Due to the sensitivity of the hearing screening instrument, the baby’s hearing screening does not necessarily mean that the baby has hearing problems, there may be the following reasons: 1, the baby’s external ear canal and middle ear cavity may have residual amniotic fluid, fetal fat, etc., which cause attenuation of the incoming stimulus sound and the outgoing response signal, resulting in the weakening or disappearance of otoacoustic emission energy, resulting in the hearing screening “not This results in the illusion of a “failed” hearing screening. With the absorption or discharge of amniotic fluid and fetal fat, the baby will usually pass the screening. 2, the baby is not asleep at the time of the examination, more body movement, or the baby’s nose blocked breathing, or the surrounding environment noise, etc., will affect the results of the screening. 3, premature babies and low birth weight babies may not be mature neurological development, hearing screening during hospitalization does not pass is temporary, with the development of body organs, 42 days after delivery when the hearing screening rate will be significantly increased.