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Reaction times of cochlear implant users to a change in electrode or modulation frequency in the presence of a masker

  • 0Section Neurophysics, Donders Institute for Brain, Cognition and Behaviour, Radboud University, Heyendaalseweg 135, 6525 EZ, Nijmegen, The Netherlands.
Hearing Research +

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August 7, 2025

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August 7, 2025

View abstract on PubMed

Summary

This summary is machine-generated.

Cochlear implant users

Area Of Science

  • Auditory Neuroscience
  • Biomedical Engineering
  • Speech Processing

Background

  • Cochlear implant (CI) users exhibit significant variability in spatial and temporal selectivity, impacting speech perception.
  • Direct electrode stimulation offers precise control but often lacks realistic interfering stimuli found in everyday listening environments.
  • Existing methods may not fully capture the complex interactions influencing auditory processing in CI users.

Purpose Of The Study

  • To introduce and validate the Electrode Interaction Reaction Time (ELI-RT) paradigm for assessing auditory processing in CI users.
  • To investigate how interfering stimuli affect auditory perception and information transfer along the CI electrode array.
  • To correlate objective measures from the ELI-RT paradigm with subjective speech-in-noise recognition thresholds.

Main Methods

  • Developed the ELI-RT paradigm using amplitude-modulated, interleaved pulses on closely spaced electrodes with adjacent electrode interference.
  • Administered two ELI-RT tests: '∆EL' for electrode change detection and '∆MF' for modulation frequency change detection.
  • Collected reaction time data and speech-in-noise recognition thresholds from 16 unilateral CI users.

Main Results

  • The ELI-RT paradigm effectively differentiated between participant-, electrode-, and test-specific factors.
  • Electrode location's impact on auditory perception varied significantly among participants.
  • Reaction times on ELI-RT tests correlated with speech-in-noise perception, particularly for mid-array electrodes and faster responses.

Conclusions

  • The ELI-RT paradigm provides detailed insights into the acuity of auditory information transfer in CI users.
  • Assessing reaction times to stimulation changes with interference reveals crucial aspects of central auditory pathway processing.
  • This method enhances our understanding of individual differences in CI performance and aids in optimizing auditory rehabilitation.

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