Fig. 5: Electrotactile haptic system with interference stimulation. | Nature Communications

Fig. 5: Electrotactile haptic system with interference stimulation.

From: Interference haptic stimulation and consistent quantitative tactility in transparent electrotactile screen with pressure-sensitive transistors

Fig. 5

a Schematic of interference stimulation in electrotactile system. An Ag/Cl patch is affixed above the skin surface to measure the electrical potential differences. b Electrical potential signals measured based on the type of electrotactile stimulation. c Perception test corresponding to the type and frequency of electrotactile stimulation. d Variations in the tactile intensity when the current density adjusted. e Variations in the tactile texture when the offset frequency modified. f Threshold current density required to reach the “Perceptible” level when altering the frequency of the single stimulus and the offset frequency of the interference stimulation. g Precepted tactile intensity level for single stimulation and interference stimulation as a function of the finger pressure level. h Different threshold current density required to reach the “Perceptible” level at each pressure level. Data in d, e and f are presented as mean ± SEM.

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