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. 2019 Apr 19;19(8):1867. doi: 10.3390/s19081867

Figure 5.

Figure 5

The framework of the BCI application. (a) The subjects wear the smart helmet containing the sponge electrodes for EEG signal acquisition and sit in front of a high-frequency monitor to perform the SSVEP-based BCI application; (b) The paradigm of the application. The application consists of 30 trials, which in total takes approximately 6.5 min.