Estimates whether dominant powerline interference is at 50 Hz (Europe/UK)
or 60 Hz (North America) by comparing PSD power at both frequencies using
Welch's method on the first 10 seconds of the signal.
Usage
detect_powerline(signal, sr)
Arguments
- signal
Numeric vector. Should be an EEG or broadband channel with
sufficient bandwidth.
- sr
Numeric. Sampling rate in Hz. Must be > 100.
Value
Integer. 50L or 60L.
Details
If the signal's Nyquist limit is below 60 Hz, returns 50L immediately.
Examples
if (FALSE) { # \dontrun{
detect_powerline(eeg_signal, sr = 256)
} # }
