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Updated: May 11, 2026
06:04
Systematic Hearing Performance Evaluation Process for Adolescents with Cochlear Implantation at Early Ages
Published on: March 24, 2023
Modulation frequency discrimination with modulated and unmodulated interference in normal hearing and in
Heather A Kreft1, David A Nelson, Andrew J Oxenham
1Clinical Psychoacoustics Laboratory, Department of Otolaryngology, University of Minnesota, 420 Delaware St. SE, Minneapolis, MN 55455, USA.
Summary
Cochlear implant (CI) users struggle to distinguish simultaneous sounds based on fundamental frequency (F0). Even with temporal cues, CI users and normal-hearing listeners showed significant interference, limiting F0
Area of Science:
- Auditory Neuroscience
- Signal Processing in Hearing
- Psychoacoustics
Background:
- Fundamental frequency (F0) differences are crucial for auditory scene analysis.
- Cochlear implants (CIs) encode F0 via temporal envelope periodicity, but multi-F0 processing in CI users is unclear.
Purpose of the Study:
- To investigate the ability of cochlear implant (CI) users to process multiple fundamental frequencies (F0s) simultaneously.
- To compare multi-F0 processing in CI users versus normal-hearing (NH) listeners.
Main Methods:
- Modulation frequency discrimination thresholds were measured for sinusoidal envelopes.
- Stimuli included a target modulation (115 Hz) presented alone or with an interferer.
- Performance was assessed in both CI users and NH listeners.
Main Results:
- Discrimination thresholds significantly increased with the presence of an interferer, regardless of its modulation.
- Lower interferer modulation frequencies caused greater disruption.
- Temporal offsets between target and interferer offered minimal performance improvement.
Conclusions:
- Acoustic and electric hearing show no fundamental differences in processing single or multiple envelope-based F0s.
- Fundamental frequency (F0) differences are unlikely to be a robust cue for sound segregation in CI users.
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