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

Wang, Xuelin; Duan, Ke; Wang, Zhenlong; Hong, Shi

doi:10.1016/j.heares.2011.04.012

Cited by 23 publications

(18 citation statements)

References 30 publications

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“…Finite element (FE) method is capable of easily modeling the complex geometry, ultrastructural characteristics, and nonhomogenous and anisotropic material properties of human ear [10, 11]. Thus, we first constructed a middle ear finite element model.…”

Section: Methodsmentioning

confidence: 99%

An Incus-Body Driving Type Piezoelectric Middle Ear Implant Design and Evaluation in 3D Computational Model and Temporal Bone

Liu

Rao

Huang

et al. 2014

The Scientific World Journal

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A new incus-body driving type transducer relying on piezoelectric stack, with broad frequency bandwidth, is proposed for use in a middle ear implant. To aid the design process of this transducer, a coupling biomechanical model of the human middle ear and the piezoelectric transducer was established by reverse engineering technology. The validity of this model was confirmed by comparing model predicted motions with experimental measurements. Based on this verified biomechanical model, the main parameters of the transducer were determined. And its power consumption was calculated. Finally, to verify the capability of the designed piezoelectric transducer, a human temporal bone experimental platform was built. And the dynamic characteristics and the stimulated performance of the piezoelectric transducer were tested. The result showed that stapes displacement stimulated by the transducer excitation at 10.5 V RMS was equivalent to that from acoustic stimulation at 100 dB SPL, which is an adequate stimulation to the ossicular chain. The corresponding power consumption is 0.31 mW per volt of excitation at 1 kHz, which is low enough for the transducer to be used in a middle ear implant. Besides, this transducer demonstrates high performance at high frequencies.

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Section: Methodsmentioning

confidence: 99%

An Incus-Body Driving Type Piezoelectric Middle Ear Implant Design and Evaluation in 3D Computational Model and Temporal Bone

Liu

Rao

Huang

et al. 2014

The Scientific World Journal

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“…Material properties of the middle-ear components, such as TM, malleus, incus, stapes, incudomalleolar joint and incudostapedial joint, were identical to the model reported by Wang et al (2011). The TM was assumed as orthotropic material, Young's modulus was 35 MPa in radial direction and 20 MPa in the circumferential direction.…”

Section: Materials Propertiesmentioning

confidence: 95%

“…The middle-ear model has been developed and reported previously (Wang et al 2011) using the combined technologies of 3D reconstruction of the human middle ear and FE modelling. Briefly, the middle ear consisted of the tympanic membrane (TM) and three ossicular bones that were suspended in an air-filled cavity by four middle-ear suspensory ligaments and two aural muscle tendons.…”

Section: Model Geometrymentioning

confidence: 99%

Finite element modelling of human auditory periphery including a feed-forward amplification of the cochlea

Wang

Zhou

et al. 2012

Computer Methods in Biomechanics and Biomedical Engineering

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A three-dimensional finite element model is developed for the simulation of the sound transmission through the human auditory periphery consisting of the external ear canal, middle ear and cochlea. The cochlea is modelled as a straight duct divided into two fluid-filled scalae by the basilar membrane (BM) having an orthotropic material property with dimensional variation along its length. In particular, an active feed-forward mechanism is added into the passive cochlear model to represent the activity of the outer hair cells (OHCs). An iterative procedure is proposed for calculating the nonlinear response resulting from the active cochlea in the frequency domain. Results on the middle-ear transfer function, BM steady-state frequency response and intracochlear pressure are derived. A good match of the model predictions with experimental data from the literatures demonstrates the validity of the ear model for simulating sound pressure gain of middle ear, frequency to place map, cochlear sensitivity and compressive output for large intensity input. The current model featuring an active cochlea is able to correlate directly the sound stimulus in the ear canal with the vibration of BM and provides a tool to explore the mechanisms by which sound pressure in the ear canal is converted to a stimulus for the OHCs.

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“…Applying both these methods provided new insights into the vibration mode of the tympanic membrane and ossicular chain. [4][5][6][7] Vibration Mode of the Tympanic Membrane…”

Section: Basics Of Sound Transfer Of the Middle Ear-present Knowledgementioning

confidence: 99%

Sound Transfer of Active Middle Ear Implants

Beleites

Neudert

Bornitz

et al. 2014

Otolaryngologic Clinics of North America

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

Cited by 23 publications

References 30 publications

An Incus-Body Driving Type Piezoelectric Middle Ear Implant Design and Evaluation in 3D Computational Model and Temporal Bone

An Incus-Body Driving Type Piezoelectric Middle Ear Implant Design and Evaluation in 3D Computational Model and Temporal Bone

Finite element modelling of human auditory periphery including a feed-forward amplification of the cochlea

Sound Transfer of Active Middle Ear Implants

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