I. Introduction
Wearable computing is the study or practice of inventing, designing, building, or using miniature body-borne computational and sensory devices [1]. Applications of wearable computing devices nowadays include a wide range of usages in various industries and environments, which include applications for smart bio-monitoring in health care system, sports training and military operation, and also applications for entertainment, performance art, and improved safety and work efficiency [2]. Among the most interesting wearable computing devices, one can certainty count Electroencephalography (EEG) headsets, namely monitoring devices used to record the electrical activity of the brain.