DescriptionFlow visualization of an N95 respirator with and without an exhalation valve using schlieren imaging and light scattering (mannequin).jpg
English: Still images extracted from the video footage of the mannequin exhaling with an exhalation valve (left), no exhalation valve (center), and no mask (right).
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Captions
mannequin exhaling with an exhalation valve (left), no exhalation valve (center), and no mask (right)