http://www.kidshealth.com/parent/medical/ears/central_auditory.html
KidsHealth is the largest and most-visited site on the Web providing doctor-approved health information about children from before birth through adolescence. Created by The Nemours Foundation’s Center for Children’s Health Media, the award-winning KidsHealth provides families with accurate, up-to-date, and jargon-free health information they can use. KidsHealth has been on the Web since 1995 — and has been accessed by about half a billion visitors. On a typical weekday, more than 500,000 visitors access KidsHealth’s reliable information.