PADI Divemaster Certification Practice Exam

What can happen if a diver experiences middle ear squeeze?

1. The eardrum ruptures outward

2. Hearing improves significantly

3. The ear feels "full" with reduced hearing

4. There is no physical sensation in the ear

The correct answer is: The ear feels "full" with reduced hearing

When a diver experiences middle ear squeeze, the pressure in the middle ear becomes lower than the pressure in the water surrounding the diver. This condition leads to a sensation of fullness in the ear, as the external pressure forces the eardrum inward. As a result of this pressure imbalance, the diver may also notice reduced hearing capabilities because the eardrum's ability to vibrate is compromised. The sensation of fullness and reduced hearing are key indicators that the diver is experiencing this issue, emphasizing the importance of equalizing pressure during descent. The other options describe scenarios that do not accurately reflect what occurs during middle ear squeeze. For instance, the notion of the eardrum rupturing outward contradicts the mechanics of pressure imbalance, which would instead potentially lead to an inward rupture if the condition progresses without proper equalization. Improved hearing is also inconsistent with the symptoms of middle ear squeeze; rather, the sensation is characterized by discomfort and diminished auditory perception. Lastly, the absence of any physical sensation in the ear fails to acknowledge the significant discomfort and fullness typically experienced in such situations.