Failed otoacoustic emissions are clinically insignificant and represent problems such as cochlear hypoplasia, cochlear malformations, and neurodeafness, requiring simultaneous examination of auditory brainstem response potentials and pure tone audiometry. The otoacoustic emission examination is mainly used for newborn hearing screening, mainly newborns are examined at 3 days, 42 days and 3 months after birth to check whether there is any manifestation of neurological deafness, cochlear hypoplasia, inner ear malformation, etc., and it is necessary to fail all the three examinations in order to confirm the diagnosis. Therefore, otoacoustic emission is not passed, and then synchronized examination of auditory brainstem response potential, pure tone audiometry, acoustic impedance and stapedius muscle reflex. Mild deafness can be assisted by hearing aids. If severe neurologic deafness is diagnosed, temporal bone CT needs to be checked promptly and cochlear implantation is done.