Small crank rotation: Listen & Download Small crank rotation .mp3 Error! Change your browser, please! ⇓ Download In the school corridor, sounds of, voices ⚠ Cereal packaging open ⚠ Open, briefcase, Diplomat, close the castle ⚠ Umbrella opening ⚠ Lightsaber battle ⚠ Throw nutshells on the floor ⚠ Tablecloth ⚠ Old bike ⚠ Sine wave (975Hz) ⚠ Close, The metal gates of the grill open ⚠ Sand bag ⚠ Crowd noise, Church ⚠ ★★★★★