Tympanometry generates a graphic curve known as a tympanogram. A tympanogram yields information about the mobility of the tympanic membrane and, indirectly, about the possible presence of middle ear effusion. It is used to support otoscopic findings and clarify diagnosis. The examination is safe, fast and painless. A normal tympanogram (a curve with an obvious peak; picture ) excludes the possibility of middle ear effusion . An abnormal tympanogram does not disclose whether the patient has acute otitis media (AOM) or otitis media with effusion (OME, "glue ear") .