A key strength of our FFT-based DRT model lies in its ability to process arbitrary input signals, including chirp signals (as shown in Figures ) and (d) for the logarithmic case) and sawtooth functions. This capability significantly extends the limitations of the time-domain method. For illustrative purposes, panels (e)-(j) of Figure show the DRTs and impedances of the 2×ZARC and PWC models recovered using the logarithmic chirp. Using 100 synthetic voltages, we found that the logarithmic chirp led to the most accurate DRT and impedance recoveries, see Table and Figure , for both continuous (1×ZARC, 2×ZARC) and discontinuous (PWC) models.