Fig. 1
From: Spectral-temporal EEG dynamics of speech discrimination processing in infants during sleep
Time-amplitude waveforms (upper plots) and time–frequency spectrograms (lower plots) for each stimulus. Stimuli are grouped by contrast condition: a non-speech (noise-tone), b vowel (/i/–/a/), and c consonant (/da/–/ba/). The time–amplitude waveforms are plotted in blue for the standard stimuli (tone, /a/, and /ba/) and in red for the deviant stimuli (noise, /i/, and /da/)