Interaural Frequency and Loudness Mismatch in SSD CI Users

Completed · Not applicable

Conditions studied: Outcomes

In brief

Interaural loudness and pitch mismatch in single-sided deaf cochlear implant (SSD-CI) recipients reduces binaural processing cues and contributes to performance outcomes, specifically speech understanding in noise and localization. The study aims to improve binaural cues through speech processor program modifications that reduce interaural mismatches.

Key facts

Study ID

NCT05494632

Run by

Washington University School of Medicine

People needed

45

Starts

2022-08-12

Expected to finish

2025-08-01

Last updated by the study team

2026-03-23

Who can join

Age: 18 and older. Sex: any. Healthy volunteers: not accepted.

You may qualify if…

• Participants for the proposed study will be adults with single-sided deafness. Participants will have at least 6 months experience with their cochlear implant or will be newly implanted with the cochlear implant.
• Inclusion criteria for the experienced CI user group and the newly implant group are as follows:
• 18 years of age and older
• Postlingual onset of SSD
• Pure tone average (PTA) at 500, 1000, and 2000 Hz of less than or equal to 30 dB HL in the contralateral ear, known as the normal hearing ear
• Implanted with or chosen to be implanted with a Nucleus cochlear implant
• Full insertion of electrode array

You may not qualify if…

• • Not meeting the inclusion criteria

Where it is running

• Washington University School of Medicine — St Louis, Missouri, United States

Full record on ClinicalTrials.gov

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