Experimental Studies of Hydraulic Losses and Carbon Dioxide Concentration in the Space Under the Face Mask Protecting Against COVID-19

Masks are the primary tool used to prevent spread of COVID-19 in current pandemic. Tests were carried out determine total pressure drop through materials from which masks made and correlation these results with concentration carbon dioxide inner space mask. The showed that a parameter representing hydraulic losses mask material has significant influence on higher resistances accumulated dioxide, generated greater fluctuations as function time, may be caused by compensation respiratory system. For example, two-layer (mask no. 3) resistance values about three times than single-layer 1). study also noticed inscriptions prints placed increase made, contribute accumulation between face. To reduce within mask, this work suggest searching for lowest possible resistance.