British researchers have analyzed the amount of aerosols and droplets generated by singing artists. According to the results, singing does not produce more potentially contaminated particles than the simple act of speaking. On the other hand, it should be emphasized that this is only effective at equal volume.
SARS-CoV-2 is transmitted via contaminated droplets contained in aerosols floating in the air. These same droplets can also fall on certain surfaces, the contact of which must be the subject of precautions. As part of the Perform research project at the University of Bristol (UK), researchers have examined the amount of droplets emanating from singing of 25 artists from all musical backgrounds. We are talking about artists from opera, musical theatre, pop, jazz and gospel.
As the BBC explained in an August 20, 2020 article, the volunteers performed a series of exercises that included singing at different heights and volumes. Moreover, these tests were carried out in a room in the total absence of other aerosols. Indeed, the leaders of the study wanted to analyze the aerosols produced by specific sounds. According to them, the volume of the voice has a significant impact on the amount of aerosols. Between the lowest and the highest level of song (or speech), the emanations of particles can be 30 times greater. In other words, the volume is a determining factor in the projection of droplets, much more than the medium itself.
Singing therefore does not represent an excessive risk, so this research could have an influence on decisions regarding venue restrictions. Remember that currently in France, musical events cannot accommodate more than 5,000 people, unless there is an exemption. Let us also mention the fact that ventilation can have a role in the diffusion of aerosols. According to British researchers, the larger the room, the greater the ventilation and concentrated volumes.
Particle scattering has been the subject of a variety of research. With the gradual resumption of air traffic, it was necessary to think about new regulations including wearing a mask. In June 2020, the digital simulation specialist Ansys produced a video showing the projections of droplets from passengers with and without a mask. This simulation also incorporated complex physical models at the level of the air flows generated by the ventilation system of the plane.
