鼓膜のヤング率および減衰係数について

抄録

Temporal bones are extracted from fresh cadavers, and the condition of only the ear-drum attachment to the temporal bone is made. Then, the dynamical characteristics of the ear-drum of the specimen are measured with a newly developed measuring apparatus. At the same time, applying the impedance theory of the tube to the external auditory canal and the energy method to the ear-drum, the equation corresponding to the output of the apparatus is obtained. Comparing the measurement results and the numerical results, the Young's modulus E_E and Damping parameterξ_E=c_E/2 (m_Ek_E) ^1/2 are determined to be E_E=3.25×10⁸ dyn/cm² andξE=0.158.