Author: Barreda, Santiago; Asadi, Sima; Cappa, Christopher D.; Wexler, Anthony S.; Bouvier, Nicole M.; Ristenpart, William D.
Title: The Impact of Vocalization Loudness on COVID-19 Transmission in Indoor Spaces Cord-id: 9cr4sxik Document date: 2020_9_9
ID: 9cr4sxik
Snippet: There have been several documented outbreaks of COVID-19 associated with vocalization, either by speech or by singing, in indoor confined spaces. Here, we model the risk of in-room airborne disease transmission via expiratory particle emission versus the average loudness of vocalization and for variable room ventilation rates. The model indicates that a 6-decibel reduction in average vocalization intensity yields a reduction in aerosol transmission probability equivalent to doubling the room ven
Document: There have been several documented outbreaks of COVID-19 associated with vocalization, either by speech or by singing, in indoor confined spaces. Here, we model the risk of in-room airborne disease transmission via expiratory particle emission versus the average loudness of vocalization and for variable room ventilation rates. The model indicates that a 6-decibel reduction in average vocalization intensity yields a reduction in aerosol transmission probability equivalent to doubling the room ventilation rate. The results suggest that public health authorities should consider implementing"quiet zones"in high-risk indoor environments, such as hospital waiting rooms or dining facilities, to mitigate transmission of COVID-19 and other airborne respiratory diseases.
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