Brainstem Evoked Response Audiometry (BERA)
With brainstem evoked respons audiometry, the hearing is objectively measured down to the level of the brainstem. An audible signal (clicks) is picked up by the ear via headphones. This sound is converted to an electrical stimulus that is guided to the brain via the auditory nerve. A BERA result consists of waves. Each peak corresponds to a specific location on the path from the cochlea to the brainstem.
The BERA trajectory is compared with normative values. Deviations may indicate retrocochlary disorders. The test does not last longer than 30 minutes and is not painful. Four electrodes are glued to the skin to measure the route.