The OAE (Otoacoustic Emissions) test checks part of the inner ear's response to sound. The OAE test is used to find out how well your inner ear, or cochlea, works. OAE or otoacoustic emission testing is the recording of sounds that the ear produces itself. An Otoacoustic Emissions Test is a form of diagnostic testing for hearing. The primary purpose of otoacoustic emission (OAE) tests is to. Otoacoustic Emissions Test (OAEs) · If a baby hears normally, an echo is reflected back into the ear canal and is measured by the microphone · When a baby has a.