Mask speech transmission test
In which I wear a series of different kinds of masks and speak the Harvard Sentences (http://www.cs.columbia.edu/~hgs/audio...) into a microphone to evaluate their effect on my voice.
00:00-00:38: No mask
00:38-01:16: 2-layer cotton mask by Transit Supply (https://transit.supply/)
01:16-01:54: 3-layer cotton mask by me
01:54-02:28: KN95, vertical-fold style, by Omey, bought at Discount Builders Supply
02:28-03:03: KN95, three-panel/KF94 style, by Rorze, bought at Costco Business Center
03:03-03:38: N95, valved, bought at Home Depot
03:38-04:17: N95, valved, covered with the Transit Supply 2-layer cotton mask
04:17-04:54: N95, solid/unvalved
04:54-05:33: No mask (reprise)