Type | MGI:General | Description | tympanometry shows that tympanometric values of volume are lower at 3 weeks of age but not other ages, values of compliance are lower at all time points from 3 weeks to 8 months of age, pressure of the middle ear is more negative, mean gradient values are higher at 1 month of age and 5 month old mice show an abnormal C type curve instead of the normal A type curve in scanning tympanograms |