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. 2021 May 28;18(11):5799. doi: 10.3390/ijerph18115799

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© 2021 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).

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Average noise variation ( $L_{A e q},$ 1min $_{2020}$ - $L_{A e q},$ 1min $_{2018 t o 2019}$ ) in all low-traffic residential sensor locations during the first semester and the three main lockdown stages of 2020 compared to the averaged same periods of 2018 and 2019.