Experimental characterization of speech aerosol dispersion dynamics

Abstract Contact and inhalation of virions-carrying human aerosols represent the primary transmission pathway for airborne diseases including the severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2). Relative to sneezing and coughing, non-symptomatic aerosol-producing activities such as spea...

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Autores principales:	Zu Puayen Tan, Lokesh Silwal, Surya P. Bhatt, Vrishank Raghav
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/b59d5a8d4c334081a7c4da76a58a4b3e
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spelling	oai:doaj.org-article:b59d5a8d4c334081a7c4da76a58a4b3e2021-12-02T12:11:28ZExperimental characterization of speech aerosol dispersion dynamics10.1038/s41598-021-83298-72045-2322https://doaj.org/article/b59d5a8d4c334081a7c4da76a58a4b3e2021-02-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-83298-7https://doaj.org/toc/2045-2322Abstract Contact and inhalation of virions-carrying human aerosols represent the primary transmission pathway for airborne diseases including the severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2). Relative to sneezing and coughing, non-symptomatic aerosol-producing activities such as speaking are highly understudied. The dispersions of aerosols from vocalization by a human subject are hereby quantified using high-speed particle image velocimetry. Syllables of different aerosol production rates were tested and compared to coughing. Results indicate aerosol productions and penetrations are not correlated. E.g. ‘ti’ and ‘ma’ have similar production rates but only ‘ti’ penetrated as far as coughs. All cases exhibited a rapidly penetrating “jet phase” followed by a slow “puff phase.” Immediate dilution of aerosols was prevented by vortex ring flow structures that concentrated particles toward the plume-front. A high-fidelity assessment of risks to exposure must account for aerosol production rate, penetration, plume direction and the prevailing air current.Zu Puayen TanLokesh SilwalSurya P. BhattVrishank RaghavNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-12 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Zu Puayen Tan Lokesh Silwal Surya P. Bhatt Vrishank Raghav Experimental characterization of speech aerosol dispersion dynamics
description	Abstract Contact and inhalation of virions-carrying human aerosols represent the primary transmission pathway for airborne diseases including the severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2). Relative to sneezing and coughing, non-symptomatic aerosol-producing activities such as speaking are highly understudied. The dispersions of aerosols from vocalization by a human subject are hereby quantified using high-speed particle image velocimetry. Syllables of different aerosol production rates were tested and compared to coughing. Results indicate aerosol productions and penetrations are not correlated. E.g. ‘ti’ and ‘ma’ have similar production rates but only ‘ti’ penetrated as far as coughs. All cases exhibited a rapidly penetrating “jet phase” followed by a slow “puff phase.” Immediate dilution of aerosols was prevented by vortex ring flow structures that concentrated particles toward the plume-front. A high-fidelity assessment of risks to exposure must account for aerosol production rate, penetration, plume direction and the prevailing air current.
format	article
author	Zu Puayen Tan Lokesh Silwal Surya P. Bhatt Vrishank Raghav
author_facet	Zu Puayen Tan Lokesh Silwal Surya P. Bhatt Vrishank Raghav
author_sort	Zu Puayen Tan
title	Experimental characterization of speech aerosol dispersion dynamics
title_short	Experimental characterization of speech aerosol dispersion dynamics
title_full	Experimental characterization of speech aerosol dispersion dynamics
title_fullStr	Experimental characterization of speech aerosol dispersion dynamics
title_full_unstemmed	Experimental characterization of speech aerosol dispersion dynamics
title_sort	experimental characterization of speech aerosol dispersion dynamics
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/b59d5a8d4c334081a7c4da76a58a4b3e
work_keys_str_mv	AT zupuayentan experimentalcharacterizationofspeechaerosoldispersiondynamics AT lokeshsilwal experimentalcharacterizationofspeechaerosoldispersiondynamics AT suryapbhatt experimentalcharacterizationofspeechaerosoldispersiondynamics AT vrishankraghav experimentalcharacterizationofspeechaerosoldispersiondynamics
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Experimental characterization of speech aerosol dispersion dynamics

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