A recording of a patient using a respirator or breathing from an oxygen mask.
Slow laboured breaths through oxygen mask, MP, reveberant room
Respirator pump clicks up and down with hiss of oxygen through mask as patient breathes.
Ambulance interior, an oxygen pump being squeezed
Oxygen hiss from ventilator or mask regulator at a medium perspective.
Respirator pump clicks up and down with hiss of oxygen through mask.
Ambience inside hyperbaric/recompression chamber. Surging whining hum.