Cochlear Implants : Influence of Microphone Aging and Dirtying

Study Results

Results pending

The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.

Basic Information

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Recruitment Status

COMPLETED

Clinical Phase

NA

Total Enrollment

81 participants

Study Classification

INTERVENTIONAL

Study Start Date

2014-11-30

Study Completion Date

2016-04-30

Brief Summary

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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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Detailed Description

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Conditions

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Hard of Hearing

Study Design

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Allocation Method

NON_RANDOMIZED

Intervention Model

PARALLEL

Primary Study Purpose

PREVENTION

Blinding Strategy

NONE

Study Groups

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Implanted subjects

Listening to 12 Fournier's lists of words

Group Type EXPERIMENTAL

Listening to 12 Fournier's lists of words

Intervention Type 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.

Normal hearing subjects

Listening to 48 Fournier's lists of words

Group Type ACTIVE_COMPARATOR

Listening to 48 Fournier's lists of words

Intervention Type 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.

Interventions

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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.

Intervention Type 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.

Intervention Type OTHER

Eligibility Criteria

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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)

Minimum Eligible Age

18 Years

Maximum Eligible Age

60 Years

Eligible Sex

ALL

Accepts Healthy Volunteers

Yes