Definition
A gradual loss of hearing sensitivity that occurs naturally with aging, typically affecting the ability to hear higher frequencies first. It is a progressive, bilateral, sensorineural condition that develops over many years and is not caused by exposure to loud noise, though noise exposure can accelerate it.
Plain English
The slow loss of hearing that comes with getting older. It usually shows up first as trouble hearing higher-pitched sounds.
Context Anchor
Pilots may encounter this term in aviation medical discussions, hearing evaluations, or flight physicals.
Derivation
From Greek 'presbys' meaning 'old' and 'akousis' meaning 'hearing'. Literally 'old hearing' — which is exactly what it describes: the hearing changes that come with age.
Why Pilots Care
Age-related hearing loss can reduce a pilot's ability to understand ATC radio calls, especially in noisy cockpits.
Example Sentence 1
The pilot's flight surgeon noted early signs of presbycusis during his medical exam and recommended he start using noise-cancelling headsets to protect his remaining hearing.
Example Sentence 2
Presbycusis often makes it harder for senior pilots to pick out faint radio transmissions.