This article had me at pneumotachometers (emphasis mine):
> Unno used a pair of pneumotachometers (instruments to measure volume flow of respired gases) in parallel for his experiments to determine the velocity, volume, and time scale of blowing through each side of the nose over 60 trials.
> Unno used a pair of pneumotachometers (instruments to measure volume flow of respired gases) in parallel for his experiments to determine the velocity, volume, and time scale of blowing through each side of the nose over 60 trials.