Related Experiment Video
Updated: Feb 10, 2026
06:04
Systematic Hearing Performance Evaluation Process for Adolescents with Cochlear Implantation at Early Ages
Published on: March 24, 2023
848
Electro-tactile stimulation (ETS) enhances cochlear-implant Mandarin tone recognition
Juan Huang1, Janice Chang2, Fan-Gang Zeng3,4,5,6
1Mind and Brain Institute, Department of Biomedical Engineering, Johns Hopkins University, Baltimore, MD, 21218, USA.
Summary
Electro-tactile stimulation (ETS) can improve Mandarin tone recognition for cochlear implant users without residual hearing. This tactile approach shows similar benefits to electro-acoustic stimulation, enhancing performance by 17-18 percentage points.
Area of Science:
- Audiology
- Neuroscience
- Biomedical Engineering
Background:
- Electro-acoustic stimulation (EAS) benefits cochlear implant (CI) users with residual low-frequency hearing.
- Electro-tactile stimulation (ETS) offers a potential alternative for CI users lacking residual acoustic hearing, leveraging tactile sensation's perceptual similarities.
Purpose of the Study:
- To evaluate the efficacy of ETS in enhancing Mandarin tone recognition in noise.
- To compare ETS performance with electric and tactile stimulation alone in normal-hearing and CI users.
Main Methods:
- Two groups of Mandarin speakers (normal-hearing with CI simulation, CI users) performed a 4-alternative, forced-choice tone recognition task.
- Stimuli were presented via electric (CI or simulation), tactile, or combined ETS at a 0-dB signal-to-noise ratio.
- The study built upon previous research demonstrating ETS for English sentence recognition.
Main Results:
- Both electric and tactile stimulation alone yielded approximately 40% correct tone recognition.
- ETS significantly enhanced CI tone recognition by 17-18 percentage points.
- The magnitude of ETS enhancement was comparable to previously reported EAS effects on Mandarin tone recognition.
Conclusions:
- Tactile stimulation, via ETS, holds promise for improving Mandarin tone recognition in CI users without residual hearing.
- Optimizing ETS for this population requires transposing high fundamental frequencies to a 100-200 Hz range.
- Frequency discrimination plays a crucial role in the observed ETS benefits.
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