Atmospheric pressure? help quick?

Question

using P=hpg (p=density), explain why you can notice a change in atmospheric pressure when taking an elevator in a tall building.

Answer 1

Going non-stop to the top of a tall building in a lift, your ears will 'POP !' due to the internal pressure of the ears equalising with the slightly lower external pressure. (decrease in air density).

(A similar effect as when taking off and landing in a plane).

Answer 2

too small of a change to notice its all most likely psychosumatic

Answer 3

the density in the atmosphere changes with altitude, thus contributing to the change in pressure