In this study, two techniques have been proposed for presenting high-resolution directional information using vibrotactile stimulation to the head by plural vibrating motors.
One is two-motor technique that presents directional information by vibrating two motors simultaneously and the other is single motor technique that presents directional information by vibrating only one motor depending on the presented direction.
In order to evaluate and compare these techniques, a prototype navigation system which employs 8 small vibration motors has been developed and some laboratory experiments with subjects have been conducted.
As the results, it was found that the presented direction can be recognized by the single motor technique more quickly and accurately than that by the two-motor technique independent of the number of the directional division.