Spectrograph: Listen & Download Spectrograph .mp3 Error! Change your browser, please! ⇓ Download Newspaper press ⚠ Glass bottles on a conveyor line, room noise ⚠ Working machine engine ⚠ General noise, Factory work ⚠ Lithographic press ⚠ Hydraulic activator ⚠ Mill for grinding grain, Brewing unit ⚠ Canning machine ⚠ Hydraulic down machine ⚠ Book press ⚠ Power Plant Water Pumps ⚠ Air blow, Air compressor ⚠ ★★★★★