While travelling to higher altitudes, people can feel pain in the ear and dizziness. Which part, among the following is involved ?

Eustachian tube is to equalise the pressure on either sides of the ear drum; sudden elevation in height causes disturbance in maintaining pressure by this area of ear. The semicircular ducts, the anterior, posterior and lateral semicircular ducts, are enlarged at one end to give rise to ampulla. Each ampulla contains sensory path of hairs, the cristae, which is concerned with the balancing of the body, Change in altitude brings changes in the reorientation and adjustments in these structures of internal ear causing of dizziness and vomiting, faced by a person travelling at higher altitude.