Зображення 01314. Tympanogram type B

Tympanogram type B (left ear). Different tympanogram types:

• type A (normal tympanogram): a clear peak at the ear canal pressure that equals to the tympanic cavity pressure
• type B = a flat, almost horizontal line: middle ear effusion is probable
• type C: pressure readings below –200 dPa indicate poor ventilation of the middle ear (picture [зображення 01313|Tympanogram types C and …]).