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The effect of facial expressions on respirators contact pressures

Author

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  • Mang Cai
  • Shengnan Shen
  • Hui Li

Abstract

This study investigated the effect of four typical facial expressions (calmness, happiness, sadness and surprise) on contact characteristics between an N95 filtering facepiece respirator and a headform. The respirator model comprised two layers (an inner layer and an outer layer) and a nose clip. The headform model was comprised of a skin layer, a fatty tissue layer embedded with eight muscles, and a skull layer. Four typical facial expressions were generated by the coordinated contraction of four facial muscles. After that, the distribution of the contact pressure on the headform, as well as the contact area, were calculated. Results demonstrated that the nasal clip could help make the respirator move closer to the nose bridge while causing facial discomfort. Moreover, contact areas varied with different facial expressions, and facial expressions significantly altered contact pressures at different key areas, which may result in leakage.

Suggested Citation

  • Mang Cai & Shengnan Shen & Hui Li, 2017. "The effect of facial expressions on respirators contact pressures," Computer Methods in Biomechanics and Biomedical Engineering, Taylor & Francis Journals, vol. 20(10), pages 1122-1131, July.
    • Handle: RePEc:taf:gcmbxx:v:20:y:2017:i:10:p:1122-1131
    DOI: 10.1080/10255842.2017.1336549
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