Alternative vibration presentation methods for the two-point Body-Braille system

We developed Body-Braille as an information transmission support tool for the deaf-blind using vibrations. In our previous system, a motor was used to generate vibrations. In this study, a vibration speaker was used in an attempt to improve readability. We investigated improvements in the rate of correct answers recorded by participants when using different frequencies, amplitudes, and presentation methods. The chosen parameters were appropriate for the three-sequence vibrations used in the two-point Body-Braille system. Our goal was to identify the parameters which the participants found most natural. A correct answer rate of 85% was achieved even with participants who had never experienced the two-point Body-Braille system.