Hearing Loss
Conditions
Keywords
cochlear implants, power consumption,
Brief summary
Reducing power consumption in the cochlear implant is crucial to the development of future smaller sound processors. The commercial MP3000 sound coding strategy has been shown to be more efficient in power consumption to the standard ACE strategy. However in order to develop smaller sound processors, further battery life power savings are required. The aim of this study is to evaluate three experimental sets of MP3000 parameter sets, compared against the default ACE program. In the background for each of the four strategies, experimental noise reduction programs (SpatialNR and NR3) will also be in use. In an additional phase of the study, low stimulation rate ACE programs will also be evaluated against the default stimulation rate.
Interventions
DEVICEMP3000 sound coding strategy or ACE strategy with lower stimulation
Sponsors
Royal Victoria Eye and Ear Hospital
Cochlear
The Hearing Cooperative Research Centre
Study design
Allocation
RANDOMIZED
Intervention model
SINGLE_GROUP
Primary purpose
TREATMENT
Masking
NONE
Eligibility
Sex/Gender
ALL
Age
18 Years to No maximum
Healthy volunteers
No
Inclusion criteria
1. Adult (\>18 years) cochlear implant recipients 2. Implanted with the CI500, CI24RE and Nucleus 24 Series and CI422 cochlear implants. 3. User of commercially available Freedom, CP810 or CP900 series sound processor 4. User of the ACE strategy or MP3000 strategy 5. At least 3 months experience with the cochlear implant 6. Native speaker in the language used to assess speech perception performance 7. Willingness to participate in and to comply with all requirements of the protocol
Exclusion criteria
1. Additional handicaps that would prevent participation in evaluations 2. Unrealistic expectations on the part of the subject, regarding the possible benefits, risks and limitations that are inherent to the procedure and investigational device
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| Word recognition scores in quiet | Testing over 18 weeks | Word recognition scores in quiet for i) MP3000 strategy compared to default ACE strategy and ii) lower rate stimulation for ACE strategy |
| Sentence recognition scores in quiet | Testing over 18 weeks | Sentence recognition scores in quiet for i) MP3000 strategy compared to ACE strategy and ii) lower rate stimulation for ACE strategy |
Secondary
| Measure | Time frame | Description |
|---|---|---|
| Fundamental frequency (F0) discrimination | Testing over 18 weeks | F0 discrimination for MP3000 strategy compared to the ACE baseline |
| Speech intelligibility and helpfulness subjective ratings | Testing over 18 weeks | For MP3000 strategy compared to the default ACE baseline |
| Sentence in noise scores | Testing over 18 weeks | Comparison of MP3000 program with Spatial NR and NR3 enabled versus disabled. |
Countries
Australia
Outcome results
None listed