Figure 4
The waveforms of electric field sensing including the input voltages of transformer (black), electric field intensities around the sensor (red) and light signals (blue).
(a) 50 Hz. (b) 500 Hz. (c) 2 KHz. (d) 10 KHz. (e) 19 KHz. (f) 25 KHz.
Figure 4 | Scientific Reports
