Audiogram. Worried about your baby's hearing? Exam by a pediatric ENT is best, followed by audiogram (hearing test) by a pediatric audiologist, will get you the facts. A pediatric audiologist can test the hearing system of any age baby or child.
Failure to respond. If your baby is not startling to loud noises, that is a potential sign. Your baby should be turning to localize sounds coming from one direction or the other. Lastly, as your baby gets older, he or she should be babbling and cooing- failure to generate sounds at the appropriate age may be a reason to screen his or her hearing. If you have any doubts, discuss them with your pediatrician.