Theory behind BrainWave Generator
EEG and the brain's state
EEG (Electroencephalography) technology is used to measure brain's electrical vibrations from the surface of the scalp. The resulting EEG pattern will contain frequency elements mainly below 30Hz. The frequencies are categorized into four states as follows: State Frequency range Amplitude State of mind
Delta 0.5Hz - 4Hz high (up to 200uV) Deep sleep
Theta 4Hz - 8Hz low (5uV - 20uV) Drowsiness (also first stage of sleep)
Alpha 8Hz - 14Hz high (up to 200uV) Relaxed but alert
Beta 14Hz - 30Hz low (less than 10uV) Highly alert and focused
The dominant frequency in the EEG pattern determines what shall be called the current state of the brain. If the amplitude of the alpha range frequencies is highest, then the brain is said to be in the alpha stage. Note, that other frequencies still exist and it is impossible to give any "exact frequency your brain is operating on". However, later references to......

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Title: Brain Wave Genereation
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