They put a smartphone next to a keyboard, and they had people type, and then their goal was to use the vibrations that were created by typing to measure the change in the accelerometer reading to determine what the person had been typing.
De placerede en smartphone  ved siden af keyboardet, og de havde folk til at taste og deres mål var at bruge vibrationerne som var skabt ved at taste til at måle ændringer i accelerometeret for at bestemme hvad person skrev.