Droplets expelled during human expiratory activities and their origin

Morawska, Lidia, Johnson, Graham R., Ristovski, Zoran, Hargreaves, Megan, Mengersen, Kerrie L., Chao, Christopher, Wan, Man Pun, Li, Yuguo, Xie, Xaiojan, & Katoshevski, David (2008) Droplets expelled during human expiratory activities and their origin. In 11th International Conference on Indoor Air Quality and Climate, 17th August to 22nd August 2008, Copenhagen, Denmark.


This paper presents the findings of the most comprehensive program of study to date aimed at quantifying the number, size distribution and evaporation of droplets produced during virtually any expiratory activity. This international research program included teams of investigators from a number of universities, with each group contributing to essential aspects of the research. This research revealed many previously unknown aspects of expiratory aerosol dynamics and characteristics. This paper will focus on the findings that the time taken for expiratory droplets to achieve short term equilibrium is comparable to that for pure water droplets and that the droplet size distributions have distinct features reflecting specific production mechanisms whose intensity varies with the nature of the activity.

Impact and interest:

Citation counts are sourced monthly from Scopus and Web of Science® citation databases.

These databases contain citations from different subsets of available publications and different time periods and thus the citation count from each is usually different. Some works are not in either database and no count is displayed. Scopus includes citations from articles published in 1996 onwards, and Web of Science® generally from 1980 onwards.

Citations counts from the Google Scholar™ indexing service can be viewed at the linked Google Scholar™ search.

Full-text downloads:

545 since deposited on 31 Oct 2008
25 in the past twelve months

Full-text downloads displays the total number of times this work’s files (e.g., a PDF) have been downloaded from QUT ePrints as well as the number of downloads in the previous 365 days. The count includes downloads for all files if a work has more than one.

ID Code: 15416
Item Type: Conference Paper
Refereed: Yes
Additional URLs:
Keywords: Expiratory Aerosols, Droplet Evaporation, Mucus, Size Distribution, UVAPS
Subjects: Australian and New Zealand Standard Research Classification > EARTH SCIENCES (040000) > ATMOSPHERIC SCIENCES (040100) > Atmospheric Sciences not elsewhere classified (040199)
Divisions: Past > QUT Faculties & Divisions > Faculty of Science and Technology
Current > Institutes > Institute of Health and Biomedical Innovation
Copyright Owner: Copyright 2008 (please consult author)
Deposited On: 31 Oct 2008 00:00
Last Modified: 29 Feb 2012 13:52

Export: EndNote | Dublin Core | BibTeX

Repository Staff Only: item control page