Impedance Spectroscopy of Textile Electrodes
topic
Electrochemical impedance spectroscopy applies a small AC voltage perturbation across a frequency range from millihertz to megahertz to textile electrode-skin or electrode-electrolyte interfaces, fitting the resulting impedance spectrum to equivalent circuit models that quantify double layer capacitance, charge transfer resistance, and mass transport characteristics.
Role
Characterises the biopotential signal quality of textile ECG, EMG, and EEG electrodes by quantifying the electrode-skin contact impedance that determines signal-to-noise ratio, motion artefact susceptibility, and measurement bandwidth of garment-integrated physiological monitoring systems.