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

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Published on: March 24, 2023

Forward-Masked Frequency Selectivity Improvements in Simulated and Actual Cochlear Implant Users Using a

Florian Langner¹, Tim Jürgens²

¹Medizinische Physik, Cluster of Excellence "Hearing4all," Carl von Ossietzky University, Oldenburg, Germany Forschungszentrum Neurosensorik, Carl von Ossietzky University, Oldenburg, Germany Department of Otolaryngology, Medical University Hannover, Hannover, Germany langner.florian@mh-hannover.de.

Trends in Hearing

|September 9, 2016

Summary

This summary is machine-generated.

A new algorithm, BioAid, partially restored frequency selectivity in cochlear implant (CI) users by sharpening psychophysical tuning curves (PTCs). This demonstrates potential for improving sound processing strategies for better hearing experiences.

Keywords:

cochlear implants dynamic compression frequency selectivity tuning curves vocoder

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Area of Science:

Auditory Neuroscience
Signal Processing
Hearing Science

Background:

Frequency selectivity, crucial for hearing, is reduced in cochlear implant (CI) users.
Psychophysical tuning curves (PTCs) quantify frequency selectivity, revealing deficits in CI users compared to normal-hearing (NH) listeners.

Purpose of the Study:

To assess individual PTC shapes in CI users.
To compare CI user PTCs with simulated CI listeners.
To evaluate the effectiveness of the BioAid algorithm in sharpening PTCs for CI users and simulated listeners.

Main Methods:

Utilized a three-alternative-forced-choice forward-masking technique to measure PTCs.
Tested 8 CI users and 11 NH listeners (with and without vocoder simulation).
Applied the BioAid dynamic compression algorithm to auditory stimuli.

Main Results:

CI users exhibited flat PTCs with significant interindividual variability.
Simulated CI listeners showed similar flatness but more homogeneous PTC shapes.
BioAid partially restored frequency selectivity, sharpening PTCs in 7 of 8 CI users and in simulated listeners.

Conclusions:

The BioAid algorithm can partially improve frequency selectivity in some CI users.
Findings suggest potential for algorithm-based enhancements in CI sound coding strategies.
Improved frequency selectivity may benefit complex auditory perception, such as music perception.