The cabin is pressured to a lower equivalent altitude
, which, according to Qatar Airways, means you can breathe in more oxygen than in any other aircraft, resulting in less travel fatigue and dizziness and fewer headaches.
Expressing the effects of reduced air density as an equivalent altitude
is just an arcane aviation-centric way of discussing the physics so pilots can relate to it better.
I have climbed the equivalent altitude
of Mount Everest five times without much rest.
Summarized the knowledge about the influence of intermittent hypoxia and here especially the optimal "profile" of equivalent altitude
, duration of exposure, the number of exposures and the pause between them on acclimatization AMS, and other factors is not yet clear.
These enclosures create a normobaric environment with an equivalent altitude
up to 30,000 feet, while completely removing the risks associated with a hypobaric environment such as sinus injuries and decompression sickness.
New aircraft utilize high-tech, carbon-fiber composite material in place of metals that allow cabin pressure to be set at an equivalent altitude
as low as 2000 feet versus 8000 feet today.
Most commercial airline antennas operate pressurized with cabin air at typically 5000 feet equivalent altitude