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Related Experiment Video

Updated: May 26, 2026

Systematic Hearing Performance Evaluation Process for Adolescents with Cochlear Implantation at Early Ages
06:04

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

Published on: March 24, 2023

Speech perception comparisons using an implanted and an external microphone in existing cochlear implant users.

Herman A Jenkins1, Kristin Uhler

  • 1Department of Otolaryngology, University of Colorado School of Medicine, Aurora, Colorado 80045, USA. Herman.jenkins@ucdenver.edu

Otology & Neurotology : Official Publication of the American Otological Society, American Neurotology Society [And] European Academy of Otology and Neurotology
|December 14, 2011
PubMed
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This study compared two cochlear implant microphones, finding the Freedom microphone generally superior for speech understanding, though the Carina microphone showed potential for future development in cochlear implant technology.

Area of Science:

  • Audiology
  • Biomedical Engineering
  • Implantable Devices

Background:

  • Cochlear implants (CIs) are vital for hearing restoration.
  • Microphone technology significantly impacts CI performance.
  • Comparing novel fully implantable microphones with established systems is crucial for advancing CI usability.

Purpose of the Study:

  • To evaluate speech understanding in cochlear implant users comparing the Otologics fully implantable Carina microphone and the Cochlear Freedom microphone.
  • To assess the feasibility and performance of the Carina microphone in conjunction with the Freedom CI system.

Main Methods:

  • A feasibility study involving direct comparison of two microphone technologies in a nonrandomized, nonblinded manner.
  • Four adult subjects with existing Cochlear Freedom CI experience participated.

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Last Updated: May 26, 2026

Systematic Hearing Performance Evaluation Process for Adolescents with Cochlear Implantation at Early Ages
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Electrically Evoked Stapedius Reflex Measurements in Cochlear Implantation and Its Application in the Postoperative Fitting Process
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  • Subjects used both microphones for half of their daily implant usage, with speech understanding assessed via CNC word scores and the BKN-SIN test.

    • Main Results:

    • All subjects perceived sound with both microphones.
    • The Freedom microphone generally yielded better Consonant-Nucleus-Consonant (CNC) word scores and performance in noise (BKN-SIN).
    • Two subjects reported poorer sound quality with the Carina, while the other two showed essential equivalence, with one noting more issues in background noise with the Carina.

    Conclusions:

    • The fully implanted Carina microphone shows potential feasibility for use with the Freedom Cochlear Implant.
    • Further advancements in signal processing and integrated device design are anticipated to improve outcomes.
    • Early observations suggest the Freedom microphone currently offers advantages in speech understanding, particularly in noisy environments.