These are measures to partially estimate hearing function and to determine which function of the auditory system is at fault. They’re commonly used for children who can’t be tested behaviourally (due to age, developmental delay, or other medical conditions), as well as adults who are unable to participate in a standard test battery (due to cognitive impairment).
Diagnostic Oto-Acoustic Emissions
This test assesses the outer hair cell functioning of the cochlea. It is commonly used to screen newborn hearing and to assess tinnitus.
Auditory Brainstem Response (ABR)
This test gives the audiologist information about the cochlea and neural pathways for hearing. ABRs are common to test hearing in the following populations: To assess or screen ‘at-risk’ infants, like babies who have not passed the OAE assessment, have spent more than five days in NICU, have a low birth weight, or have low APGAR scores.
To assess difficult-to-test populations, including children with cerebral palsy, developmentally delayed children or children with medical conditionsTo confirm hearing loss in medico-legal casesTo diagnose auditory disorders, such as auditory neuropathyTo conduct intra-operative monitoring; for example, during the removal of tumours on the 8th cranial nerve (vestibulocochlear nerve).
Electrocochleography (ECochG / ECOG) Test
This test is used to confirm the diagnosis of Meniere’s Disease, as well as during intra-operative monitoring or to assist in the diagnosis of auditory neuropathy disorder.