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Systematic Hearing Performance Evaluation Process for Adolescents with Cochlear Implantation at Early Ages

Systematic Hearing Performance Evaluation Process for Adolescents with Cochlear Implantation at Early Ages

Published on: March 24, 2023

Using temporal modulation sensitivity to select stimulation sites for processor MAPs in cochlear implant listeners.

Soha N Garadat¹, Teresa A Zwolan, Bryan E Pfingst

¹Kresge Hearing Research Institute, Department of Otolaryngology, University of Michigan, Ann Arbor, MI, USA. s.garadat@ju.edu.jo

Audiology & Neuro-Otology

|July 25, 2013

Summary

Optimizing cochlear implant (CI) processor maps by selecting electrode sites based on temporal acuity improved consonant and sentence recognition in noise. This personalized approach shows promise for enhancing CI user outcomes.

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Area of Science:

Audiology
Neuroscience
Biomedical Engineering

Background:

Temporal acuity, measured by modulation detection thresholds (MDTs), varies across cochlear implant (CI) activation sites and is subject-specific.
Previous research indicated that better across-site mean (ASM) MDTs correlate with improved speech recognition in CI users.

Purpose of the Study:

To test the feasibility of a site-selection approach for optimizing CI processor maps in a clinical setting.
To investigate if revising CI maps by deactivating sites with poor temporal acuity improves speech recognition.

Main Methods:

Twelve CI recipients participated in the study.
A site-selection procedure based on MDTs in the presence of a masker was used to create experimental processor maps.
Frequencies were reallocated to remaining electrodes after selected sites were turned off.

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Behavioral Determination of Stimulus Pair Discrimination of Auditory Acoustic and Electrical Stimuli Using a Classical Conditioning and Heart-rate Approach

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Main Results:

The experimental CI processor map, utilizing site selection based on temporal acuity, led to significant improvements in consonant recognition.
Recognition of sentences in noise was also enhanced with the experimental map compared to the clinical map.
Vowel recognition performance decreased with the experimental map, potentially due to reduced spectral resolution.

Conclusions:

Personalized CI processor-fitting strategies based on psychophysical measures of temporal acuity offer a promising method for improving recipient outcomes.
Site selection based on temporal acuity can enhance speech understanding in challenging listening conditions for CI users.