Low-cost measurement of facemask efficacy for filtering expelled droplets during speech

Low-cost measurement of facemask efficacy for filtering expelled droplets during speech

https://advances.sciencemag.org/content/early/2020/08/07/sciadv.abd3083

Neck gaitors worse than no mask at all. Bandanas, knitted masks, and masks with vents are worthless or nearly so. But lets lump them all together, after all this is not science, this is a religious crusade.

Bottom line: if your breath isn’t restricted, your mask isn’t doing anything.

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