Abstract:Although the rate of wearing masks has increased to 97.9%, there is a possibility that a gap between mask and face may occur because it does not completely fit to face, or that the virus may spread due to the poor performance of the mask. Accordingly, many studies are being conducted to evaluate performance of masks, or to measure the flow rate of coughing with PIV (Particle Image Velocimetry). However, most of these studied the performance inside or on the surface of a mask, and research on particle emitting … Show more
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