Digital filtering of EMG-signals.
Even under field conditions the registration of EMG-signals is often interfered with artifacts. For quantitative signal processing it is necessary to eliminate artifacts and noise from the EMG raw data. We show a simple and efficient way with the help of a recursive digital first order Butterworth filter. This filter-type has a great slope steepness and requires minimal calculations. The algorithm is derived and easily programmable.
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D000465:Algorithms; D004576:Electromyography / Q000379:methods*; D012815:Signal Processing, Computer-Assisted