Please use this identifier to cite or link to this item: https://scholarbank.nus.edu.sg/handle/10635/114090
Title: Shadowgraph imaging and quantitative analysis of human exhaled airflows whilst counting in English and Mandarin - Potential risks for cross-infection
Authors: Jiang, M.
Nicolle, A.
Klettner, C.
Pantelic, J. 
De Wang, L.
Suhaimi, A.B.
Tham, K.W. 
Tang, J.W.
Keywords: Distance
Language
Risk
Speaking
Velocity
Issue Date: 2012
Citation: Jiang, M.,Nicolle, A.,Klettner, C.,Pantelic, J.,De Wang, L.,Suhaimi, A.B.,Tham, K.W.,Tang, J.W. (2012). Shadowgraph imaging and quantitative analysis of human exhaled airflows whilst counting in English and Mandarin - Potential risks for cross-infection. 10th International Conference on Healthy Buildings 2012 2 : 1261-1266. ScholarBank@NUS Repository.
Abstract: Real-time shadowgraph images were captured (at 500 frames per second at 1024x1024 pixel resolution) of 5 volunteers with bilingually fluent (English, Mandarin) counting, slowly from 1 to 10 in English and Mandarin Chinese. The exhaled flows produced by speaking each number were recorded as a series of 2-dimensional TIF images. Every 5 frames was digitised using Engauge Digitising software (http://digitizer.sourceforge.net/), where the visible borders of the exhaled airflows were converted into a series of x-y coordinates from which progressive distance of dissemination was estimated over time. Individual numbers: '2', '3' and '10', spoken in English produced airflows that travelled further than the same numbers spoken in Mandarin. Counting numbers '4', '5', '9' in English and '2', '10' in Mandarin produce airflows of longer duration than the other numbers in these two languages, respectively. This approach can identify utterances in different languages that can pose potential hazards for aerosol-transmitted infections.
Source Title: 10th International Conference on Healthy Buildings 2012
URI: http://scholarbank.nus.edu.sg/handle/10635/114090
ISBN: 9781627480758
Appears in Collections:Staff Publications

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