新冠肺炎疫情对意大利米兰市声环境的影响

IF 1.7 Q2 ACOUSTICS Noise Mapping Pub Date : 2021-01-01 DOI:10.1515/noise-2021-0009
G. Zambon, C. Confalonieri, F. Angelini, R. Benocci
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引用次数: 11

摘要

摘要本文介绍了新冠肺炎疫情期间意大利米兰市区噪声监测结果。为了限制疫情的传播,意大利采取了越来越严格的限制措施,最终于2020年3月23日至5月3日实施了为期41天的封锁。这一行动创造了一种新的环境,包括空气、水和土壤污染物的显著减少,以及原本受到损害的生态系统的部分恢复。米兰市安装了一个由24个传感器组成的永久性噪音监测系统,可以捕捉封锁前、封锁期间和封锁后(2020年2月至6月)城市声音环境的变化。与2019年同期相比,绝对噪声级(Lden)和每小时噪声剖面(封锁期间的中位数)的噪声级显著降低了约6 dB。从记录的噪声水平中分离出所有非交通噪声或异常噪声事件(ANE)的贡献,我们观察到后者在封锁期间的贡献更大。在扩展的城市区域使用DYNAMAP噪声预测系统可以评估暴露在噪声中的人口,估计与2019年相比,暴露在Lden低于53 dB(A)和Lnight低于45 dB(B)的噪声中的人群分别增加了14.9%和16.4%。
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Effects of COVID-19 outbreak on the sound environment of the city of Milan, Italy
Abstract In this paper, we present the results of the noise monitoring in the urban area of Milan, Italy, associated with COVID-19 outbreak. In order to limit the diffusion of the pandemic, Italy adopted growing levels of restrictive measures, which ended with a 41-day lockdown from March 23 to May 3 2020. This action created a new kind of environment including a remarkable reduction of air, water and soil pollutants, together with a partial recovery of the ecosystems otherwise compromised. The presence of a permanent noise monitoring system made of 24 sensors installed in the city of Milan, allowed capturing the changes in the urban sound environment in a pre, during and post-lockdown period (months from February to June 2020). The comparison of the noise levels in terms of both absolute noise levels (Lden) and hourly noise profiles (median over lockdown period) with the same period of 2019, showed a dramatic reduction of the noise levels of approximately 6 dB. Splitting the contribution of all-non-traffic noises or anomalous noise events (ANE) from the recorded noise levels, we observe a greater contribution of the latter during the lockdown period. The use of DYNAMAP noise prediction system over an extended urban area allowed the evaluation of the population exposure to noise, estimating an increase of 14.9% and 16.4% of the exposed population to noises with Lden below 53 dB(A) and Lnight below 45 dB(A) with respect to 2019.
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来源期刊
Noise Mapping
Noise Mapping ACOUSTICS-
CiteScore
7.80
自引率
17.90%
发文量
5
审稿时长
12 weeks
期刊介绍: Ever since its inception, Noise Mapping has been offering fast and comprehensive peer-review, while featuring prominent researchers among its Advisory Board. As a result, the journal is set to acquire a growing reputation as the main publication in the field of noise mapping, thus leading to a significant Impact Factor. The journal aims to promote and disseminate knowledge on noise mapping through the publication of high quality peer-reviewed papers focusing on the following aspects: noise mapping and noise action plans: case studies; models and algorithms for source characterization and outdoor sound propagation: proposals, applications, comparisons, round robin tests; local, national and international policies and good practices for noise mapping, planning, management and control; evaluation of noise mitigation actions; evaluation of environmental noise exposure; actions and communications to increase public awareness of environmental noise issues; outdoor soundscape studies and mapping; classification, evaluation and preservation of quiet areas.
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