Mask breathing: Listen & Download Mask breathing .mp3 Error! Change your browser, please! ⇓ Download Inflating a mattress ⚠ Small compressor blowing air ⚠ Air flow ⚠ Steam ⚠ Helium balloon ⚠ Suction action of air ⚠ Balloon descent ⚠ The release of, The work of oxygen equipment ⚠ Air compressor operation ⚠ Air release with a loud whistling creak, ⚠ Oxygen balloon ⚠ Wind tunnel ventilation ⚠ ★★★★★