If your child has a hearing loss in both ears, two hearing aids are needed. If your child has a loss of hearing in one ear, only one hearing aid may be needed. Being able to hear from both sides is important for localization, hearing across distance, and hearing in background noise. Limiting hearing aid use to one ear if there is a loss in both ears limits your child’s ability to hear the best that they can. It also deprives the brain of the stimulation it needs to develop properly.