Cochlear Implants : Influence of Microphone Aging and Dirtying

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.

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Key information

Conditions

Hard of Hearing Ear Diseases Hearing Disorders Hearing Loss Nervous System Diseases Neurologic Manifestations Otorhinolaryngologic Diseases Pathological Conditions, Signs and Symptoms Sensation Disorders Signs and Symptoms

Age range

18 year–60 year

Sex eligibility

All sexes

Study type

Interventional

Phase

Not applicable

Primary location

Pavillon ORL (U) - Hôpital Edouard Herriot

Lyon, 69437, France

Who can participate

Healthy volunteers accepted: Yes

Only the study team can determine whether someone qualifies for participation.

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)

Treatment and study plan

Listening to 12 Fournier's lists of words

Other

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 words

Other

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.

Primary outcomes

Percentage of correct syllable recognition

Time frame: At day 1

French "spondee lists"

Sponsors and collaborators

Lead sponsor

Hospices Civils de Lyon

Other

Registry information

Official study title

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

Important dates

Study start: 2014
Primary completion: 2016
Study completion: 2016
First posted: Feb 24, 2015
Registry last updated: Sep 3, 2025

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

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This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

Published trials that share one or more normalized conditions with this study.

Completed