Some electrophysiological tests are the auditory brainstem response (ABR) test, auditory steady-state response (ASSR) testing, electroencephalic audiometry (EEG) test, and otoacoustic emission testing (OAE).
Auditory steady-state response (ASSR) testing also involves monitoring recorded responses from the scalp of tones at varying frequencies.
If ABR or ASSR testing is done under sedation, then the child may not eat for several hours prior to administration of the drugs.