Synthetic spectra were generated using the analytical DRTs and impedances reported in Table . We used 𝑀 = 81 log-spaced frequencies between 10 -2 and 10 6 Hz with ten points per decade (ppd). Unless otherwise specified, the random errors, 𝛆 , were computed according to Section 2.2 with 𝜎 = 0.5 Ω.