Fig. 8.

Group average cortical waveforms obtained using the denoising source separation algorithm for unprocessed and vocoded DISH and DITCH stimuli in young normal-hearing (YNH), older normal-hearing (ONH), and older hearing-impaired (OHI) listeners. Expected aging effects are observed for more prominent N1 and P2 components in the older listeners compared to the younger listeners. Note that the denoising source separation algorithm rectified the peaks, so the typically negative N1 component is a positive peak. YNH: unprocessed = blue, vocoded = cyan; ONH: unprocessed = red, vocoded = pink; OHI: unprocessed = black; vocoded = gray