Sine wave (975Hz): Listen & Download Sine wave (975Hz) .mp3 Error! Change your browser, please! ⇓ Download Open wooden box ⚠ Umbrella opening ⚠ Chemistry, stir the liquid in a beaker ⚠ Spray Shaving Foam ⚠ Items fall on the carpet. ⚠ Flag flapping in the wind ⚠ Supermarket Cart ⚠ Suction, blisters, Wet ⚠ The metal gates of the grill open, close ⚠ Tent Camping ⚠ Crashing in the fall ⚠ The robot moves, makes sounds ⚠ ★★★★★