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Vibrotactile actuators, such as voice coils, represent effective and minimally intrusive solutions frequently employed in haptics to convey tactile information. In the category of voice coils, sound exciters present a range of advantages for wearable haptic systems due to their enhanced cost-effectiveness, compact dimensions, and widespread commercial availability. This research examines the feasibility of disk-shaped sound exciter actuators in wearable haptic applications, drawing a comparative analysis against conventional cylindrical voice coil actuators. The experimental protocol engaged seven participants in tasks involving tactile contact discrimination and surface roughness discrimination. Using established psychophysical methodologies, qualitative and quantitative approaches were employed to compute the Just Noticeable Difference (JND) and Absolute Threshold (AT). A comprehensive evaluation of the two distinct actuator types was realized through the devised protocol. Preliminary findings suggest that sound exciters hold potential as a plausible substitute for the more prevalent vibrotactile actuators in various practical haptic applications.

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Characterization of Sound Exciter Vibrotactile Actuators in Haptics Through Experimental Psychophysical Methods

  • 会议论文

  • 发表日期：

    2025年

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  • Alessia Silvia Ivani,
  • Manuel G. Catalano,
  • Simone Fani,
  • Giorgio Grioli,
  • Antonio Bicchi

摘要

Vibrotactile actuators, such as voice coils, represent effective and minimally intrusive solutions frequently employed in haptics to convey tactile information. In the category of voice coils, sound exciters present a range of advantages for wearable haptic systems due to their enhanced cost-effectiveness, compact dimensions, and widespread commercial availability. This research examines the feasibility of disk-shaped sound exciter actuators in wearable haptic applications, drawing a comparative analysis against conventional cylindrical voice coil actuators. The experimental protocol engaged seven participants in tasks involving tactile contact discrimination and surface roughness discrimination. Using established psychophysical methodologies, qualitative and quantitative approaches were employed to compute the Just Noticeable Difference (JND) and Absolute Threshold (AT). A comprehensive evaluation of the two distinct actuator types was realized through the devised protocol. Preliminary findings suggest that sound exciters hold potential as a plausible substitute for the more prevalent vibrotactile actuators in various practical haptic applications.