Binaural Beats for Delta Rhythm (200Hz and 203Hz) to have a Good Sleep. 2016/7/12 2016/8/12 Binaural Beats, Demo, Youtube Share the brain’s level upper !! LINE! CLIP! Please listen with headphones or earphones. Sponsored Links Beat Type Binaural Beats Frequencies Left: 200Hz Right: 203Hz Brain Wave: 3Hz (Delta rhythm) Effects To have a good sleep.