A frequency peak at 3.1 kHz obtained from the spectral analysis of the cochlear implant electrocochleography noise
Fig 4
Spectrograms obtained with evoked (red trace) and induced (purple trace) analysis methods in spontaneous conditions (no auditory stimulation) for the same electrocochleography cochlear implant data.
Notice the presence of a 3.1 kHz peak in the power spectrum of the induced, but not in the evoked analysis method. Box-plots (n = 20) show that the broadband noise (total power under the curve) is larger in the induced condition as compared to the evoked method (****t-test paired samples p = 2.34e-07) (AU: arbitrary units).