Concept guide

Brainwave Frequencies Explained

EEG recordings are often discussed in broad frequency bands such as delta, theta, alpha, beta and gamma. These labels describe patterns in measured electrical activity; they are not buttons that guarantee a particular mental outcome.

Delta

Low-frequency activity often discussed in relation to sleep.

Theta

A band discussed across sleep, memory and cognitive research contexts.

Alpha

Often observed prominently during relaxed wakefulness, especially with eyes closed.

Beta & Gamma

Higher-frequency activity studied across many cognitive and sensory processes.

Why marketing gets tricky

Associations between a frequency band and a state do not mean playing audio with the same numerical label will reliably create that state. That inference requires evidence.

Go deeper: gamma brain waves · brainwave entrainment