Failure of hearing test in one ear may be caused by blockage of foreign cerumen in the ear, neurodeafness, uncooperative crying, etc. It is recommended to review the test. 1. Foreign body cerumen blockage in the ear: Newborns may have amniotic fluid or tissue secretion in the ear, which affects sound conduction and leads to the failure of the hearing test. It is recommended to remove the foreign body from the ear, and then return to the clinic in time to have the hearing test repeated. 2. Neurological deafness: The auditory nervous system can be damaged by abnormal genes during the mother’s pregnancy and delivery, resulting in hearing loss and deafness, and the symptoms of neurological deafness include hearing loss, tinnitus, vertigo and nausea. 3. Crying and uncooperative: some newborns may have a continuous crying reaction during the hearing screening, which will affect the results of the hearing screening at this time, so there may be a situation where one ear cannot pass the test. Newborns do not pass the hearing test, it is recommended to go to the hospital in time to retest, and timely examination, targeted treatment.