| Autor: |
Kai Man Alexander Ho, Hywel Davies, Ruth Epstein, Paul Bassett, Áine Hogan, Yusuf Kabir, John Rubin, Gee Yen Shin, Jonathan P. Reid, Ryo Torii, Manish K. Tiwari, Ramanarayanan Balachandran, Laurence B. Lovat |
| Jazyk: |
angličtina |
| Rok vydání: |
2021 |
| Předmět: |
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| Zdroj: |
Scientific Reports, Vol 11, Iss 1, Pp 1-11 (2021) |
| Druh dokumentu: |
article |
| ISSN: |
2045-2322 |
| DOI: |
10.1038/s41598-021-03519-x |
| Popis: |
Abstract COVID-19 has restricted singing in communal worship. We sought to understand variations in droplet transmission and the impact of wearing face masks. Using rapid laser planar imaging, we measured droplets while participants exhaled, said ‘hello’ or ‘snake’, sang a note or ‘Happy Birthday’, with and without surgical face masks. We measured mean velocity magnitude (MVM), time averaged droplet number (TADN) and maximum droplet number (MDN). Multilevel regression models were used. In 20 participants, sound intensity was 71 dB for speaking and 85 dB for singing (p 85% reduction wearing face masks. Droplet transmission varied widely, particularly for singing. Masks decreased TADN by 99% (p |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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