Types of OAE Test
There are four types of OAEs believed to exist:
Spontaneous otoacoustic emissions or SOAEs are spontaneous responses (sounds), i.e. without any acoustic stimuli.
Sustained-frequency otoacoustic emissions or SFOAEs are responses (sounds) to an ongoing tone.
Distortion product otoacoustic emissions or DPOAEs are responses (sounds) to two parallel tones with varying frequencies.
Transient evoked otoacoustic emissions or TEOAEs are responses (sounds) to short acoustic stimuli like clicks.
The peripheral auditory system consisting of the cochlea, outer ear, and middle ear is measured using an OAE. Even though the cochlea emits the responses or sounds, in a well functioning ear, the middle and outer ear is capable of transmitting the response sounds to the microphone recording the sounds. So, an OAE test is a method used to check the functioning of the cochlea. However, more analysis will be required to gauge individual cochlea frequency areas. Also, an OAE is not a tool to comprehensively determine your auditory functioning; it can, however, help reaffirm or question the functioning, and help gain insight in case of a lesion.