The fastest recorded speed of particles expelled during a human sneeze is 167 km/h (103.6 mph).
While various sources cite speeds ranging from 50 mph to even a highly improbable 224 mph, the most credible measurement, supported by Guinness World Records, confirms a maximum speed of 167 km/h (103.6 mph). This speed refers to the velocity of expelled droplets or particles, not necessarily the speed of the air itself within the sneeze.
Understanding Sneeze Velocity
Several studies, like the one published in 2013 ("Airflow Dynamics of Human Jets: Sneezing and Breathing - Potential for Disease Transmission") utilizing high-speed imaging, helped in understanding the mechanics of sneezing and airflow dynamics. However, precisely measuring the peak speed consistently proves challenging due to the complex and highly variable nature of sneezes. Factors such as individual physiology, the irritant causing the sneeze, and the measurement techniques employed all influence the recorded speed.
Why Different Numbers Exist
The discrepancy in reported speeds stems from several factors:
- Different Measurement Methods: Different research methodologies may yield varying results. Some studies might focus on the overall expelled air, while others focus on the velocity of individual droplets.
- Variability in Sneezes: Sneezes are not uniform events; their force and velocity vary significantly depending on the individual and the circumstances.
- Exaggerated Claims: Some sources may report exaggerated speeds based on estimations or older, less precise studies.
Therefore, while anecdotal evidence and older estimations may suggest higher speeds, the scientifically supported and most reliable measurement currently available is 167 km/h (103.6 mph).
