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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. \u2018ti\u2019 and \u2018ma\u2019 have similar production rates but only \u2018ti\u2019 penetrated as far as coughs. All cases exhibited a rapidly penetrating \u201cjet phase\u201d followed by a slow \u201cpuff phase.\u201d 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.<\/jats:p>","DOI":"10.1038\/s41598-021-83298-7","type":"journal-article","created":{"date-parts":[[2021,2,19]],"date-time":"2021-02-19T16:46:37Z","timestamp":1613753197000},"update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":35,"title":["Experimental characterization of speech aerosol dispersion dynamics"],"prefix":"10.1038","volume":"11","author":[{"given":"Zu Puayen","family":"Tan","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Lokesh","family":"Silwal","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Surya P.","family":"Bhatt","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Vrishank","family":"Raghav","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"297","published-online":{"date-parts":[[2021,2,17]]},"reference":[{"key":"83298_CR1","doi-asserted-by":"publisher","first-page":"557","DOI":"10.1038\/s41586-020-2271-3","volume":"582","author":"Y Liu","year":"2020","unstructured":"Liu, Y. et al. 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