Pulmonary Airway Area by the Two-microphone Acoustic Reflection Method

Journal of Applied Physiology, 1994

Authors: B. Louis, G. M. Glass, and J. J. Fredberg

Conclusion: “In summary, we have shown that the two-microphone method permits accurate measurement of human pulmonary airway area of breathing subjects. We established a high-pass filter signal- processing method that lessened artifacts associated with nonrigidity. This is important because it permits considerable simplification of the apparatus and the measurement procedures.”

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