Neural Entrainment

https://www.sciencedirect.com/science/article/pii/S0378595510000262

EEG processing began with segmentation of the continuous EEG to epochs beginning 100 ms before until 2300 ms after each tone burst onset. Eye movement correction (Attias et al., 1993) and artifact rejection (±150 μV) followed segmentation. Average waveforms were then computed for the 3 and 6 Hz beats in the 250 and 1000 Hz base frequencies of each beat type (binaural and acoustic beats). Consequently, between 300 and 350 repetitions were averaged to obtain the potentials evoked by each stimulus condition. These 8 separate averages (2 Beat Frequencies × 2 Base Frequencies × 2 Beat Types) were computed for each subject, as well as across subjects to obtain grand mean waveforms. After averaging, the data were band-pass filtered (FIR rectangular filter with a cutoff at 2–10 Hz) and baseline (average amplitude across the 100 ms before stimulus onset) corrected. This filter was chosen to enhance the detection of the beats-evoked oscillations and was found to have only a minor effect on the amplitudes of the onset-evoked potentials. This minor effect was common to all onset responses and hence did not affect the comparisons across conditions that were conducted in the waveform analyses.

P50 and P200 are the first two positive ERP waves, and other papers have shown that response onset is about 200 ms.

https://journals.physiology.org/doi/full/10.1152/jn.00224.2014

Response latency for maximum value of cross-correlation (figure 7) was ~75 ms for 10 Hz.