Loudness perception in patients with a cochlear implant
Conditions
Interventions
Stimuli will be created with the Bionic Ear Data Collection System (BEDCS) of
Advanced Bionics (Valencia, CA) and administered through a Harmony CI Research
Processor (CE 0123, Valencia, CA) connect
Sponsors
Leids Universitair Medisch Centrum
Eligibility
Age
18 Years to 99 Years
Inclusion criteria
Inclusion criteria: Competent adult CI-users (Advanced Bionics HiRes90K variant) Subjects understand the Dutch language Cochlear Implant received at least 9 months prior to date of first measurement CVC-scores (consonant-vowel-consonant) at least 70%
Exclusion criteria
Exclusion criteria: Subjects who are unable to complete 3 hours of psychophysical testing on a test day due to a medical condition or otherwise. Severe tinnitus Hyperacusis
Design outcomes
Primary
| Measure | Time frame |
|---|---|
| We will create and evaluate loudness curves for multiple sequentially steered modalities. In the first stage, we will look at pulse characteristics for loudness balancing like pulse ampli-tudes at threshold level (TL) and most comfortable level (MCL), pulse width, amount of sequential pulses, interpulse interval (IPI) and physical space between stimuli for the different modalities. In the second stage, we will evaluate loudness growth by matching and ranking the experimental modalities in comparison to monopolar stimulation (MP). | — |
Secondary
| Measure | Time frame |
|---|---|
| Subject characteristics possibly influencing loudness growth or discrimination abilities like electrode position in the cochlea, recent CVC scores and demographics like duration of deafness. | — |
Countries
Netherlands
Outcome results
None listed