Fig. 4
From: An open dataset for human SSVEPs in the frequency range of 1-60 Hz
Stimulus signals recorded with a photodiode at a stimulus frequency of 60 Hz. (a) Superimposed waveforms of 30 trials with data segments ranging from 2.2 to 2.6 s, including enlarged data segments. (b) Amplitude spectrum of stimulus waveforms recorded by the photodiode.
