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Optimization and Validation of Electric Acoustic Stimulation (EAS) Mapping as a Function of Residual Hearing After CI-Implantation
Sponsor: Luzerner Kantonsspital
Summary
The aim of this clinical study is to investigate how the fitting of an EAS (electrical acoustic stimulation) based on electrocochleography (ECochG) thresholds compares to fitting based on pure tone audiogram thresholds in terms of speech intelligibility in quiet and noise. The personal feedback from the study participants regarding the question of better fitting and the resulting sound quality should also be included in the analysis.
Key Details
Gender
All
Age Range
18 Years - 85 Years
Study Type
INTERVENTIONAL
Enrollment
12
Start Date
2026-04-20
Completion Date
2027-12-01
Last Updated
2026-03-24
Healthy Volunteers
No
Conditions
Interventions
The objective fitting method of the EAS based on the thresholds of electrocochleography is the intervention of our study.
Measured ECochG thresholds will be used in the initial EAS fitting in period 1 for sequence B. For sequence A, the ECochG-based EAS fitting (with up-to-date ECochG thresholds) will take place three months later at the beginning of period 2.
The subjective adjustment of an EAS based on thresholds from the pure tone audiogram.
The control intervention is the subjective EAS fitting based on PTAs. This is provided to sequence A at the beginning of period 1 baseline and to sequence B at the beginning of period 2.