Improved Speech Recognition Performance in Noise by Encoding Binaural Spatial Cues to the Cochlear Implant User.
Overview
- Phase
- Not Applicable
- Intervention
- Not specified
- Conditions
- Hearing Loss, Cochlear
- Sponsor
- Oticon Medical
- Primary Endpoint
- speech reception threshold (SRT) in bilateral cochlear implant user with ITD cue
- Status
- Withdrawn
- Last Updated
- 9 months ago
Overview
Brief Summary
The aim of the study is to evaluate the interaural time difference (ITD) benefit in patients with bilateral cochlear implants and to assess speech performance in noisy conditions compared to normal hearing listeners. Half of participants are bilateral cochlear implants users, while the other are normal hearing listeners.
Detailed Description
Listening in noisy environments is part of everyday life, it is based on binaural phenomena such as spatial localization.
Investigators
Eligibility Criteria
Inclusion Criteria
- •Fluent in local language
- •Normal hearing listener:
- •pure tone threshold \> 25dB from 125Hz to 12kHz
- •Cochlear implant recipient
- •bilaterally implanted 6 months at least, the second implant should be implanted 6 months at least before participant inclusion
- •Digisonic SP® cochlear implants user
Exclusion Criteria
- •binaural sensitivity threshold \< 1000µs
Outcomes
Primary Outcomes
speech reception threshold (SRT) in bilateral cochlear implant user with ITD cue
Time Frame: day 0
SRT is used as an outcome measure to quantify the acuity for speech perception in noise with Interaural Time Difference between the two ears. Signal recognition in a background noise is assessed the following conditions S0N0, S0N500, S0N1000, S-500N500 et S0Nuncorr. The noise level is constant at 65 dB SPL, the signal level is modified in the adaptive procedure in order to converge towards a score of 50% of correct response.
Secondary Outcomes
- speech reception threshold (SRT) in bilateral cochlear implant user without ITD cue and in normal hearing listeners(day 0)
- ITD sensitivity in bilateral cochlear implant user(day 0)
- Preferred jitter in bilateral cochlear implant user(day 0)