Spectrograph: Listen & Download Spectrograph .mp3 Error! Change your browser, please! ⇓ Download Notches, print imprinted in cardboard ⚠ Stop, Lathe turning on, work ⚠ Loaders, Work in a warehouse, general noise ⚠ Letter press ⚠ Canning machine ⚠ Forklift in motion ⚠ Compressor, run, start, shutdown ⚠ Printing press ⚠ Electric generator (hum) ⚠ Air blow, Air compressor ⚠ Spectrograph ⚠ Vibrosieve at the factory ⚠ ★★★★★