Hearing tests for infants under the age of one are not uncommon at audiology centers today, and toddlers and children in the late preschool years make up a large part of the audiology testing population. What should parents be aware of when consulting with these young patients? Hearing tests for infants and children can be divided into awake tests and sleep tests according to the requirements of the audiometric instruments. Awake hearing tests are mainly play audiometry, which requires the child to be in a good mood and willing to cooperate. You can bring your child a favorite toy. For children who are able to hear and play, it is best to do intensive training at home a few days before the test. Children who wear hearing aids must wear them, pay attention to checking the status of the machine, and bring spare batteries. Parents should arrange their diet according to the time of the test, and should not be too full or fasting during the examination. Next is clothing. It is best to wear a cardigan for medical appointments to make it easier to put on and take off. If the child is in a state of illness such as a cold, it is best to reschedule the appointment for another time. If the child is well coordinated, the examination can be completed within 20 minutes. Younger children with more severe hearing loss may take longer. Parents should be patient and actively cooperate with the doctor, and should not scold or scold their children. Otoacoustic emissions and auditory brainstem evoked potentials are important components of the hearing examination for patients with suspected hearing loss, and are also required before surgical procedures such as cochlear implantation, which requires the patient to minimize movement of other parts of the body, preferably while sleeping. Most children rely on medications to fall asleep, except for infants who can fall asleep naturally after nursing and feeding. Most hearing centers use chloral hydrate, which is a sedative with minimal side effects and a fast onset of action; the downside is that it tastes bitter and parents should bring their own “sweetener” such as yogurt and juice. There are also some sedative-hypnotic injections for use. Parents should be reminded that regardless of the type of sedative medication used, sleep preparation the night before the examination is indispensable, i.e., let the child’s sleep time be reduced to half the usual length, or shorter. Do not wear moisturizer on the day of the test because the skin is prepared for the auditory brainstem evoked potential test. Depending on the requirements of the test, the test can take anywhere from 30 to 90 minutes.