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Design study of a Miniaturized Displacement Transducer (MDT) for an active middle ear implant system

: Kaltenbacher, Dominik; Schächtele, Jonathan; Goll, Erich; Burkhardt, Claus; Arnold, Heinz; Dalhoff, Ernst; Zenner, Hans-Peter


Biomedical microdevices 16 (2014), No.6, pp.805-814
ISSN: 1387-2176
Bundesministerium für Bildung und Forschung BMBF
16SV5811; ICASImplantat
Intracochlear Acoustic Simulator Implant
Journal Article
Fraunhofer IPA ()
piezoelectrical actuator; Implantat

People suffering from moderate to severe hearing loss can be treated with active middle ear implants. A new approach in this field is to implant an electromechanical transducer onto the round window membrane in order to improve coupling and be able to treat patients with middle-ear problems. In this paper the design study for a miniaturized displacement transducer (MDT) for the round window is presented. Based on a requirement analysis, the basic principle and analytical modeling of the actuator is shown. A parameter variation study results in an optimized actuator configuration that is able to generate an amplification of 110 dB SPL theoretically. As a next step this actuator has to be manufactured and tested.