Note on hearing tests

I have had 6 types
1. Basic Auditory – i.e. headphones – test overall hearing.
2. Tympanogram – measures middle ear functionality.
3. Bone conduction – headphone style but the “sound” is conducted into the bonebehind the ear. Tests Cochlearfunctionality as by-passes middle ear
4. OAE. Otoacoustic Emissions – Tests Cochlear functionality 5. Auditory Nerve Hearing Test - three stick on electrodes, on your forehead and behind your ears, look for brain signals from headphone noise. Shows if any hearing is getting through. 6. Auditory Nerve Function Test - wire electrodes are inserted into each ear under local anesthetic and current is passed into the inner ear. I heard a "crackling" sound and some numbness of the throat. Shows that the Auditory nerve can still pass signals to the brain. Note though the results of this test ie how much crackling are not a good guide to the overall success of a cochlear implant.