The Vibrative Virtual invisible iPhone Keyboard by Florian Kräutli reads vibrations, allowing you to turn any surface into a keyboard… How? By using the iPhone’s built-in three-dimensional accelerometer and an application that translates vibrations from different surfaces caused by tapping. Reflected onto a paper keyboard as guidelines, the app is then calibrated using special software, where a program generates a series of defined patterns using the frequencies collected from the data. From this, each different vibration is then converted as a simulated key press on the ‘Invisible Keyboard’. Watch a video and see more images below.