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Related Experiment Video

Updated: Dec 27, 2025

Performing Intracochlear Electrocochleography During Cochlear Implantation

Performing Intracochlear Electrocochleography During Cochlear Implantation

Published on: March 8, 2022

Utilizing Electrocochleography as a Microphone for Fully Implantable Cochlear Implants.

William Jason Riggs¹, Meghan M Hiss¹, Jeffrey Skidmore¹

¹Department of Otolaryngology, Head & Neck Surgery, The Ohio State University College of Medicine, Columbus, OH, USA.

Scientific Reports

|March 1, 2020

Summary

This summary is machine-generated.

Researchers explored using the inner ear

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Area of Science:

Biomedical Engineering
Neuroscience
Audiology

Background:

Current cochlear implants (CIs) are semi-implantable, requiring external components.
A fully implantable CI offers significant recipient benefits but faces challenges with subdermal microphone technology.
Existing microphone technology can cause sound distortion and signal attenuation under the skin.

Purpose of the Study:

To investigate an alternative sound input method for fully implantable hearing devices.
To assess the feasibility of using the electrocochleography (ECochG) response as a microphone.
To evaluate the capture of speech properties from the ECochG signal.

Main Methods:

Electrophysiological recordings were performed on 14 adult and pediatric participants.
The study captured speech properties from the electrocochleography (ECochG) response.
Formant properties of /da/ and /ba/ stimuli were evaluated across different hearing loss levels.

Main Results:

Preliminary results demonstrate the feasibility of using ECochG as a microphone.
Vital speech properties were captured within the ECochG response.
Degradation of formant properties was observed across varying degrees of hearing loss.

Conclusions:

Proof-of-concept achieved for utilizing ECochG as a sound source microphone for fully implantable hearing technology.
Further signal processing refinement is necessary.
Intracochlear recording locations may improve signal fidelity.