<prompt> Type Ad curve is seen in-Eustachian tube obstructionAfter stapedectomyMiddle ear tumoursSecretory otitis media  <response>: Ans. is b i.e., After stapedectomy Types of tvmpanograms on impedencc audiometryCURVEDISEASEA curve Normal peak height and pressureNormalEustachian tube obstructionAs curve It is also a variant of normal tympanogram but may be shallowOtosclerosis Tumors of middle earFixed malleus syndrome TympanosclerosisAD curve Variant of normal with high peakOssicular discontinuityPost stapedectomyMonometric ear drumBcurveFlat or dome shaped curve Indicating lack of complianceFluid in middle earSecretory otitis mediaTympanic membrane perforationGrommet in earC curvenegative peak pressureRetracted tympanic membraneFaulty function of eustachian tube eustachian tube obstruction 