Binaural Beats for Delta Rhythm (500Hz and 503Hz) to have a Good Sleep. 2016/8/27 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: 500Hz Right: 503Hz Brain Wave: 3Hz (Delta rhythm) Effects To have a good sleep.