iPhone Stethoscope Attachment

*NOTE: this Thing is designed for printing on a non-shrinking printer (ie through Shapeways, etc). For a MakerBot-friendly, earlier version, see:
http://www.thingiverse.com/thing:14663*

A friction-fit cap for the bottom of the iPhone 4/5 that allows a stethoscope to be attached and recorded using the built-in microphone.

As the sound passes through the rubber stethoscope tubing, it is funneled directly to the mic at the bottom of the phone.

A quick test recording can be heard here:
https://soundcloud.com/jeffthompson/3d-printed-iphone-stethoscope