Fig. 6From: Head phantoms for bioelectromagnetic applications: a material studyThe average conductivity of gypsum with NaCl in the casting compound in 0.17% NaCl solution at 25 °C for the (top) extended frequency range of 0.01 Hz to 100 kHz and (bottom) extended duration of 60 min at 10 Hz. The dashed line shows the data for each sample as color-coded. The shaded regions show µ ± σ (purple) and µ ± 0.05µ (blue) for comparisonBack to article page