How the COVID-19 Pandemic Muted and Remixed the World’s Acoustics for a While

Abstract

Purpose of ReviewThis review aims to analyze the effects of the pandemic on the world's sound environment. Recent Findings The confinements associated with the pandemic led to a reduction in sound levels worldwide and a change in the perception of soundscapes in the absence of traffic noise and human-generated noise. Summary In response to the COVID-19 pandemic, many countries and regions around the world adopted a series of interventions in 2020 that have been referred to as "lockdown" or "confinement." These sets of restrictions had a clear and obvious consequence derived from the absence of people in the streets and the reduction of daily activity and commuting, which caused an unprecedented silencing on a large scale. Along with the silence that ensued, the pandemic and the confinements affected acoustics and our relationship with sounds on different scales. In the cities, this phenomenon had a strong reduction in acoustic intensity due to the absence of vehicles on the streets. Perhaps this was more perceptible in our neighborhoods, with notable changes in their soundscapes, first due to the absence of people in the streets and later due to more outdoor activity derived from the fear of the spread of the virus in indoor spaces. The longer periods of time spent in our homes during the lockdowns also highlighted the importance of sound insulation in buildings and the acoustic conditioning of our schools or homes.

Noise levels comparison before, during and after lock-down periods due to Covid-19 in Italy

“…Only a few studies also include the period just after the lock-down one referring to the months during which a return to "normality" is envisaged. In fact, as stated in [5], [6], according to data collected by monitoring units distributed throughout the city of Barcelona, the progressive release of the restrictions reactivated city activity, and lead to a progressive restoration of noise levels until they reached values comparable to those of previous years once the confinement was over. However, the recovery of noise activity is still not complete, although it is unclear whether this could be related to the noise abatement strategies that the city has been implementing in recent years, to the fact that the full normality was not reached after the end of the lockdown, or to the fact that habits could be definitively changed.…”