Evaluation of implantable actuators by means of a middle ear simulation model

Bornitz, Matthias; Hardtke, H.‐J.; Zahnert, Thomas

doi:10.1016/j.heares.2010.02.007

Cited by 46 publications

(46 citation statements)

References 23 publications

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“…As an ideal electromagnetic transducer is a force driven transducer (which provides a certain force without limitations in displacement) [13], all the exciting forces generated by these electromagnetic transducers were simulated using a sinusoidal force applied directly onto the transducer along the piston direction of stapes displacement (as shown in Figure 3). This direction was selected since it is the most efficient driving direction for all of the three types of transducers [13].…”

Section: Transducer Modelsmentioning

confidence: 99%

“…This direction was selected since it is the most efficient driving direction for all of the three types of transducers [13].…”

Section: Transducer Modelsmentioning

confidence: 99%

“…To figure out which type of electromagnetic transducers is efficient for hearing loss compensation, Stieger et al conducted a comparative experimental study and concluded that the FMT generates smaller displacements at low frequencies (<800 Hz), while the IBDT is efficient over the entire frequency range [12]. In contrast, based on computer simulations, Bornitz et al reported a different result that the IBDT performance is worse than other types of electromagnetic transducers [13].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Transducer Type and Design Influence on the Hearing Loss Compensation Behaviour of the Electromagnetic Middle Ear Implant in a Finite Element Analysis

Liu

Yang

et al. 2014

Advances in Mechanical Engineering

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Several types of electromagnetic transducer for the middle ear implants (MEIs) have been developed as an alternative to conventional hearing aids for the rehabilitation of sensorineural hearing loss. Electromagnetic transducer type and design are thought to have a significant influence on their hearing compensation performance. To investigate these effects, a middle ear computational model was constructed based on a complete set of microcomputerized tomography section images of a human ear. Its validity was confirmed by comparing the model predicted motions with published experimental measurements. The result shows that the eardrum driving transducer (EDT) is superior to the floating mass transducer (FMT) in hearing compensation when the transducer mass is small but inferior to the FMT when the mass gets bigger. The incus body driving transducer (IBDT) is the most ineffective type of transducer for hearing compensation. Moreover, the masses of the EDT and the FMT decrease the transducer performance mainly at higher frequencies: the greater the transducer mass, the lower the displacement of the stapes excited by these transducers. On the other hand, the IBDT driving rod stiffness decreases transducer's performance severely at low frequencies and its adverse effect on transducer performance increases with the decrease of the stiffness of the IBDT driving rod.

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Section: Transducer Modelsmentioning

confidence: 99%

“…This direction was selected since it is the most efficient driving direction for all of the three types of transducers [13].…”

Section: Transducer Modelsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Transducer Type and Design Influence on the Hearing Loss Compensation Behaviour of the Electromagnetic Middle Ear Implant in a Finite Element Analysis

Liu

Yang

et al. 2014

Advances in Mechanical Engineering

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“…However, its performance depends on not only the frequency characteristic of the actuator, but also the mass, attachment location and mounting parameters (Abel et al, 2004;Needham et al, 2005;Perkins et al, 2010). In the existing literature, performance of transducers has been evaluated in several aspects: (a) mass loading effect on residual hearing (Gan et al, 2001;Needham et al, 2005;Nishihara et al, 1993;Perkins et al, 2010;Rosowski et al, 2007); (b) equivalent sound pressure output (Bornitz et al, 2010;Perkins et al, 2010;Rosowski et al, 2007); (c) feedback gain (Bornitz et al, 2010;Perkins et al, 2010) and (d) non linear distortion or sound fidelity (Hong et al, 2009;Rosowski et al, 2007). It is difficult to determine the impact of systematic variations of one or more mounting parameters by temporal bone experiments.…”

Section: Introductionmentioning

confidence: 99%

“…They reported that the further position resulted in a clear reduction in the stapes footplate displacement. Using two measures: equivalent sound pressure and ratio of equivalent sound pressure to radiated sound pressure, Bornitz et al (2010) evaluated the influence on the performance of implantable hearing aids depending on the type of actuator, the attachment point and the direction of excitation at the ossicular chain. However, Bornitz's model of the actuator was rigidly fixed to the attachment point.…”

Section: Introductionmentioning

confidence: 99%

Finite element analysis of the coupling between ossicular chain and mass loading for evaluation of implantable hearing device

et al. 2011

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Effect of electromagnetic middle‐ear implant simulating sites on the stapes spatial motion: A finite element analysis

Zhang,

Liu,

Zhou

et al. 2024

Numer Methods Biomed Eng

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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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Evaluation of implantable actuators by means of a middle ear simulation model

Cited by 46 publications

References 23 publications

Transducer Type and Design Influence on the Hearing Loss Compensation Behaviour of the Electromagnetic Middle Ear Implant in a Finite Element Analysis

Transducer Type and Design Influence on the Hearing Loss Compensation Behaviour of the Electromagnetic Middle Ear Implant in a Finite Element Analysis

Finite element analysis of the coupling between ossicular chain and mass loading for evaluation of implantable hearing device

Effect of electromagnetic middle‐ear implant simulating sites on the stapes spatial motion: A finite element analysis

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