Abstract
Actuator density is an important parameter in the design of vibrotactile displays. When it comes to obstacle detection or navigation tasks, a high number of tactors may provide more information, but not necessarily better performance. Depending on the body site and vibration parameters adopted, high density can make it harder to detect tactors in an array. In this paper, we explore the trade-off between actuator density and precision by comparing three kinds of directional cues. After performing a within-subject naive search task using a head-mounted vibrotactile display, we found that increasing the density of the array locally provides higher performance in detecting directional cues.
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Such metaphor is also used to explain the behavioral focus of the star-nosed mole’s snout. The snout of the star-nosed mole (Condylura cristata) has a “fovea” at the center, used for detailed explorations of objects of interest [2].
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Therm used by Jan van Erp to contrast the range covered by a tactile array and the human field of view [6].
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Acknowledgments
This study is partly supported by the Ligurian PAR-FAS grant Glassense (CUP G35C13001360001) and EU FP7 grant BLINDPAD (grant number 611621). We also acknowledge CNPq-Brazil (grant 305071/2012-2).
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de Jesus Oliveira, V.A., Nedel, L., Maciel, A., Brayda, L. (2016). Localized Magnification in Vibrotactile HMDs for Accurate Spatial Awareness. In: Bello, F., Kajimoto, H., Visell, Y. (eds) Haptics: Perception, Devices, Control, and Applications. EuroHaptics 2016. Lecture Notes in Computer Science(), vol 9775. Springer, Cham. https://doi.org/10.1007/978-3-319-42324-1_6
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DOI: https://doi.org/10.1007/978-3-319-42324-1_6
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