Figure 11. Two-hand tapping at 2 Hz with the B319 sensor 63 cm away; sensors Bx, By, and Bz remained 4.5 cm away from the subject.

Fourier transformed data evaluating effects of sensor distance on measured electromagnetic field during two-hand tapping exercises. Sensor differences varied in this test, with sensors Bx, By, and Bz remaining 4.5 cm away from the subject while sensor B319 (in black) 63 cm away from the subject.

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