This table lists the investigated face masks, mask alternatives, and mask material (masks are depicted in Fig. 2). Masks marked with an asterisk (*) were tested by four speakers; all others were tested by one speaker.
Mask, name | Description |
1, “Surgical”* | Surgical mask, three layers |
2, “Valved N95” | N95 mask with exhalation valve |
3, “Knitted” | Knitted mask |
4, “PolyProp” | Two-layer polypropylene apron mask |
5, “Poly/cotton” | Cotton-polypropylene-cotton mask |
6, “MaxAT” | One-layer Maxima AT mask |
7, “Cotton2” | Two-layer cotton, pleated style mask |
8, “Cotton4” | Two-layer cotton, Olson style mask |
9, “Cotton3” | Two-layer cotton, pleated style mask |
10, “Cotton1” | One-layer cotton, pleated style mask |
11, “Neck Gaiter” | One-layer polyester/spandex, 0.022 g/cm2 |
12, “Bandana”* | Double-layer bandana, 0.014 g/cm2 |
13, “Cotton5”* | Two-layer cotton, pleated style mask |
14, “Fitted N95” | N95 mask, no exhalation valve, fitted |
“Swath” | Swath of mask material, polypropylene |
“None”* | Control experiment, no mask |