Research Article

Some Computational Aspects of the Brain Computer Interfaces Based on Inner Music

Figure 5

Top: Recording of Inner tone—a tuning fork at 440 Hz, 8 EEG channels, spectral parts from 207 to 2078 Hz, marked 440–443 Hz feature in the dot product of best responding 6 channel spectra with overall well extracted 440–443 Hz line. Lower: (accumulated) time composite spectra—the dot product from the top part of the figure; time horizontal, frequency vertical, intensity coded by brightness.
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