Fig. 2.

Estimated cross-frequency coupling under different settings of PAC and AAC. Sampling rate was fixed at 600 Hz, epoch length at 2 s and number of epochs at 15. Different lines represent different quantities ρ of noise added, hence different signal-to-noise ratios. In the left column the amount of AAC was set at 0, while the amount of PAC varied. Vice versa for the second column. The third column shows the estimates obtained for simulations where w₁ equalled w₂.