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(a) The 10–20 international system of EEG electrode placement [42], under CC by 4.0; (b) synthetic scheme 2. The initial peak-to-peak voltage signal is the synthetic peak-to-peak voltage injected from the digital oscilloscope to the head phantom. Thus, the actual peak-to-peak voltage signals are the peak-to-peak voltage collected from the head phantom and the peak-to-peak voltage noise is the difference between the injected and collected back peak-to-peak voltage signal.
