eli5: Why do our ears pop when we change altitude? And if it’s pressure, why do they do it in pressurised plane cabins?

Question

eli5: Why do our ears pop when we change altitude? And if it’s pressure, why do they do it in pressurised plane cabins?

In: 14

Answer 1

I live on top a hill and without fail everytime I go down it on the way to work my ears pop lol, it was annoying for awhile but I’m now used to it.