A New Recognition Method for the Auditory Evoked Magnetic Fields

Figure 4

Single trial AEFs enhancement. (a) Three detected original single trial AEFs. The first column displays time domain diagrams of the three AEFs. The x-coordinate represents time, and the y-coordinate represents the normalized amplitude. The red lines in the time domain diagram represent the signals detected by the auditory channels and the black lines are the signals detected by other channels. The occurrence times of the three peaks P50, N100, and P200 are marked by blue lines. The second column shows the corresponding distribution of the normalized energy across the scalp. The 2D image has a resolution of 224 × 224 pixels so that it can be taken as input by GoogLeNet. (b) Three corresponding enhanced single trial AEFs. The area in the red circle represents the auditory area of the temporal lobe, where the normalized energy is basically concentrated in, which makes GoogLeNet able to easily identify it.

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