Your brain’s active state during REM sleep also explains ... your brain is home to theta waves, which typically have a frequency in the range of 4-7.99hz. “Theta waves are slower than alpha ...

Theta waves (4-7 Hz) are common in the lighter stages of sleep or the transition from waking to sleeping. Delta waves (0.5-4 Hz) signify a state of deep sleep. A binaural beat with a frequency ...