Most people will experience tinnitus symptoms at some time in their life.

大多数人都将经历耳鸣症状，在某些时候，在他们的生活。

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Such "hidden" hearing loss, not evident in the audiogram (a test that measures hearing sensitivity), is also apparent in human listeners who experience persistent tinnitus, but otherwise normal sensitivity.

BBC: Viewpoint: Does deafness contribute to dementia?