Air is let through the regulator: Listen & Download Air is let through the regulator .mp3 Error! Change your browser, please! ⇓ Download Soccer ball ⚠ Air is blown through a glass tube ⚠ Blower, air broom ⚠ Helium balloon ⚠ Truck Air Brakes ⚠ Air flow ⚠ Air release with a loud whistling creak, ⚠ Rope torsion ⚠ Balloon inflating ⚠ Balloon descent ⚠ Mask breathing ⚠ Cut through the air with a gas burner ⚠ ★★★★★