Effects of surgical masks on aerosol dispersion in professional singing
Open Access
- 5 October 2021
- journal article
- research article
- Published by Springer Science and Business Media LLC in Journal of Exposure Science & Environmental Epidemiology
- Vol. 32 (5), 727-734
- https://doi.org/10.1038/s41370-021-00385-7
Abstract
Background In the CoVID-19 pandemic, singing came into focus as a high-risk activity for the infection with airborne viruses and was therefore forbidden by many governmental administrations. Objective The aim of this study is to investigate the effectiveness of surgical masks regarding the spatial and temporal dispersion of aerosol and droplets during professional singing. Methods Ten professional singers performed a passage of the Ludwig van Beethoven’s “Ode of Joy” in two experimental setups—each with and without surgical masks. First, they sang with previously inhaled vapor of e-cigarettes. The emitted cloud was recorded by three cameras to measure its dispersion dynamics. Secondly, the naturally expelled larger droplets were illuminated by a laser light sheet and recorded by a high-speed camera. Results The exhaled vapor aerosols were decelerated and deflected by the mask and stayed in the singer’s near-field around and above their heads. In contrast, without mask, the aerosols spread widely reaching distances up to 1.3 m. The larger droplets were reduced by up to 86% with a surgical mask worn. Significance The study shows that surgical masks display an effective tool to reduce the range of aerosol dispersion during singing. In combination with an appropriate aeration strategy for aerosol removal, choir singers could be positioned in a more compact assembly without contaminating neighboring singers all singers.Keywords
This publication has 55 references indexed in Scilit:
- Recognition of aerosol transmission of infectious agents: a commentaryBMC Infectious Diseases, 2019
- Transmission routes of respiratory viruses among humansCurrent Opinion in Virology, 2018
- Aeroacoustic analysis of the human phonation process based on a hybrid acoustic PIV approachExperiments in Fluids, 2017
- Evaluation of rebreathed air in human nasal cavity with N95 respirator: a CFD studyTrauma and Emergency Care, 2016
- Violent expiratory events: on coughing and sneezingJournal of Fluid Mechanics, 2014
- Simulation and Evaluation of Respirator Faceseal Leaks Using Computational Fluid Dynamics and Infrared ImagingThe Annals of Occupational Hygiene, 2012
- Electronic cigarette aerosol particle size distribution measurementsInhalation Toxicology, 2012
- A schlieren optical study of the human cough with and without wearing masks for aerosol infection controlJournal of The Royal Society Interface, 2009
- Size distribution and sites of origin of droplets expelled from the human respiratory tract during expiratory activitiesJournal of Aerosol Science, 2009
- Characterization of expiration air jets and droplet size distributions immediately at the mouth openingJournal of Aerosol Science, 2009