918 振動増幅機能を有する機能性人工耳小骨に関する基礎検討

概要

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We prepared an artificial ear ossicle with an amplifying function of vibration by forming a piezoelectric thin film formed with the hydrothermal method on the head of a clinically used hydroxyapatite ossicle. Before forming a piezoelectric thin film on the head of hydroxyapatite ossicle, titanium coating was made on the head by sputtering. Scanning electron microscopic observation were made to check the piezoelectric thin film formation. A peeling off test with a tape was performed on the piezoelectric thin film and the tape was observed with the electron microscope to see. As the evaluation method, vibration displacements of the tip of the artificial ear ossicle caused for electric signals of audio frequency applied to the piezoelectric thin film were observed using the laser doppler vibrograph. The optimum was proposed for the piezoelectric thin film formed on the head of hydroxyapatice ossicle based on the finite element method.
2003-09-23