“…Combining previously mentioned frequency and time-frequency methods with fields such as chaos theory, some authors based their work on fractal dimension [14], [18], [19] or ergodic quantities such as Largest Lyapunov exponent [20] or information entropy [21], [22]. Also, there is a large portion of available literature that utilizes variations of a well-known algorithm derived from the speech recognition niche, the Dynamic Time Warp (DTW) [23], [24], [25], [26], [27].…”