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Background: Pulmonary auscultation is a common tool for diagnosing variousrespiratory diseases. Previous studies have documented many details ofpulmonary sounds in humans. However, information on sound generation andpressure loss inside animal airways is scarce. Since the morphology of animalairways can be significantly different from human, the characteristics ofpulmonary sounds and pressure loss inside animal airways can be different.Objective: The objective of this study is to investigate the sound and staticpressure loss measured at the trachea of a miniature pig airway tree modelbased on the geometric details extracted from physical measurements. Methods:In the current study, static pressure loss and sound generation measured in thetrachea was documented at different flow rates of a miniature pig airway tree.Results: Results showed that the static pressure and the amplitude of therecorded sound at the trachea increased as the flow rate increased. Thedominant frequency was found to be around 1840-1870 Hz for flow rates of0.2-0.55 lit/s. Conclusion: The results suggested that the dominant frequencyof the measured sounds remained similar for flow rates from 0.20 to 0.55 lit/s.Further investigation is needed to study sound generation under different inletflow and pulsatile flow conditions.

Pressure Loss and Sound Generated In a Miniature Pig Airway Tree Model