HaptiRead : Reading Braille as Mid-Air Haptic Information

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Paneva, Viktorija ; Seinfeld, Sofia ; Kraiczi, Michael ; Müller, Jörg:
HaptiRead : Reading Braille as Mid-Air Haptic Information.
In: DIS '20: Proceedings of the 2020 ACM Designing Interactive Systems Conference. - New York, NY : Association for Computing Machinery , 2020 . - S. 13-20
ISBN 978-1-4503-6974-9
DOI: https://doi.org/10.15495/EPub_UBT_00004967

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Abstract

Mid-air haptic interfaces have several advantages - the haptic information is delivered directly to the user, in a manner that is unobtrusive to the immediate environment. They operate at a distance, thus easier to discover; they are more hygienic and allow interaction in 3D. We validate, for the first time, in a preliminary study with sighted and a user study with blind participants, the use of mid-air haptics for conveying Braille. We tested three haptic stimulation methods, where the haptic feedback was either: a) aligned temporally, with haptic stimulation points presented simultaneously (Constant); b) not aligned temporally, presenting each point independently (Point-By-Point); or c) a combination of the previous methodologies, where feedback was presented Row-by-Row. The results show that mid-air haptics is a viable technology for presenting Braille characters, and the highest average accuracy (94% in the preliminary and 88% in the user study) was achieved with the Point-by-Point method.