Parents should pay enough attention to an infant who gives a sound in a quiet state, who does not frown, whose limbs do not move a bit, and who does not show signs of quieting down when crying. Some parents tease the child when he reacts, is he can see your facial expressions, and the performance of facial expressions. Therefore, if a child with a hearing impairment, parents should observe when the child can not see, give a certain sound stimulation behind his back, and then observe whether he has frowned, body move a little, or cry, give a sound behind his back, shake the bell, clapping hands, to see if he has quiet down, parents can observe whether the child has hearing loss in this way. If the child does not respond to a sound when he is quiet, or if he is not quiet when he is crying, the parents should go to a hearing diagnostic facility to have the child’s hearing diagnosed to see if the child’s hearing is normal. Children like 1-3 months old who do not respond to sudden loud sounds, or older children who do not look for and turn their heads to places where there are sounds, are signs of hearing loss. So, if you have these symptoms, you should go to the hospital for a hearing diagnosis to see if your child has normal hearing.