When it comes to tinnitus, hyperacusis, acoustic shock, balance disorders, etc.it is important to check whether the hearing system is functioning properly.
The hearing is measured with an audiometer, an electronic device that produces pure tones in its basic version and is used to determine the hearing threshold. When there is hearing loss, a distinction can be made between conductive (otosclerosis, fluid in the ear) or sensory neural hearing loss (presbyacusis, sound trauma).
Before a measurement of auditory acuity can be performed, it is necessary to check whether the ear canal is free of cerumen (earwax).
An audiometry is performed in a low-noise cabin. The sound is delivered via headphones and when the patient perceives the sound offered, he raises his hand.
The sound offered will only be able to achieve an uncomfortable loudness level very exceptionally. People with tinnitus or hyperacusis will not be affected by this test.
Oto-acoustic emissions (OAEs)
An OAE test can be performed to verify that the outer hair cells of the inner ear function normally. This test is more sensitive than an audiometry and requires no extra cooperation from the patient, except that he must keep quiet and move as little as possible.
DPOAEs provide information about every frequency between 500 Hz and 8000 Hz especially in the context of tinnitus or a noise trauma, performing a DPOAE can mean added value.