Effect of Mouthpiece, Nose Clips, and Head Position on Airway Area Measured by Acoustic Reflections

Journal of Applied Physiology, 1987

Authors: I. Rubinstein, P.A. McClean, R. Boucher, N. Zamel, J.J. Fredberg, and V. Hoffstein

Conclusion: “Acoustic reflection technique is so far the only relatively simple, noninvasive, reproducible, and inexpensive technique that permits the measurements of upper airway anatomy under dynamic conditions.”