Child Hearing Test

How long a child can be tested for hearing problems? And what are things too look for? PLEASE HELP

My hearing has been verified daughters when she was in kindergarten .. doctors can check in early life watching how the eardrum responds to sounds ..
One way to notice if theres some kind of hearing loss is looking at the child .. if they look into your mouth when you're talking to them, seems theyre ignoring you, or if they do not react to sounds that you think they should do or say much eh then the hearing should b checked ..

Children are the screen at birth in the United States with the screen universal newborn hearing. They can do a test right after birth sedated I think it is called brain auditory evoke potentials.

children can be diagnosed at birth with simple test-

you make a loud noise next to them and see if they react ...