- How do you extract frequency bands from EEG?
- How do you find the frequency of an EEG?
- How do you filter an EEG signal?
How do you extract frequency bands from EEG?
In general, the traditional method for extracting frequency bands from a broadband EEG signal is to use a Fourier transform. There are various scripts for this from different EEG analysis software. Most scripts will allow you to change the frequency bins based on your definition (ie delta 1-4Hz, theta 4-7Hz, etc ...)
How do you find the frequency of an EEG?
To then calculate the frequency, you take I and divide it by the duration giving you, in this example, a 5Hz wave. The number of millimeters in one second in analog EEG was a straightforward piece of the equation; it corresponded to the paper speed.
How do you filter an EEG signal?
Digital filtering is a common preprocessing step when analyzing EEG data. The typical practice in EEG signal processing is to apply a high-pass filter to filter out slow frequencies less than 0.1 Hz or often even 1 Hz and a low-pass filter to filter out frequencies above 40 or 50 Hz Hz.