BAER tests are done using a specially engineered instrument by a qualified audiologist.
The hearing test known as the Brainstem Auditory Evoked Response (BAER Test) detects how sound travels from the outer ear through the middle ear to the inner ear, up the auditory brainstem to the auditory cortex.
A small needle is painlessly inserted into the crown and under each ear. An electrode is then placed on the needle. A small earphone is inserted into the ear canal. A rapid clicking sound is introduced to the dog's ear and the responding brainwave pattern is then interpreted.