Section: New Results

Physical and Perceptual Independence of Ultrasonic Vibration and Electrovibration for Friction Modulation

Eric Vezzoli, Wael Ben Messaoud, Michel Amberg, Betty Lemaire-Semail, Frédéric Giraud, Marie-Ange Bueno

Two different principles are available to modulate the user perceived roughness of a surface: electrovibration and ultrasonic vibration of a plate. The former enhances the perceived friction coefficient and the latter reduces it. In this work, we highlighted the independence of the two effects on the physical and perceptual point of view to confirm the increased range of sensation that can be supplied by the two coupled techniques. Firstly, a tribometric analysis of the induced lateral force on the finger by the two coupled effects has been achieved, then a study on the dynamic of the two effects is reported. In the end, a psychophysical experiment on the perception of the two coupled techniques confirms the approach.