Figure 12. Results of two-hand tapping at 2 Hz among three subjects with sensor B319 at a distance of 63 cm, and sensors Bx, By, and Bz remaining 4.5 cm away.

Fourier transformed data of effects of sensor distance away from the scalp during two-hand tapping on multiple subjects. Sensors Bx, By, and Bz were maintained at 4.5 cm away from the scalp within the electromagnetic field channel while sensor B319 ( in black) was placed 63 cm away.

Panel A: subject 1; Panel B: subject 2; Panel C: subject 3

Abbreviations: Hz, Hertz; V/rtHz, voltage divided by square root of Hertz; cm, centimeters