Proposal and Evaluation of Vibration Transducer with Minimal Magnetic Field Interference for Use in IME System by in-vitro Experiment

Byung-Seop SONG  Tae-Yeon JUNG  Seung-Pyo CHAE  Myoung-Nam KIM  Jin-Ho CHO  

IEICE TRANSACTIONS on Electronics   Vol.E85-C   No.6   pp.1374-1377
Publication Date: 2002/06/01
Online ISSN: 
Print ISSN: 0916-8516
Type of Manuscript: LETTER
Category: Microwaves, Millimeter-Waves
sound vibration,  implant,  hearing aid,  transducer,  

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A new type of electromagnetic vibration transducer for use in an IME (implantable middle ear) system is presented and evaluated by in-vitro experiment. Because the new designed transducer includes two magnets glued together with the same pole facing inside the coil, it can reduce the interference from an environmental magnetic field. And the proposed transducer exhibits a high vibration efficiency and wide frequency response. Using dead human's temporal bone, in-vitro experiments were carried out and the results showed that the proposed vibration transducer will be properly used to implantable middle ear for mild to severe hearing loss patients.