Abstract
(1) Kawai and Tokia have devised four methods by which the dynamical measurements of Young's modulus and the internal friction of fibers and films are possible over a wide range of frequencies. Using one of these methods, that is with audio-frequency, we measured the Young's modulus of a rectangular strip (10mmx1. 5mm; 0. 075mm thick) taken from the fresh tympanic membrane of Japanese male cadaver, and obtained the value: 4. 0x10^8 dyne/cm^2. After Bekesy, the value obtained by the statical method, was 2. 0x10^8 dyne/cm^2. (2) The Young's modulus of the tympanic membrane is nearly equal to that of the rubber, and is not variable by stress. So the tympanic membrane seems to have a rubberlike elasticity.
