特雷维喷泉在Covid-19沉默中的音景

IF 1.7 Q2 ACOUSTICS Noise Mapping Pub Date : 2020-01-01 DOI:10.1515/noise-2020-0018
E. De Lauro, M. Falanga, L. Lalli
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引用次数: 10

摘要

摘要本文对意大利罗马特莱维喷泉的声景进行分析,比较意大利因新冠肺炎(Sars-COV2)卫生突发事件封锁期间的声景特征及其前后的声景特征。封锁代表了一个特殊的环境,因为到处都是几个世纪以来从未出现过的寂静,这为识别著名的特莱维喷泉发出的声音的“特征”以及识别它与其他特征的相互作用提供了机会。签名对于保护问题和文化遗产非常重要。在现场调查中,通过手持麦克风记录了声景,同时获得了喷泉周围的声波场。我们发现,频谱内容取决于麦克风的位置,揭示了一个非常复杂的波场,在锁定期间显示出远低于1kHz的强振幅,频带延伸至10kHz。在远离封锁的一段时间内,我们发现了一个大约700-1kHz的额外频段,它不仅增加了以前的频谱,而且起到了同步机制的作用。重要的观察结果是,Covid-19的沉默让几个世纪以来一直存在的声音出现了,并为我们提供了记录它们的可能性,以便客观地研究“声印”。此外,我们还研究了声场的空间化特征。
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The soundscape of the Trevi fountain in Covid-19 silence
Abstract This paper is devoted to the analyses of sound-scape at fontana di Trevi in Rome (Italy) with the aim to compare its characteristics during the Italian lockdown due to the (Sars-COV2) Covid-19 sanitary emergency and its characteristics before and after such time. The lockdown has represented an exceptional environment due to the silence everywhere, never occurred in centuries, offering the opportunity to recognize the “signature” of the sound emitted by the famous Fontana di Trevi and recognize how it interacts with other features. The signature is important for preservation issues and cultural heritage. The soundscape was documented in a field survey by means of hand held microphones, which acquired simultaneously the acoustic wavefield all around the fountain. We find that the spectral content depends on the microphone location, revealing a very complex wavefield, showing strong amplitudes during the lockdown well below 1kHz and a frequency band extending up to 10kHz. In a time period far from the lockdown, we evidence an additional frequency band around 700-1kHz, which not simply adds to the previous spectrum, but acts as a synchronization mechanism. The important observation is that the Covid-19 silence let emerge sounds that had been there for centuries, and afforded us the possibility to document them in order to study objectively a “soundprint”. Moreover, we studied the spatialization characteristics of the soundfield.
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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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