Cochlear Implants : Influence of Microphone Aging and Dirtying

August 26, 2025 updated by: Hospices Civils de Lyon

Consequences of Aging and Dirtying of Microphones on the Performances of Cochlear Implants. Influence of Signal Coding

Cochlear implant microphones are subject to aging and dirtying. The evolution may affect their efficiency. Several signal coding strategies are used in cochlear implants and their behaviour may be more or less affected by the aging process. In this work the investigators wish to assess this phenomenon.

Study Overview

Status

Completed

Conditions

Intervention / Treatment

Study Type

Interventional

Enrollment (Actual)

81

Phase

  • Not Applicable

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Locations

  • France
      • Lyon, France, 69437
        • Pavillon ORL (U) - Hôpital Edouard Herriot

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

18 years to 60 years (Adult)

Accepts Healthy Volunteers

Yes

Description

Inclusion Criteria:

  • French speaking persons (French native speakers; studies made in French)
  • Ear, Nose and Throat (ENT) tests and check up for normal hearing listeners were normal (Hearing loss below 20 dBs for all frequencies situated in the 250-8000 Hz range)
  • Not mentally retarded

Exclusion Criteria:

  • Persons with tinnitus or headache
  • Anxious people (taking psychiatric drugs)
  • Mental alteration or mental retard
  • Deafened persons or taking an ENT treatment (normal hearing listeners)

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: Prevention
  • Allocation: Non-Randomized
  • Interventional Model: Parallel Assignment
  • Masking: None (Open Label)

Arms and Interventions

Participant Group / Arm
Intervention / Treatment
Experimental: Implanted subjects
Listening to 12 Fournier's lists of words
Other: Listening to 12 Fournier's lists of words
Patients will listen to words from Fournier's lists of words in presence of noise presented at different Signal to Noise Ratio (SNR). 6 disyllable words Fournier's lists are presented to the implantees: SNRs ranged from 0 to 15 decibels (dBs) (0; 3; 6; 9; 12; 15) ; the subjects repeat orally the words. Then microphone is cleaned and, again, 6 Fournier's lists are presented.
Active Comparator: Normal hearing subjects
Listening to 48 Fournier's lists of words
Other: Listening to 48 Fournier's lists of words
48 disyllable Fournier's lists of words are presented to the subjects (6 SNR*2 coding strategies*4 dirtying levels) and the subjects repeat orally the words. Dirtying levels will be simulated by sounds effects.

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Percentage of correct syllable recognition
Time Frame: At day 1
French "spondee lists"
At day 1

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Hospices Civils de Lyon

Publications and helpful links

The person responsible for entering information about the study voluntarily provides these publications. These may be about anything related to the study.

General Publications

  • P.A. Cucis, C. Berger-Vachon, E. Truy, H. Thai Van, F. Millioz, S. Gallego; "Cochlear Implants : Influence of the Coding Strategy on Syllable Recognition in Noise" AMSE JOURNALS-AMSE IFRATH Publication -2016: Modelling C; vol. 77; no 2; pp 84-97; 2016.
  • P.A. Cucis, E. Veuillet, E. Truy, H. Thai Van, F. Millioz, S. Gallego; "Coding Strategy Robustness related to Microphone Integrityin Cochlear Implantsusing the Recognition of Syllables in a Noisy Environment"; AMSE JOURNALS-2016-Series: Advances B; vol. 59; no 1; pp 15-30; 2016.
  • P.A. Cucis, E. Veuillet, E. Truy, H. Thai Van, F. Seldran, S. Gallego; "Effect of Microphone Cleaning on Syllable Recognition Performed by Cochlear Implant Users using the CIS and NofM Coding Strategies"; AMSE JOURNALS-2016-Series, Advances B; vol. 59; no 1; pp 31-45; 2016.
  • P.A. Cucis, C. Berger-Vachon, E. Truy, H. Thai Van, F. Seldran, S. Gallego ; " Apport du nettoyage du microphone sur la reconnaissance de syllabes par des sujets implantés cochléaires selon les stratégies de codage CIS et N of M" ; Les Cahiers de l'Audition ; vol 29 ; no 5 ; pp 18-23 ; 2016.
  • P.A. Cucis, C. Berger-Vachon, E. Truy, H. Thai Van, F. Millioz, S. Gallego " Influence de la stratégie de codage de l'implant cochléaire sur la reconnaissance de syllabes en milieu bruité en fonction de l'encrassement du microphone " Les Cahiers de l'Audition, vol 29, no 5, pp 12- 17, 2016.
  • P.A. Cucis, C. Berger-Vachon, E. Truy, H. Thai Van, F. Millioz, S. Gallego; " Influence de la stratégie de codage de l'implant cochléaire sur la reconnaissance de syllabes en milieu bruité " Congrès Handicap 2016, IFRATH, Paris, 2016.

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start

November 1, 2014

Primary Completion (Actual)

April 1, 2016

Study Completion (Actual)

April 1, 2016

Study Registration Dates

First Submitted

January 22, 2015

First Submitted That Met QC Criteria

February 17, 2015

First Posted (Estimated)

February 24, 2015

Study Record Updates

Last Update Posted (Estimated)

September 3, 2025

Last Update Submitted That Met QC Criteria

August 26, 2025

Last Verified

August 1, 2025

More Information

Terms related to this study

Additional Relevant MeSH Terms

Other Study ID Numbers

  • 2014.873

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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