Background perception and comprehension of symbols conveyed through vibrotactile wearable displays
summary
Study claims background vibrotactile symbols are readable without harming a concurrent visual search: an Arduino-driven seven-channel glove with 3.4 mm vibromotors uses overlapping spatiotemporal stimulation (100 ms bursts, 10 ms offsets) to encode a 10-symbol subset of the English alphabet. Seven participants train ~5 days (or 3 hours with the authors' method) and decode letters with high accuracy (reported up to 95% accuracy in prior work); here dual-task performance and NASA-TLX show no significant interference.
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