Spectrograph: Listen & Download Spectrograph .mp3 Error! Change your browser, please! ⇓ Download Laser welding ⚠ Glass bottles on a conveyor line, room noise ⚠ Box making machine ⚠ Lithographic press ⚠ Stamping press ⚠ Forklift in motion ⚠ Bottling plant ⚠ Air compressor turn on, turn off ⚠ Circular knitting machine ⚠ Canning machine ⚠ Work in a warehouse, general noise, loaders ⚠ Vibrosieve at the factory ⚠ ★★★★★