“…feature extraction, feature selection, classification) have been listed and compared amongst each other. There are two types of approaches found in the literature; one is time-domain based techniques like sliding window, dV/dt, root mean square value (Axelberg et al, 2007; Styvaktakis et al, 2002), higher order statistics (Perez et al, 2011), envelope analysis, Kalman filter (Khoa and Tung, 2018; Xi et al, 2018) and so forth; another type is frequency domain based techniques like fast Fourier transform, wavelet transform (WT) (Jeevitha et al, 2018), Hilbert transform (Biswal et al, 2018; Sahani and Dash, 2018), Goertzel algorithm (Najafi et al, 2018) and so forth.…”