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| Location | Speed and direction |
| Over patient face | 0.224 m.s-1 downward |
| Over patient face in line with laryngoscopist's head | 0.422 m.s-1 downward |
| Over patient chest | 0.287 m.s-1 downward |
| Over patient chest in line with assistant's head | 0.556 m.s-1 downward |
| Behind laryngoscopist's enclosed face shield | 0.0853 m.s-1 sideways |
