There are many devices which provide vibratory sensation to the skin but only a few use vibratory sensation for practical applications. In this study, the vibration pattern is produced by a 1010 array of small vibrator (PZT) reeds (50 Hz) and the entire array fits on finger tips. This apparatus can be used by the blind who can recognize the correct order of the characters from the motion of the vibrator points. Color character recognition is achieved by using both electrical and mechanical stimuli.

This study describes the relationship between the recognition of shape and the electromyogram(EMG)generated on the surface of the human hand. Three spectral peaks(100, 160, and 250 Hz)were obtained after grasping each shape(sphere, tetrahedron, and cube). Peaks in the EMG spectra were identical in frequency for each shape. Feature extraction of different forms could not therefore be quantified as spectral variation in the EMG.