Which statement best defines sensorineural hearing loss?

• A. It occurs when sound waves cannot pass through the outer ear.
• B. It is diagnosed with the Rinne test.
• C. It is corrected by wearing a hearing aid.
• D. It is caused by damage to the cochlea or auditory nerve.

Answer: (D)

Sensorineural hearing loss occurs when the inner ear (the cochlea) or the auditory nerve is damaged, so sound is not properly converted into neural signals or transmitted to the brain. This explains why people may hear sounds dimly or hear them distorted, even though sound can still reach the inner ear. It differs from conductive loss, which results from a blockage or problem in the outer or middle ear that prevents sound from reaching the inner ear in the first place. The Rinne test is a quick bedside tool to help distinguish conduction problems from sensorineural ones, but it does not by itself diagnose sensorineural loss; audiometric testing is used for a full assessment. Wearing a hearing aid can help many with sensorineural loss, but it is not the defining feature of the condition, and some cases may require different interventions such as cochlear implants. The essential point is damage to the cochlea or auditory nerve.