Deafness, Bilateral, Deafness Neurosensory, Deafness Permanent
Conditions
Keywords
Cochlear Implant, Speech Perception, Hearing, Speech, Prosthesis Fitting, Rehabilitation
Brief summary
The main objective of this study is to assess the effectiveness of an integrated program of fitting and training interventions aimed at reducing unexpected variability and addressing the specific error patterns of each recipient. The participants will undergo 1 visit lasting approximately 2 hours at the Radboud university medical center's ENT department, where they will undergo a series of diagnostic tests. Some of the participants will also be asked to self-administer additional tests using a Windows tablet. Based on the outcomes of speech recognition tests in quiet at the first visit, the participants will be called for follow-up interventions concerning both the fitting of their CI and personalized auditory training based on their personal error patterns. These interventions will take place over the course of approximately 5 months and will be made up of three follow-up visits and a period of self-administered training through a mobile application on a tablet. One final follow-up visit will check whether any changes from the interventions are retained after four weeks.
Interventions
DIAGNOSTIC_TESTTone Audiometry
Evaluation of the participants' audiometrical thresholds
DIAGNOSTIC_TESTSpectrotemporal Assessment
Evaluation of the participants' promptness in detecting a modulation of a harmonic complex
DIAGNOSTIC_TESTPhoneme and Speech Perception
Evaluation of the participants' understanding of phonemes and short words, both in quiet and in noise
DIAGNOSTIC_TESTDigit Triplet Test
Evaluation of the participants' ability to discern speech in noise
OTHERPersonalized fitting
Adjustment of the parameters of the participants' cochlear implants aimed at improving their speech perception
BEHAVIORALPersonalized training
Self-administered training exercises focused on the speech components the participants are experiencing difficulties into
Sponsors
Cochlear
Radboud University Medical Center
Study design
Allocation
NA
Intervention model
SINGLE_GROUP
Primary purpose
TREATMENT
Masking
NONE
Eligibility
Sex/Gender
ALL
Age
18 Years to No maximum
Healthy volunteers
No
Inclusion criteria
* Adult (over 18 years old at the time of inclusion ) * Post-lingually deafened (the subject had a good mastery of spoken language before onset of deafness) * Native Dutch speaker * Implanted, either unilaterally or bilaterally, with a Cochlear Implant manufactured by Cochlear Ltd (i.e., a Nucleus ® implant). * Implanted with one of the following implants: CI422, CI512, CI522, CI532, CI24M, CI24R, CI24RE. * Implanted for at least 12 months.
Exclusion criteria
* Known abnormally formed cochlea * Known pre-implantation ossification of the cochlea * Severe cognitive disorders affecting their ability to understand spoken language * Intense facial nerve stimulation * Unaddressed electrode tip foldover * More than 4 electrodes deactivated because of malfunction (open/short circuit) or lack of response * Additional illnesses or handicaps that could impact ability to participate in study, at the clinician's discretion.
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| Change in Percent Speech Recognition | Weeks 1, 10, 14, 18 | Given a list of CNC words, this score measures the percentage of correctly identified words. |
Secondary
| Measure | Time frame | Description |
|---|---|---|
| Change in Distance-based Accuracy Score | Weeks 1, 10, 14, 18 | Speech Recognition accuracy score based on phoneme distance, such that mistaking a phoneme for a similar one such as mistaking /k/ for /g/ gives a lower penalty than mistaking a phoneme for a very different one. |
| Change in Error Dispersion | Weeks 1, 10, 14, 18 | Mathematical quantification of how much the errors made by the subjects are spread between stimuli and responses |
Countries
Netherlands
Contacts
Primary ContactWendy Huinck, PhD
Outcome results
None listed