Time-reversed Impulse Response Haptic Demonstrator

The EPFL - LAI is investigating novel haptic technologies for rendering rich vibrotactile feedback in digital musical interfaces. The main objective is to develop an interactive surface that can render multitouch vibrotactile stimuli. As part of this research project, we are experimenting with different means to render vibrotactile feedback. For this particular semester project, we would like to explore the use of the time-reversal effect, in particular by sending the time-reversed impulse responses (TrlR) signal to a set of piezoelectric transducers bonded to a glass surface. This will allow us to obtain a localized peak in a set of predefined positions. At the same time, a 3D touch technology will be integrated to turn the haptic surface into a digital music instrument (DMl).