Delta: 1-4 Hz. Delta is the lowest frequency state, and it’s linked to:
Theta: 4-8 Hz. Theta binaural beats benefits include:
Alpha: 8-14 Hz. When you are in an alpha state of mind, your brain is focused and productive. Alpha brain waves help you to:
Beta: 14-30 Hz. Beta is a higher frequency brainwave and helps in:
Gamma: 30-100 Hz. With a higher frequency than beta, these brain waves help in:
source: https://www.webmd.com/balance/what-are-binaural-beats