Predicted radio spectra for SN 2012au at 5, 7, 10, and 15 yr post-explosion using the model determined by nebular spectral and light curve modeling, as well as the observed data at seven years from Stroh et al. (2021). The free-free absorption was calculated by assuming a completely singly ionized ejecta and electron temperature of 10⁴, as was done in previous works, as well as using the output of our nebular spectral calculations.