noun
tinnitus
TIN-ih-tus/ˈtɪnɪtəs/
Ringing, buzzing, or other sound heard without an external source.
Her tinnitus sounds like a steady ringing in a quiet room.

Etymology
Latin tinnitus named ringing or jingling generally. In medical use, that sound-name became a term for ringing perceived in the ears, encompassing buzzing as well.
In context
tinnitus or ringing in your ears some people may even lose their ability to see or hear normally
More examples
- His tinnitus makes it hard to fall asleep.
- She describes her tinnitus as buzzing rather than ringing.
- The doctor asks when the tinnitus began.