Fundamentals of Wearable Computers and Augmented Reality, 2nd Edition

232 Fundamentals of Wearable Computers and Augmented Reality

by adding synthetic force to a passive haptic response for a panel control task (Borst

and Volz 2005). Their results showed that mixed force feedback was better than syn-

thetic force alone in terms of task performance and user preference. In vMR-hMR,

both modalities rely on mixed stimuli. Ha etal. installed a vibrator in a real tangible

prop to produce virtual vibrotactile sensations in addition to the real haptic informa-

tion of the prop in a visually mixed environment (Ha etal. 2007). They demonstrated

that the virtual vibrotactile feedback enhances immersion for an AR-based handheld

game. Bayart etal. introduced a teleoperation framework where force measured at

the remote site ...