Hard of HearingNCT02369718
Cochlear Implants : Influence of Microphone Aging and Dirtying
A study testing Listening to 12 Fournier's lists of words and Listening to 48 Fournier's lists of words in people with Hard of Hearing, run by Hospices Civils de Lyon at 1 site in France.
Trial summary
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. Read more about this study
- Who is it for?
- Ages 18 to 60 yearsHealthy volunteers can take part
- Conditions the study is for
- Hard of Hearing
- What is being tested?
- Listening to 12 Fournier's lists of words and Listening to 48 Fournier's lists of words
- Type of treatment
- Pill or oral medicine
- Could I receive a placebo?
- No, everyone receives an active treatment
- How many people
- 81 participants
- Where
- 1 siteFrance
- Study dates
- Nov 2014to Apr 2016
- Phase
- Interventional
- Are there results?
- None posted in the registry
Key requirements
Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.
- Ages 18 to 60 years
- All sexes
- Healthy volunteers accepted
- Adult
Who may be able to join
- 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
Who cannot join
- 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)
Trial locations and contacts
1 site in 1 country.
About this study
Official title: 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.
- Conditions
- Hard of Hearing
- Being tested
- Listening to 12 Fournier's lists of words, Listening to 48 Fournier's lists of words
- Medical subject headings
- Hearing Loss
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
Listening to 12 Fournier's lists of wordsOther
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.
Listening to 48 Fournier's lists of wordsOther
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.
| Study group | Role | What they receive |
|---|---|---|
| Implanted subjects | Experimental | Listening to 12 Fournier's lists of words Receives: Other: Listening to 12 Fournier's lists of words |
| Normal hearing subjects | Active comparator | Listening to 48 Fournier's lists of words Receives: Other: Listening to 48 Fournier's lists of words |
What is being measured
The primary outcome is the main question the study is designed to answer.
Percentage of correct syllable recognition
French "spondee lists"
Measured: At day 1
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted24 Feb 2015 (estimated)
- Study startNov 2014
- Primary completionApr 2016
- Study completionApr 2016
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Publications (6)Papers the sponsor has linked to this study.
- Other trials for Hard of HearingStudies of the same condition, open and under way.
- More trials run by Hospices Civils de LyonThe sponsor's other registered studies.
- What the trial phases meanHow a treatment moves from first tests in people to approval.
More details
For doctors and researchers: how the study is designed, who runs it, and its registry IDs.
Study design
- Study type
- Interventional
- Phase
- Phase N/A
- Primary purpose
- Prevention
- Allocation
- Non-randomised
- Intervention model
- Parallel groups
- Masking
- None (open label)
- Enrolment
- 81 participants (actual)
Sponsor and investigators
- Lead sponsor
- Hospices Civils de Lyon
- Sponsor type
- University, hospital or other
- Responsible party
- Sponsor
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT02369718
- Sponsor's protocol ID
- 2014.873
- Status last verified
- Aug 2025
- First submitted
- 22 Jan 2015
- Last updated
- 3 Sep 2025
- Results posted
- No
- Data monitoring committee
- No
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, 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.
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.
Study at a glance
From the registry record, last updated by the sponsor on 3 Sep 2025. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- Consequences of Aging and Dirtying of Microphones on the Performances of Cochlear Implants. Influence of Signal Coding
- ClinicalTrials.gov ID
- NCT02369718
- Acronym / sponsor ID
- 2014.873
- Conditions
- Hard of Hearing
- Study type
- Interventional
- Recruitment status
- Completed
- Enrolment
- 81 participants (actual)
- Lead sponsor
- Hospices Civils de LyonUniversity, hospital or other
- Study start
- Nov 2014
- Primary completion
- Apr 2016 (actual)
- Study completion
- Apr 2016 (actual)
- First posted
- 24 Feb 2015 (estimated)
- Results
- Not posted in the source record
Clinical summary
The research question as the sponsor registered it. This describes what the study plans to test, not what it found.
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 design
- Primary purpose
- Prevention
- Allocation
- Non-randomised
- Intervention model
- Parallel groups
- Masking
- None (open label)
- Number of arms
- 2
| Arm | Type | Receives |
|---|---|---|
| Implanted subjects | Experimental | Other: Listening to 12 Fournier's lists of wordsListening to 12 Fournier's lists of words |
| Normal hearing subjects | Active comparator | Other: Listening to 48 Fournier's lists of wordsListening to 48 Fournier's lists of words |
Who may qualify
- Ages
- 18 to 60 years
- Sex
- All
- Healthy volunteers
- Accepted
- Age groups
- Adult
Key inclusion criteria (3 listed)
- 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
Key exclusion criteria (4 listed)
- 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)
Eligibility is decided by the study team after screening; this overview does not establish that a patient qualifies. Full inclusion and exclusion criteria.
Interventions
| Intervention | Type | Arms |
|---|---|---|
| Listening to 12 Fournier's lists of wordsPatients 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. | Other | Implanted subjects |
| Listening to 48 Fournier's lists of words48 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. | Other | Normal hearing subjects |
Primary outcome
Percentage of correct syllable recognition
Time frame: At day 1
French "spondee lists"
Results and safety
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 3 Sep 2025.
- BackgroundP.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.
- BackgroundP.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.
- BackgroundP.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.
- BackgroundP.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.
- BackgroundP.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.
- Results publicationP.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.
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Referral and contact
AzTrials does not enrol participants or take referrals. Contact the study team or a site listed below; they decide who can take part. This study is not recruiting at the moment.
The record lists no contact. Use the official record to reach the sponsor.
1 site in 1 country: see every site and its status.
Questions about this trial
What is this clinical trial studying?
A study testing Listening to 12 Fournier's lists of words and Listening to 48 Fournier's lists of words in people with Hard of Hearing, run by Hospices Civils de Lyon at 1 site in France.
The full registered description is in the About this study section and the official record.
Who may be eligible to take part?
The sponsor lists 3 inclusion and 4 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.
Is this clinical trial currently recruiting?
The record says: finished, as of the sponsor's last update on 3 Sep 2025. Status can change between updates, so confirm with the study contact before making plans.
Where is the study taking place?
The record lists 1 site in France. Whether a site is taking part right now should be confirmed with that site. See every site.
What are the possible benefits and risks?
They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.
Are results available for this study?
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
How can a doctor refer a patient or contact the research team?
The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.
What does the primary outcome measure?
Percentage of correct syllable recognition (time frame: At day 1). It is what the study was designed to measure, not a finding.
Where can I read the original study information?
On the ClinicalTrials.gov record for NCT02369718, which also lists 6 linked publications.
Does a listing mean the treatment is approved or proven to work?
No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.
How often is this information updated?
AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 3 Sep 2025.