A vibration signaling system for support of the hearing-impaired

An alternative for speech information is highly desirable for the hearing-impaired. The presentation of speech information using tactile senses is proposed in this study. Initially, vibration perception thresholds were measured to determine the optimum position (fingertips, proximal phalanges, or wrist) and frequency for presenting vibration in the proposed system. It was established that all three places could be candidates for vibration presentation positions. In addition, we showed that the frequency band of 125 Hz was suitable for vibration stimuli.