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Auditory sensation, commonly called hearing, involves the transformation of sonic waves into neural impulses facilitated by the structures of the auditory organ. The prominent, flesh-like structure on the side of the head, called the auricle, directs sound waves towards the auditory canal. The auricle is often mislabeled as the pinna, a term more aligned with mobile structures like a feline's external ear. The auditory canal penetrates the cranium via the external auditory meatus of the...

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Extracting the Cochlea from a Human Temporal Bone: A Cadaveric Protocol

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A totally implantable hearing system--design and function characterization in 3D computational model and temporal

Rong Z Gan¹, Chenkai Dai, Xuelin Wang

¹University of Oklahoma, Norman, OK 73019, USA. rgan@ou.edu

Hearing Research

|September 24, 2009

Summary

This study introduces a totally implantable hearing system (TIHS) for sensorineural hearing loss. The research focuses on the mass loading effect and electromagnetic coupling efficiency of this innovative implantable hearing device.

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Area of Science:

Biomedical Engineering
Otolaryngology
Medical Devices

Background:

Implantable middle ear hearing devices offer a promising solution for mild to moderately severe sensorineural hearing loss.
Existing technologies often involve external components, necessitating a fully implantable system for improved patient convenience and aesthetics.

Purpose of the Study:

To report on a totally implantable hearing system (TIHS) under investigation.
To analyze the mass loading effect and electromagnetic coupling efficiency of the TIHS using finite element modeling and cadaveric data.

Main Methods:

Development of a 3D finite element model of the human ear.
Analysis of electromagnetic coupling between the implantable coil and magnet.
Evaluation of mass loading effects on residual hearing with a passive implant.
Testing of functional gain across human skin in preliminary whole-unit assessments.

Main Results:

The study determined the mass loading effect of a passive implant on hearing.
Efficiency of electromagnetic coupling between the implanted coil and magnet was quantified.
Preliminary data on the whole unit's functional gain were presented.

Conclusions:

The finite element model provides a robust platform for analyzing TIHS performance.
Understanding mass loading and electromagnetic coupling is crucial for optimizing TIHS design.
Further investigation into the whole unit's functional gain is warranted.