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Abstract
A method for studying the middle ear mechanics is described. It is a further development of a method described by Ingelstedt et al. (1967). The basic principle is the recording of the volume deviation of the tympanic membrane during and after changes of the ambient as well as the intratympanic pressure. The method permits quantitative studies of the elastic properties of the tympanic membrane system during both static and dynamic pressure conditions. The volume of the closed airfilled middle ear can be determined, as can the tubal function during both static and dynamic conditions. A new way to determine the middle ear pressure is presented.