Experimental and computational studies of sound transmission in a branching airway network embedded in a compliant viscoelastic medium

    Authors

    Z. J. Dai; Y. Peng; H. A. Mansy; R. H. Sandler;T. J. Royston

    Comments

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    Abbreviated Journal Title

    J. Sound Vibr.

    Keywords

    MAGNETIC-RESONANCE ELASTOGRAPHY; LONGITUDINAL-WAVE PROPAGATION; MECHANICAL-PROPERTIES; RESPIRATORY SYSTEM; SHEAR STIFFNESS; MR; ELASTOGRAPHY; BREATH SOUNDS; LUNG SOUNDS; CHEST; MODEL; Acoustics; Engineering, Mechanical; Mechanics

    Abstract

    Breath sounds are often used to aid in the diagnosis of pulmonary disease. Mechanical and numerical models could be used to enhance our understanding of relevant sound transmission phenomena. Sound transmission in an airway mimicking phantom was investigated using a mechanical model with a branching airway network embedded in a compliant viscoelastic medium. The Horsfield self-consistent model for the bronchial tree was adopted to topologically couple the individual airway segments into the branching airway network The acoustics of the bifurcating airway segments were measured by microphones and calculated analytically. Airway phantom surface motion was measured using scanning laser Doppler vibrometry. Finite element simulations of sound transmission in the airway phantom were performed. Good agreement was achieved between experiments and simulations. The validated computational approach can provide insight into sound transmission simulations in real lungs. (C) 2014 Elsevier Ltd. All rights reserved.

    Journal Title

    Journal of Sound and Vibration

    Volume

    339

    Publication Date

    1-1-2015

    Document Type

    Article

    Language

    English

    First Page

    215

    Last Page

    229

    WOS Identifier

    WOS:000346849100015

    ISSN

    0022-460X

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