It’s done! After some more wrangling with shrinkage, my stethoscope attachment for the iPhone is complete. The MakerBot-printed piece slides onto the bottom of the phone and the stethoscope tube runs inside, allowing you to record sounds directly into the iPhone’s mics.
The part was printed in two pieces and welded together with plastic cement (which worked great on the MakerBot ABS). The fit is tight but doesn’t feel like it would damage the phone’s surfaces.
The sound is piped into the two mics by an internal chamber. Note the stop at the bottom hole – this prevents the stethoscope tube from being inserted too far and blocking the sound! Total build time was around 40-minutes per half, or about 90 minutes total counting GCode generation.
Files to be uploaded to Thingiverse later today
Now available for download on Thingiverse!