Spectrograph: Listen & Download Spectrograph .mp3 Error! Change your browser, please! ⇓ Download Crusher ⚠ Small centrifuge ⚠ Notches, print imprinted in cardboard ⚠ Steam pump ⚠ Industrial exhaust fan ⚠ Oil pump ⚠ Factory atmosphere, drone in a mine tunnel ⚠ Hydraulic activator ⚠ Laser welding ⚠ Electric generator (hum) ⚠ Breakdown press ⚠ Fluid drilling, Brewing unit ⚠ ★★★★★