Leakage versus Material Filtration in Barrier Facemask Efficiency

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