Figure 2
Electrode placement and electrophysiological recording using Earable. (a) Name of biopotential electrodes located on the headband. (b) Micrograph of fabric and conductive silicone electrodes. The scale bar is 500\(\upmu\)m. (c) Frequency-dependent impedance of FH, BE, and OTE electrodes. (d) (i) Experimental setup for biopotential correlation tests for fabric FH (top) and conductive silicone OTE (bottom) electrodes. (ii) Exemplary electrophysiological signals during several bio-calibration events collected from the FH location. Data is shifted vertically for clarity. (iii) Correlation coefficients between electrophysiological signals collected using our dry electrodes and the clinical standard wet Ag/AgCl electrodes at the FH and OTE locations. Note that the eye blinking is not observable at the OTE location.
