Hard of Hearing
Conditions
Brief 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.
Interventions
OTHERListening 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.
OTHERListening 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.
Sponsors
Hospices Civils de Lyon
Study design
Allocation
NON_RANDOMIZED
Intervention model
PARALLEL
Primary purpose
PREVENTION
Masking
NONE
Eligibility
Sex/Gender
ALL
Age
18 Years to 60 Years
Healthy volunteers
Yes
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)
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| Percentage of correct syllable recognition | At day 1 | French spondee lists |
Countries
France
Outcome results
None listed