“…Sensory data are first collected, analyzed, and then fed back to the human sensor nervous system in a simple, direct and immediate way.Modern biofeedback experiments began in the early 70's of the last century [1-3], with a promising evidence observed on the efficacy of clinical biofeedback applications [4][5][6][7]. For past five decades, uses of biofeedback techniques have been widely seen in health, wellness, awareness, and computer interactive entertainment, including therapies of self regulation of psychiatric and physiologic disorders [8][9][10][11][12][13][14][15][16][17][18][19][20][21], rehabilitation [22][23][24][25][26][27][28], healthcare [29][30][31], training activities such as balancing [32,33], postural [34,35], relaxation [36] and sports [37,38], development of socio-emotional interactions [39,40], assessment of psychophysiological stress [41][42][43][44], falling prevention and detection [45], computer game design [46], and more.Smart biofeedback [47][48][49][50][51]…”