Delta, Theta, Alpha...etc.?

Question

Delta, Theta, Alpha, Mu Rhythm, Beta & Gamma waves. (Brainwaves)

In which electromagnetic spectrum category are they under?

Thanks!

Answer 1

Most of the brainwaves are ELF (extremely low frequency) waves, the lowest categorized frequency, which are waves with frequencies between 3 and 30 Hz. However, gamma waves can be ELF or SLF (super low frequency); SLF waves have frequencies between 30 and 300 Hz. The brain waves have frequencies as follows:

Alpha: 8-12 Hz
Beta: >12 Hz
Gamma: 26-70 Hz
Delta: <2 Hz
Theta: 4-8 Hz
Mu: 8-13 Hz

Note that gamma waves can exceed the 30 Hz cutoff for ELF waves.