Tympanometry is a complementary/additional study of the diagnosis of ear disorders. To do this, a device, a tympanometer registers the mobility of the eardrum, the pressure in the middle ear, the pressure gradient and the capacity of ear canal, and the result is displayed graphically as a tympanogram. This is the only study that allows to objectively diagnose the so-called glue ear or exudative otitis media in medical language. Following a treatment, a tympanogram can be used to assess the healing state of the disease.