Section: New Results

Preliminary design of a multi-touch ultrasonic tactile stimulator

Sofiane Ghenna, Christophe Giraud-Audine, Frédéric Giraud, Michel Amberg, Betty Lemaire-Semail

Currently there is no solution able to provide a multitouch tactile stimulation based on friction reduction tactile devices. The main objective of this work is to achieve a control method which allows to have a differentiated tactile stimulation on two fingers simultaneously, by superimposing two vibration modes. The proof of concept has been established on a 1D beam, where the tactile stimulation could be differentiated on two selected positions. We have presented the key design rules, as well as the control method. Finally, a psychophysical evaluation has shown that users can detect the location of nodes and antinodes of vibration with an average success rate of $78\%$