Evaluation of the air leakage around facial masks in view of effective aerosol protection using thermal imaging and modeling

Rudolf M. Verdaasdonk; Jelle Room; Frans de Jongh

doi:10.1117/12.2649899

6 March 2023 Evaluation of the air leakage around facial masks in view of effective aerosol protection using thermal imaging and modeling

Rudolf M. Verdaasdonk, Jelle Room, Frans de Jongh

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Proceedings Volume PC12370, Design and Quality for Biomedical Technologies XVI; PC1237009 (2023) https://doi.org/10.1117/12.2649899
Event: SPIE BiOS, 2023, San Francisco, California, United States

Abstract

Facial masks are assumed to provide protection against aerosols and droplets but can leak due to poor fit which reduces the effectiveness against transmission of Covid19. A theoretical model was developed to predict the leakage around facial mask and the results were compared to leakage measurements using thermal imaging on various facial mask types. All tested masks showed leakage of exhaled air along the gaps at the rim of the mask due to the high resistance of the mask filter material. The experimental data was relatively in good agreement with the theoretical ‘simplified’ model. Common types of facial masks are not effective in filtering aerosols but do block droplets.

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Rudolf M. Verdaasdonk, Jelle Room, and Frans de Jongh "Evaluation of the air leakage around facial masks in view of effective aerosol protection using thermal imaging and modeling", Proc. SPIE PC12370, Design and Quality for Biomedical Technologies XVI, PC1237009 (6 March 2023); https://doi.org/10.1117/12.2649899

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KEYWORDS

Aerosols

Atmospheric modeling

Thermal modeling

Thermography

Image filtering

Mask making

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