NCT03877211

Channel Interaction in Cochlear Implant and Speech Understanding in Noise

Impact of Channel Interaction on Cochlear Implant Performances in Noise : Influence of the Number of Maxima.

• Status: Completed
• Phase: N/A
• Study type: Interventional
• Enrollment: 28 (actual)
• Sponsor: Hospices Civils de Lyon · Academic / Other
• Sex: All
• Age: 18 Years – 60 Years
• Healthy volunteers: Accepted

Summary

The goal of this study is to take into account channel interaction in the cochlear implant (CI) fitting process. Designing a fast and accurate method of measurement would help to customize the fitting procedures to patients' specificities in order to maximize speech understanding in every day conditions especially in noise.

Conditions

• Cochlear Implants

Interventions

Type	Name	Description
OTHER	speech audiometry in noise	Subjects will be asked to repeat lists of words played by speakers in a noisy environment generated by the same speakers. A percentage of correct recognition is calculated for each list.
OTHER	Psychophysical tuning curves in forward masking	Sounds of variable center frequency are used as maskers, and a tone with a fixed frequency at a fixed level is the target. What is tested here is the level of masker that just masks the target.
OTHER	Electrically-evoked Auditory Brainstem Response (EABR)	Channel interaction assessment using eABRs (auditory nerve responses). The method consists of two measurements: 1) eABR measurements with stimulation by a single electrode of the cochlear implant at 70% of the dynamic range (four different electrodes are tested); 2) Measurement of a single eABR with stimulation from all four electrodes at 70% of the dynamic range. A comparison of the eABRs obtained by these two measurements, indicates the electrical and neural interactions between the electrodes.
OTHER	Tonal audiometry	Tonal audiometry will be performed with headphones
OTHER	Auditory canal examination	Otoscopic examination of external auditory canal and eardrum

Timeline

• Start date: 2019-02-24
• Primary completion: 2021-02-18
• Completion: 2021-02-18
• First posted: 2019-03-15
• Last updated: 2025-09-04

Locations

1 site across 1 country: France