Consider the following process which the Muse device uses to calculate the absolute band power:
S1: Capture raw EEG values
S2: Carry out FFT
S3: Use the FFT values to consolidate the absolute values for various waves (alpha, beta etc.)
I just wanted to understand the following:
- What are the smoothing and de-noising techniques (if any) that are carried out in the above process flow?
- At which step is the de-noising applied?
- Are techniques like ICA, PCA, Wavelet de-noising used?