<prompt> Type of tympanogram curve in otosclerosis is?AdAsAB  <response>: ANSWER: B AsREF: Dhingra 5th ed page 92See APPENDIX-48 for TYPES OF TYMPANOGRAM APPENDIX - 48Types Of Tympanogram:TypeCharacteristicCause ANormal ear canal volumeECV 1 cc, complianceNormal middle ear pressure0 daPaNormal mobilityNormal AdHigh peakNormal Ear Canal Volume Extremely Hyper flaccid Middle-earNormal Middle-ear PressureOssicular dislocation, thin TM healing post rupture, loss of elastic fibers of TMAsReduced peak Normal Ear Canal Volume Normal Middle-ear Pressure Restricted MobilityStiff system, otosclerosisB normal ear canal volumeFlat or no peak Normal Ear Canal Volume, compliance No Mobility No Middle-ear PressureFluid-filled Middle- ear Serous Otitis MediaB with large ear canal volumeECV 2 ccAbnormal Ear Canal Volume largeNo Mobility No Middle-ear PressureTM perforation or patent ventilation tubeB with small ear canal volumeECV 1 ccSmall Ear Canal Volume No Mobility No Middle-ear PressureWaxdebris or faulty probepushed against the side of the ear canalcNormal Ear Canal Volume, Restricted Mobility low amplitudeNegativesub-atmospheric middle ear pressure Peak compliance 0 negative peak outside normal rangeEustachian tube dysfunctionD notchingShows dip in the peak Sharp double peak like WAtrophic Scarred drum or hypermobile TME Ossicular chain discontinuity 