Review on EEG-Based Authentication Technology

Table 1

Different frequency band characteristics of EEG signals [17].

Frequency band	Frequency range	Amplitude	Status	Main region
Delta	1–4 Hz	20–200 uV	Infant, adult deep sleep, deep anesthesia, physiological coma	Occipital and frontal lobes
Theta	4–8 Hz	100–150 uV	Adolescents, adults in fatigue, depression, or old age	Parietal and frontal lobes
Alpha	8–13 Hz	20–l00 uV	Adults are sober and quiet	Posterior occipital lobe and parietal lobe
Beta	13–30 Hz	5–20 uV	Fully awake, irritated, and excited	Frontal and temporal lobes, and central areas
Gamma	>30 Hz	<2 uV	Cognitive learning and information processing	Somatosensory centre