Touch and Go — Designing Haptic Feedback for a Hand-Held Mobile Device
BT Technology Journal
Waypoint navigation with a vibrotactile waist belt
ACM Transactions on Applied Perception (TAP)
HCI Beyond the GUI: Design for Haptic, Speech, Olfactory, and Other Nontraditional Interfaces
HCI Beyond the GUI: Design for Haptic, Speech, Olfactory, and Other Nontraditional Interfaces
Vibrotactile Glove guidance for semi-autonomous wheelchair operations
Proceedings of the 46th Annual Southeast Regional Conference on XX
HAPTICS'04 Proceedings of the 12th international conference on Haptic interfaces for virtual environment and teleoperator systems
Detecting vibrations across the body in mobile contexts
Proceedings of the SIGCHI Conference on Human Factors in Computing Systems
WAPA: a wearable framework for aerobatic pilot aid
3DPH'09 Proceedings of the 2009 international conference on Modelling the Physiological Human
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Efforts are under way to develop a wearable haptic display that can impart directional information on a user's back for situation awareness. To date, two studies have been conducted aboard the NASA KC-135A reduced gravity aircraft to investigate the perception of tactile information in altered-gravity environments. This paper reports our results on perceived loudness of vibrotactile stimulation under different gravity conditions. Subjects compared seven fixed-frequency varying-amplitude vibrations in 1.8-g to a reference vibration delivered in zero-g using the method of constant stimuli. Our results show that the points of subjective equality (PSE) measured in 1.8-g are essentially the same as the intensity of the reference signal delivered in zero-g. The difference between PSE and the reference is less than the difference threshold (DL) measured in 1.8-g. We also found that the displacements (measured with an accelerometer) produced by our tactors in one-g and zero-g conditions are the same using identical driving waveforms. Our data suggest that the perceived loudness of vibrotactile stimuli remains the same in altered-gravity environments. However, a user's ability to interpret vibrotactile signals in zero-g environment may be hampered by increased cognitive load due to the need to continuously monitor the position and movement of one's body.