Low-cost measurement of face mask efficacy for filtering expelled droplets during speech

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The global spread of COVID-19 in early 2020 has significantly increased the demand for face masks around the world while stimulating research about their efficacy. Here we adapt a re- recently demonstrated optical imaging approach and highlight stark differences in the effectiveness of different masks and mask alternatives to suppress the spread of respiratory droplets during regular speech.

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Fischer-2020-Efficacy-Measurements-of-Masks.pdf

Author(s)

  • Emma P. Fischer, Department of Psychology & Neuroscience, Duke University, Durham, NC 27708, USA.
  • Martin C. Fischer, Department of Chemistry, Duke University, Durham, NC 27708, USA; Department of Physics, Duke University, Durham, NC 27708, USA

Collaborator(s)

  • David Grass, Department of Chemistry, Duke University, Durham, NC 27708, USA
  • Isaac Henrion, Cover Durham, Durham, NC 27701, USA
  • Warren S. Warren, Department of Chemistry, Duke University, Durham, NC 27708, USA; Department of Physics, Duke University, Durham, NC 27708, USA; Department of Radiology, Duke University School of Medicine, Durham, NC 27710, USA; Department of Biomedical Engineering, Duke University, Durham, NC 27708, USA
  • Eric Westman, Department of Medicine, Duke University School of Medicine, Durham, NC 27708, USA.

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