Glass bottles on a conveyor line, room noise: Listen & Download Glass bottles on a conveyor line, room noise .mp3 Error! Change your browser, please! ⇓ Download Electric generator (hum) ⚠ Circular knitting machine ⚠ Stamping press ⚠ Low frequency running engine ⚠ Forklift drives by ⚠ Hydraulic down machine ⚠ Spinning machine ⚠ Automatic telephone switch ⚠ Forklift approaching ⚠ Machine engine gaining momentum ⚠ Compressor industry ⚠ Turn off, Air compressor turn on ⚠ ★★★★★