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Mask With Three Layers Most Effective Against Cough Droplets by Anjanee Sharma on March 6, 2021 at 7:19 PM
Researchers find that three layered surgical masks are the most effective against large respirator droplets from cough or sneeze. Prior research has shown that three layers also prevent small particles from passing through the mask pores.
Large cough droplets can pass through the single and double layered masks and atomize to much smaller droplets (aerosols). Aerosols can linger in the air for longer periods of time.
The researchers used a droplet generator (to alter the size and speed of the droplet) and a high-speed time-lapse camera to carry out the experiment.