Immittance Audiometry is used to measure characteristics of the middle ear and its structures.
A soft probe tip is placed tightly in the ear canal for the following tests:
Uses air pressure and sound to measure the ear drum structure (to detect holes) or movement (to detect fluid build-up) and Eustachian tube function that supplies air to the middle ear space (like ear changes felt during air travel).
Measures the pathway of sound to the brain and back to the middle ear muscle. A loud sound is presented to the ear canal and any movement from the muscle behind the ear drum in response to the noise will make the ear drum move and this can be recorded in the ear canal. This tests nerve function but also can give us information about the bones of the middle ear.