Brainwave States

Frequency rangeBrainstate NameAssociate With:
13-40 HzBeta wavesAlertness
7-13 HzAlpha wavesRelaxed but awake
4-7 HzTheta wavesdeep meditation
<4 HzDelta wavesDeep dreamless sleep

The exact boundaries between ranges vary among definitions,
and there is no universally accepted standard

Sinusoidal waves of various frequencies; the b...

Sinusoidal waves of various frequencies; the bottom waves have higher frequencies than those above. The horizontal axis represents time. Higher frequencies produce higher energy, more focused and alert response; lower frequencies produce lower a energy relaxation to meditation to sleep response.

The dominant frequency determines your current state. For example, if your alpha waves dominate, you are in the alpha state (this happens when you are relaxed but awake). However, also other frequencies will be present, albeit with smaller amplitudes. Gamma waves aren’t usually your dominant frequencies.

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