But when I try plotting the PSD of the continuous EEG signals. The power levels are very high and have a weird peak around 25 Hz, as you can see from the picture attached below. Is it recommended to have PSDs around 0 dB? Thanks for the clarification again! [PSD_raw]

Since power line frequency in your recording seems to be 50 Hz, the peak at 25 Hz is likely a sub-harmonic of the power line noise. Power is usually higher for lower frequencies, so the PSD traces going up as we move from larger to smaller frequencies is to be expected. Regarding the absolute valu…

PSD: Power peaks at 25 and 0 Hz?

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Mukil January 4, 2023, 7:51am 3

Thank you for the clarification @richard

How to remove DC bias from continous raw eeg signal?

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PSD: Power peaks at 25 and 0 Hz?

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