#total deafness
- Anacusis — Total, complete, and permanent loss of hearing in one or both ears, structurally caused by profound damage to the cochlea, the auditory nerve, or the cortical nerve centers in the temporal lobe. This clinical phenomenon differs from hypoacusis by the absolute absence of any functional residual hearing, depriving the patient of sound wave perception and requiring complex neuro-sensory rehabilitation strategies or cochlear implantation.