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. 2013 Jan 12;57(6):740–757. doi: 10.1093/annhyg/mes108

Fig. 7.

Fig. 7.

Upstream critical areas, within which all particles in the freestream will be inhaled, for (a) 7 µm and (b) 82 µm aerodynamic diameter particles injected into the freestream of 0.4 m s−1 with mouth inhalation velocity equivalent to moderate breathing (4.33 m s−1).