Calculating power for the FOOOF peaks of the periodic components

[Raymundo.Cassani]

FOOOF parameters are for the parametrization of the PSD, in this sense Amplitude refers to amplitude in the PSD so, it's really power, and it is given in Bells [B]. See this link for a description of FOOOF parameters:

https://neuroimage.usc.edu/brainstorm/Tutorials/Fooof#Accessing_FOOOF_model_parameters

Moreover, this other thread is relevant for your question:

FOOOF model, and PSD units

However, I have another related question and hope you could guide me. What is the formula for FOOOF? I have , for example, these parameters: aperiodic_params: [-9.18, 1.02] peak_params:[8.91, 1.69, 1.14; 18.35, 0.80, 1.40] Is the fitted function like this: 10^(-9.18) * f^(1.02) + 1.69exp(-1/2((f-8.91)/1.14)^2 ) + 0.80exp(-1/2((f-18.35)/1.40)^2 ) or something else? In addition, I have particularly problem with the units of PSD. Please look at these three plots of the same PSDs: The FOOOF p…