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biological

Judged: two independent readers; copy check clear.

tinnitus

tinnitus Tinnitus is a symptom in which a person hears sounds such as ringing, buzzing, clicking, or pulsating noise in the ear without an external source.

Tinnitus is a symptom in which a person hears sounds such as ringing, buzzing, clicking, or pulsating noise in the ear without an external source. It may be heard only by the affected person or, in some cases, come from within the ear or nearby structures and also be audible to others, and it can occur with a range of hearing and neurological conditions.