Howtosignalprocessing
What is linear envelope EMG?
The combination of rectification and low pass filtering is also called finding the “linear envelope” of the signal, since the filtering operation meets the mathematical definition of linearity (although the absolute value operation does not), and, because it is low pass, it captures the “envelope” of the signal.
How do you Analyse EMG data?
During the EMG signal processing, only positive values are analyzed. When half-wave rectification is performed, all negative data is discarded and positive data is kept. The absolute value of each data point is used during full-wave rectification. Usually for rectification, full-wave rectification is preferred.
