This test is used to assess the status of the middle ear and related structures. This information is used in the diagnosis of middle ear disease or other problems that might restrict ear drum movement. Acoustic reflexes are measured in order to determine whether the middle ear muscles are properly reacting to loud sounds. The results can provide general information regarding hearing sensitivity. This test can also be used for neuro-diagnostic purposes, to determine if the brainstem is transmitting sound properly.
Emissions are usually present if hearing is normal or if a mild hearing loss is present.
Emissions may not be detected if there is a conductive hearing loss, middle ear involvement such as an ear infection, or with more than a mild sensorineural hearing loss.