Abstract
It is well known that a particular brain signal (induced voltage) appear in time interval with 0.3-0.6 [sec] after our sense organ catches signal coming from external environment. However, it is not easy to detect it from raw data due to multiple background EEG signals as well as random noise. This paper proposes a new approach where this signal can be enhanced by suppressing α-wave, especially when an event happens under eye close. We first confirm that the phase of EEG signal much depends upon the position of electrode, and eventually found that there is an appropriate electrode arrangement making the induced voltage enhance by suppressing α-wave. We apply this idea to an experiment where stepwise pressure is given to finger tip under eye close, and confirmed the effectiveness of the proposed idea.
