A Look Into The Future of Piracy: Sound Pirating a 3D Printed Object

Shared from Ars Technica: 

Let’s say the manufacturer up the street is making widgets with a 3D printer and you’d like to get in on that action. If you want to clone those coveted 3D objects, all you need is an audio recorder in the room with the printer. Using just the noises emitted by the printer’s stepper motors, you can replicate the object with up to 92% accuracy.
...A group of ‘cyber-physical systems researchers’ will present the hack next week at a conference devoted to cyber-physical systems in Vienna. It’s the next frontier in IP piracy, which could conceivably lead to a future Pirate Bay full of files that describe everything from the latest mobile device parts to human bones for transplant.