This is the supplemental material for the paper "Effect of wavy trachea walls on the oscillation onset pressure of silicone vocal folds".
The MP4-video shows how a human trachea that is streched and compressed forms ripples on the inner walls.
The subfolders contain the (Inventor) CAD files and STL geometry files that were used to 3D-print the parts of the experimental setup and the vocal folds. Details are provided in the paper.
