AI Article Synopsis
- The electromagnetic middle-ear implant (MEI) is a new device designed to help with sensorineural and mixed hearing loss, and its effectiveness relies on where the transducer stimulates the ear.
- Researchers used a human-ear finite element model to evaluate how different stimulation sites (umbo, incus body, incus long process, and stapes) influence the motion of the stapes bone, comparing the results to experimental data.
- Findings indicate that low and middle frequencies show similar stapes motion with certain stimulation sites compared to normal hearing, while at high frequencies, one site aligns closely with normal hearing responses; additionally, the direction of stimulation affects sound pressure levels differently than motion types.
Article Abstract
The electromagnetic middle-ear implant (MEI) is a new type of hearing device for addressing sensorineural and mixed hearing loss. The hearing compensation effect of the MEI varies depending on the transducer stimulation sites. This paper investigates the impact of transducer stimulation sites on MEI performance by analyzing stapes spatial motion. Firstly, we constructed a human-ear finite element model based on micro-CT scanning and inverse molding techniques. This model was validated by comparing its predictions of stapes spatial motion and cochlear response with experimental data. Then, stimulation force was applied at four common sites: umbo, incus body, incus long process and stapes to simulate the electromagnetic transducer. Results show that at low and middle frequencies, stapes-stimulating and incus-long-process-stimulating produce similar spatial motion to normal hearing; at high frequencies, incus-body-stimulating produces similar results to normal hearing. The equivalent sound pressure level generated by the stapes piston motion is less sensitive to the stimulation direction than that deduced by the stapes rocking motion.
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| http://dx.doi.org/10.1002/cnm.3871 | DOI Listing |
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