• Acoustic neurinoma
The neurinoma or more exactly the acoustic Scwannoma is a benign tumour which starts and develops at the expense of vestibular nerve at the level of the internal auditory canal. Its expansion, more or less rapid according to cases, begins in the internal auditory canal and then in the near areas ( cerebellopontine-angle tumour syndrome).
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• Provoked otoacoustic emissions
They correspond to sounds emitted by the internal ear in response to a sound stimulation and recordable in the external auditory canal.
It is the ideal test for the detection of neonatal hearing losses.

• Videonystamography
The videonystamographic and videonystamoscopic examinations must be performed in the dark due to the use of a mask. Complete darkness which removes the visual afferences allows us to perform a faithful study of the vestibules.
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• Auditory Brain Response
They give us information about the electrical activity of the internal ear, the auditory nerve and the cerebral trunk during a sound stimulation.
They must be performed in a soundproof room. A short anaesthesia is sometimes necessary for very young children.
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• The audiometric
The audiometric examinations allow us to define the type of deafness (see the classification of hearing losses) and to number the auditory losses.
They generally include 3 different tests which must be performed on each ear separatly: the tonal audiometry, vocal audiometry and the impedancemetry.
The 2 first must be performed in soundproof rooms because the influence of surrounding sounds can be important.
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