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Table 1 Electrical characteristics of significant brainwaves

From: Mental state and emotion detection from musically stimulated EEG

Brainwave

Frequency range (Hz)

Amplitude (μV)

Mental function

\(\delta\)

0–4

10–100

Unconsciousness during a deep dreamless sleep

During a deep dreamless sleep

\(\theta\)

4–8

10–50

Subconscious mind

Focused attention

Emotion responses

\(\alpha\)

8–12

5–25

Relaxed mental state

\(\beta 1\)

12–16

0.1–1

Intense focused mental activity

\(\beta 2\)

16–30

< 0.1

Anxious alert

\(\gamma\)

30–99

≪ 0.1

Hyper brain activity

  1. Amplitude values measured during data collections