Improvement of experimental system for tracking the threshold of perception currents

The possible health effects of exposure to electromagnetic fields have been worried. In our previous study about the health effects of contact current, the experimental system which measured the threshold of perception currents for Japanese was constructed. In this paper, we have improved the system by reconsidering the instruments and the measurement methods. As a result, the measurement is steady, measuring time is shortened, and then the load to the subjects has reduced.