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An example of reducing WGN from surface EMG using different methods. From top to bottom: (a) the original highly clean surface EMG signal (denoted as EMG2); (b) the surface EMG signal contaminated by WGN; (c) the output of the IIR causal filter; (d) the output of the IIR noncausal filter; (e) the output signal after EMD filtering; and (f) the output signal after EEMD filtering.
