANE的发生，持续时间和信噪比，以及确认城市和郊区的声景之间的发生和信噪比的预期差异，和罕见的性质ANE。
Traffic noise is one of the main pollutants in urban and suburban areas. European authorities have driven several initiatives to study, prevent and reduce the effects of exposure of population to traffic. Recent technological advances have allowed the dynamic computation of noise levels by means of Wireless Acoustic Sensor Networks (WASN) such as that developed within the European LIFE DYNAMAP project. Those WASN should be capable of detecting and discarding non-desired sound sources from road traffic noise, denoted as anomalous noise events (ANE), in order to generate reliable noise level maps. Due to the local, occasional and diverse nature of ANE, some works have opted to artificially build ANE databases at the cost of misrepresentation. This work presents the production and analysis of a real-life environmental audio database in two urban and suburban areas specifically conceived for anomalous noise events' collection. A total of 9 h 8 min of labelled audio data is obtained differentiating among road traffic noise, background city noise and ANE. After delimiting their boundaries manually, the acoustic salience of the ANE samples is automatically computed as a contextual signal-to-noise ratio (SNR). The analysis of the real-life environmental database shows high diversity of ANEs in terms of occurrences, durations and SNRs, as well as confirming both the expected differences between the urban and suburban soundscapes in terms of occurrences and SNRs, and the rare nature of ANE.