Binaural Beats for Delta Rhythm (300Hz and 303Hz) to have a Good Sleep. 2016/8/12 2016/8/13 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: 300Hz Right: 303Hz Brain Wave: 3Hz (Delta rhythm) Effects To have a good sleep.