Open Access
CC BY-NC-ND 4.0 · Laryngorhinootologie 2020; 99(S 02): S250
DOI: 10.1055/s-0040-1711064
Abstracts
Otology

Experimental evaluation of the ADHEAR, a novel transcutaneous bone conduction hearing aid

Autor*innen

  • C Röösli

    1   UniversitätsSpital Zürich, Klinik für ORL, Hals- und Gesichtschirurgie Zürich Switzerland

  • A Huber

    1   UniversitätsSpital Zürich, Klinik für ORL, Hals- und Gesichtschirurgie Zürich Switzerland

  • I Dobrev

    1   UniversitätsSpital Zürich, Klinik für ORL, Hals- und Gesichtschirurgie Zürich Switzerland
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Background Different bone conduction hearing aids (BCHA) are comercially available with different attachment methods to the head. An experimental evaluation of the performance of a new transcutaneous (surface mounted via adhesive pad) BCHA is undertaken and compared with conventional BCHA.

Methods Pilot experiments were conducted on a Thiel embalmed whole head cadaver specimen. The electromagnetic actuators from a commercial bone conduction hearing aids (BCHA) (Baha® Power, and ADHEAR®) were used to provide stepped sine stimulus in the range of 0.1-10 kHz. Osseous pathways (direct bone stimulation or transcutaneous stimulation) were sequentially activated by mastoid stimulation via a percutaneously implanted screw (BI300), 5-Newton steel headband, and skin surface adhesion (for ADHEAR®). The response of the skull was monitored as motions of the ipsi-, top and contra-lateral skull surface as well as the ipsi- and contralateral promontory. Surface motion was quantified by sequentially measuring ~200 points on the skull surface (~ 15-20mm pitch) via a three-dimensional laser Doppler vibrometer (3D LDV) system. Analogously, single point 3D velocity measurements were done at each promontory.

Results 3D LDV data indicates that skull surface undergoes complex spatial motion with similar contributions from all motion components, under all coupling types. Actuator coupling type affects the spatial composition of the skull motion, specifically the ratio between the normal and tangent motion.

Conclusion Comprehensive experiments, including simultaneous motion across the whole skull surface and promontories, allow for detailed exploration and differentiation of various coupling methods for current and potential future BCHA.

Poster-PDF A-1394.PDF



Publikationsverlauf

Artikel online veröffentlicht:
10. Juni 2020

© 2020. The Author(s). This is an open access article published by Thieme under the terms of the Creative Commons Attribution-NonDerivative-NonCommercial-License, permitting copying and reproduction so long as the original work is given appropriate credit. Contents may not be used for commercial purposes, or adapted, remixed, transformed or built upon. (https://creativecommons.org/licenses/by-nc-nd/4.0/).

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