When infants are particularly young, most of their hearing is not fully developed, and their response is poor, so loud talking generally does not affect their hearing, but in particularly serious high-decibel situations, it can cause puncture of the tympanic membrane of the child, thus affecting the hearing and causing hearing loss. Speaking loudly in the baby’s ear although it will not directly affect the hearing situation, but the sound of more than 70 decibels, the long-term persistence of the existence of the baby will cause noise, which will affect the child’s neurological state, there may be irritable, crying more than the reaction of inattention, may also cause damage to the auditory nerve, it is recommended that the baby’s ear when talking, the sound as far as possible, do not be too loud. Too loud a voice may cause the infant’s nervous system reaction, affecting the normal development of the body, long-term persistence will also cause damage to the auditory nervous system, thus affecting the hearing. In daily life, when watching TV, you should control the volume and try to roar loudly in the infant’s ear, so as to avoid damage to the auditory nerve system and affect hearing.