③ In-Flight Atmospheric Pressure
The in-flight atmospheric pressure is maintained at about that at the altitude of 5,000~8,000 feet (1,524~2,438 meters) above sea level (a level that has little effect on the average healthy person).
→ If your ears should become deafened or affected by the pressure change upon aircraft take-off or landing, either work your jaw up and down lightly or drink some water. Another useful practice is to close your mouth and hold your nose while blowing out lightly.
→ For small children, giving them something to eat or feeding them milk is recommended.