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Updated: Jul 3, 2026
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Systematic Hearing Performance Evaluation Process for Adolescents with Cochlear Implantation at Early Ages
Published on: March 24, 2023
[Improving speech comprehension using a new cochlear implant speech processor].
J Müller-Deile1, T Kortmann, U Hoppe
1Klinik für Hals-, Nasen-, Ohrenheilkunde, Kopf- und Halschirurgie, Phoniatrie und Pädaudiologie, Christian-Albrechts-Universität zu Kiel, Kiel, Germany. jmd@audio.uni-kiel.de
HNO
|August 8, 2008
Summary
The Freedom 24 sound processor significantly improved speech comprehension for cochlear implant (CI) users, even in noisy environments. This new processor offers enhanced hearing benefits for individuals with profound hearing loss.
Area of Science:
- Audiology
- Biomedical Engineering
- Speech Science
Background:
- Cochlear implants (CI) are crucial for profound hearing loss.
- Evaluating new sound processors requires robust clinical trials.
- Existing processors may have limitations in complex listening environments.
Purpose of the Study:
- To assess the benefits of the Freedom 24 sound processor in Nucleus 24 CI users.
- To compare speech comprehension with the Freedom 24 versus current processors.
- To evaluate the impact of advanced algorithms like ADRO and BEAM.
Main Methods:
- A multicenter clinical field study involving 48 postlingually deaf CI users.
- Baseline speech comprehension testing using the Oldenburg Sentence Test (OLSA).
- Post-upgrade evaluation using Freiburg tests and adaptive procedures in quiet and noise.
Main Results:
- Significant improvements in speech comprehension in quiet and noisy conditions with the Freedom 24.
- Adaptive Dynamic Range Optimization (ADRO) provided further gains in quiet.
- The BEAM algorithm significantly improved signal-to-noise ratio for speech comprehension thresholds.
Conclusions:
- The Freedom 24 sound processor offers significant benefits for CI users.
- Advanced algorithms enhance performance in challenging listening situations.
- A trial of the Freedom 24 is recommended for suitable CI users.