Full paper: Airflow dynamics of coughing and sneezing in healthy human volunteers from shadowgraph imaging: An aid to aerosol infection control
Tang, J.W. Nicolle, A. Pantelic, J. Koh, G.C. De Wang, L. Amin, M. Klettner, C.A. Cheong, D.K.W. Sekhar, C. Tham, K.W.
Tang, J.W.
Nicolle, A.
De Wang, L.
Amin, M.
Klettner, C.A.
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Alternative Title
Abstract
Real-time, non-invasive, shadowgraph imaging was used to estimate airflow dynamic parameters for coughing and sneezing in healthy human volunteers. For coughing, 20 healthy volunteers (10 women, mean age 32.2±12.9 years; 10 men, mean age 25.3±2.5 years) were recruited. For the 10 females: maximum cough propagation distances=0.15-0.5m, maximum velocities=2.2-5.5m/s, maximum 2-D projected areas=0.015-0.070m2, maximum 2-D projected area expansion rates=0.2-0.6m2/s. For the 10 males: maximum cough propagation distances=0.3-0.6m, maximum velocities=3.4-17m/s, maximum 2-D projected areas=0.04- 0.13m2, maximum expansion rates=0.3-1.5m 2/s. For sneezing, only four male volunteers were able to sneeze reliably and repeatedly with the black pepper stimulus: Case 1 (21-years, one sneeze), Case 2 (21-years, three sneezes), Case 3 (32-years, two sneezes), Case 4 (43-years, three sneezes): maximum sneeze propagation distances=0.2-0.6m, maximum velocities=0.8- 4.5m/s, maximum 2-D projected areas=0.03-0.18m 2, maximum expansion rates=0.3-1.4m2/s. Surprisingly, in this healthy volunteer cohort, with this experimental approach, maximum exit velocities were fairly similar for both coughing and sneezing.
Keywords
Aerosol, Infectious disease, Inhalation, Other respiratory, Transmission
Source Title
10th International Conference on Healthy Buildings 2012
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Series/Report No.
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Date
2012
DOI
Type
Conference Paper