Figure 10

One of the twelve 3D-printed tests faces (a) with the air pressure sensor tube installed and (b) a surgical mask, (c) an FFP2 mask, (d) a statistically shaped mask, and (e) a personalized mask.
One of the twelve 3D-printed tests faces (a) with the air pressure sensor tube installed and (b) a surgical mask, (c) an FFP2 mask, (d) a statistically shaped mask, and (e) a personalized mask.