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Updated: Jul 7, 2026

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

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

Published on: March 24, 2023

Performance benefits for adults using a cochlear implant with adaptive dynamic range optimization (ADRO): a

J Müller-Deile¹, J Kiefer, J Wyss

¹ENT Clinic, Christian-Albrechts-University Kiel, Germany.

Cochlear Implants International

|February 27, 2008

Summary

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Adaptive Dynamic Range Optimization (ADRO) significantly improved speech recognition in quiet and noise for cochlear implant users. This new MAP option offers potential benefits without compromising sound perception.

Area of Science:

Audiology
Biomedical Engineering
Speech-Language Pathology

Background:

Cochlear implants (CIs) aim to restore hearing in individuals with severe to profound sensorineural hearing loss.
Standard MAP settings may not optimize speech recognition in all listening conditions for all CI users.
Advanced signal processing strategies are continuously explored to enhance CI performance.

Purpose of the Study:

To evaluate the speech recognition benefits of adaptive dynamic range optimization (ADRO) preprocessing strategy.
To compare ADRO MAP with standard MAP in experienced German-speaking Nucleus 24 CI users.
To assess both quantitative and qualitative improvements in speech perception.

Main Methods:

Prospective, single-subject, comparative study design.

Related Experiment Videos

Last Updated: Jul 7, 2026

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

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

Published on: March 24, 2023

Fifteen experienced adult CI users trialed both standard and ADRO MAPs over 5 weeks.

Speech recognition tested in quiet and noise, with subjective assessments of loudness and speech understanding.

Main Results:

ADRO MAP significantly improved speech reception thresholds (SRT) in quiet by 2.9-3.3 dB (p<0.008).
ADRO MAP significantly improved the mean signal-to-noise ratio (SNR) in noise by 1.74 dB (p=0.048).
No significant differences in loudness perception; 35% preferred ADRO MAP for speech understanding.

Conclusions:

ADRO preprocessing offers significant speech recognition benefits in quiet and noise for CI users.
ADRO MAP is a viable option, showing no performance reduction and potentially enhancing speech perception.
ADRO MAP is recommended as an additional program option for CI users to maximize auditory benefits.