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Chapter 15: Problem 1

Why do your ears "pop" when you drive up a mountain?

Short Answer

Expert verified
The 'pop' in your ears when driving up a mountain is the result of air being released from the Eustachian tubes to equalize the pressure between the middle ear and the decreasing atmospheric pressure at higher altitudes.

Step by step solution

01

Understanding the structure of the ear

Firstly, the human ear is made up of three parts: the outer ear, the middle ear, and the inner ear. Between the middle and inner ear, there is a small tube known as the Eustachian tube, which helps to equalize the pressure between the middle ear and the pressure in the atmosphere. It does this by releasing small amounts of air and thus, maintaining equal pressure on both sides of the eardrum.
02

Considering the change in altitude

When you drive up a mountain, the altitude increases. This means you are getting further from sea level. With increase in the altitude, the atmospheric pressure decreases.
03

Analyzing the effect of pressure change on the ear

Due to the decrease in the atmospheric pressure at high altitudes, the pressure within the middle ear (which is at a higher pressure because it was equalized to the sea-level atmospheric pressure) pushes the eardrum outwards. The Eustachian tube reacts by releasing some air from the middle ear to the back of the nose to equalize the pressure again, leading to a 'pop' sound. This is your body's way of adjusting to the change in pressure.

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