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Leakage versus Material Filtration in Barrier Facemask Efficiency


Leakage versus Material Filtration in Barrier Facemask Efficiency

Bahloul, Ali ORCID: https://orcid.org/0000-0002-4597-2001, Brochot, Clothilde ORCID: https://orcid.org/0000-0002-2431-5053 and Layne, Barbara ORCID: https://orcid.org/0000-0003-3606-0673 (2021) Leakage versus Material Filtration in Barrier Facemask Efficiency. Health, 13 (4). pp. 439-453. ISSN 1949-5005

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Leakage Versus Material Filtration.pdf - Published Version
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Official URL: https://doi.org/10.4236/health.2021.134035


The World Health Association and many governmental agencies recommend the wearing of facemasks by the general public to prevent the spread of COVID-19. It is believed that masks can significantly protect others and may offer some protection to the wearer. Although there are standards for FFRs, surgical masks, and recently for barrier face coverings, they all indicate the level of protection for the wearer. However, testing facial masks not at the point of inhalation, but at the source, the exhale, offers a new perspective on how to impede particle emissions. In this paper, the experimental results show that, although the barrier face covering is less effective than FFRs or surgical masks, it can reduce the concentration of aerosols downstream of the device. The results on barrier efficiency show a rapid decrease in effectiveness when the face covering is not sealed to the head. The barrier efficiency of two of the barrier face coverings tested is strongly dependent on leakage caused by the fit rather than the material. While some materials certainly are more ef-fective than others in inhibiting particle penetration, an even more profound factor is the amount of leakage emitted from a mask. New approaches to fit and design in order to create a seal against leakage will become an important factor in combatting SARS-CoV-2.

Divisions:Concordia University > Gina Cody School of Engineering and Computer Science > Building, Civil and Environmental Engineering
Item Type:Article
Authors:Bahloul, Ali and Brochot, Clothilde and Layne, Barbara
Journal or Publication:Health
Date:April 2021
  • IRSST (Institut de recherché Robert Sauvé en Santé et en sécurité du Travail)
Digital Object Identifier (DOI):10.4236/health.2021.134035
Keywords:COVID-19, Facemask, Filtration, Leakage, Aerosol, Airborne Transmission
ID Code:988328
Deposited On:05 May 2021 20:04
Last Modified:05 May 2021 20:04
Related URLs:


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