Abstract
Vibration feedback is widely used in mobile information devices and video games. Improving reaction time to vibration is important for enhancing operability and usability. An eccentric rotating mass (ERM) and a linear resonance actuator (LRA) are typical vibrators in practical use and these are advantages and disadvantages in terms of stimulus magnitude and response speed. In this paper, we proposes a stimulation method to improve human reaction time using ERM and LRA to overcome the weakness of each actuator, which is especially the slowness at the starting point of ERM. The stimuli proposed realize vibration feedback that has enough magnitude and response speed at the same time. In the experiments, several types of combined vibrations were investigated for improving human reaction time and keeping naturalness of the perceived sensation. The results showed that the proposed method could improve the reaction time with 24 ms in average for a button-press task.
