How does it feel to be in a hyperbaric oxygen chamber?

How does it feel to be in a hyperbaric oxygen chamber?

When the cabin is pressurized, in order to balance the pressure, the ears will feel full, similar to the feeling when landing on an airplane. When the pressure is constant, the discomfort will disappear. During the process of oxygen inhalation, the cabin is very quiet, and the eardrums of both ears have adapted to the pressure in the cabin, and only the sound of breathing can be heard. Reading a book during oxygen therapy is a good choice.