Scanning goods at the supermarket checkout: Listen & Download Scanning goods at the supermarket checkout .mp3 Error! Change your browser, please! ⇓ Download Knocking, The noise of the elevator ⚠ Warning system, numerical, male voice ⚠ Wooden whistle ⚠ Breaking a wood-glass product ⚠ Police whistle ⚠ Laboratory experiment ⚠ Noise ⚠ Scratch ⚠ Removing the napkins from the box ⚠ Trash falling, rack destruction ⚠ Ice crack ⚠ Rope fall ⚠ ★★★★★