Sensorineural hearing loss
Stirrup

Sensorineural hearing loss
This is the most common form of hearing loss. It happens when some of the delicate hair cells inside the cochlea are damaged and therefore unable to transform the sound vibrations into electrical signals for the brain. Sensorineural hearing loss is permanent and is usually best remediated with hearing aids.

Stirrup
The third of the three middle ear bones, also called the stapes. The stirrup transmits the sound vibrations via the oval window to the inner ear fluids.