Feasibility of Round Window Stimulation by a Novel Electromagnetic Microactuator
Joint Authors
Lenarz, Thomas
Salcher, Rolf
Maier, Hannes
Müller, Mathias
van Drunen, Wouter Johannes
Glukhovskoy, Anatoly
Wurz, Marc Christopher
Source
Issue
Vol. 2017, Issue 2017 (31 Dec. 2017), pp.1-8, 8 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2017-10-29
Country of Publication
Egypt
No. of Pages
8
Main Subjects
Abstract EN
Introduction.
Most implantable hearing aids currently available were developed to compensate the sensorineural hearing loss by driving middle ear structures (e.g., the ossicles).
These devices are successfully used in round window (RW) stimulation clinically, although this was initially not the intended use.
Here, a novel microactuator, specifically designed for RW stimulation, was tested in human temporal bones to determine actuator performance and applicability.
Methods.
Stapes footplate response to RW stimulation was determined experimentally in human temporal bones and the obtained sound pressure output level was estimated.
Results.
The actuator had a flat displacement response between 0.125 and 4 kHz, a resonance between 4 and 7 kHz, and a roll-off above.
At increasing contact force, the stapes footplate displacement decreased by 5–10 dB re μm for forces ≥ 2 mN.
The equivalent sound pressure level between 0.125 and 4 kHz amounted to 87–97 eq dB SPL and increased to 117 eq dB SPL for frequencies of 4–7 kHz.
The total harmonic distortion (THD) of the actuator ranged within 15–40% for static forces of 5 mN.
Conclusion.
The feasibility of an electromagnetic actuator that may be placed into the RW niche was demonstrated but requires further optimization in terms of THD and static force sensitivity.
American Psychological Association (APA)
van Drunen, Wouter Johannes& Müller, Mathias& Glukhovskoy, Anatoly& Salcher, Rolf& Wurz, Marc Christopher& Lenarz, Thomas…[et al.]. 2017. Feasibility of Round Window Stimulation by a Novel Electromagnetic Microactuator. BioMed Research International،Vol. 2017, no. 2017, pp.1-8.
https://search.emarefa.net/detail/BIM-1138069
Modern Language Association (MLA)
van Drunen, Wouter Johannes…[et al.]. Feasibility of Round Window Stimulation by a Novel Electromagnetic Microactuator. BioMed Research International No. 2017 (2017), pp.1-8.
https://search.emarefa.net/detail/BIM-1138069
American Medical Association (AMA)
van Drunen, Wouter Johannes& Müller, Mathias& Glukhovskoy, Anatoly& Salcher, Rolf& Wurz, Marc Christopher& Lenarz, Thomas…[et al.]. Feasibility of Round Window Stimulation by a Novel Electromagnetic Microactuator. BioMed Research International. 2017. Vol. 2017, no. 2017, pp.1-8.
https://search.emarefa.net/detail/BIM-1138069
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1138069