NCT02369718

Cochlear Implants : Influence of Microphone Aging and Dirtying

Consequences of Aging and Dirtying of Microphones on the Performances of Cochlear Implants. Influence of Signal Coding

• Status: Completed
• Phase: N/A
• Study type: Interventional
• Enrollment: 81 (actual)
• Sponsor: Hospices Civils de Lyon · Academic / Other
• Sex: All
• Age: 18 Years – 60 Years
• Healthy volunteers: Accepted

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.

Conditions

• Hard of Hearing

Interventions

Type	Name	Description
OTHER	Listening 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.
OTHER	Listening 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.

Timeline

• Start date: 2014-11-01
• Primary completion: 2016-04-01
• Completion: 2016-04-01
• First posted: 2015-02-24
• Last updated: 2025-09-03

Locations

1 site across 1 country: France