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Interaural Frequency and Loudness Mismatch in SSD CI Users

NCT05494632 · Status: COMPLETED · Phase: NA · Type: INTERVENTIONAL · Enrollment: 45

Last updated 2026-03-23

Study results available
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Summary

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.

Conditions

  • Outcomes

Interventions

DEVICE

Treatment-modifications to CI speech processor program. Specifically reducing interaural frequency mismatch in experienced SSD-CI recipients.

We will modify the CI speech processor program to reduce interaural frequency mismatch between the CI ear and the contralateral ear in experienced CI recipients with SSD.

DEVICE

Treatment-modifications to CI speech processor program to reduced interaural frequency mismatch in newly implanted SSD-CI recipients.

We will modify the CI speech processor program to reduce interaural frequency mismatch between the CI ear and the contralateral ear in newly implanted CI recipients with SSD.

DEVICE

Treatment-modifications to CI speech processor program to reduced interaural loudness mismatch in experienced SSD-CI recipients.

We will modify the CI speech processor program to reduce interaural loudness mismatch between the CI ear and the contralateral ear in experienced CI recipients with SSD.

Sponsors & Collaborators

  • Cochlear

    collaborator INDUSTRY

  • Washington University School of Medicine

    lead OTHER

Principal Investigators

  • Jill B Firszt, PhD · Washington University School of Medicine

Study Design

Allocation
NON_RANDOMIZED
Purpose
TREATMENT
Masking
NONE
Model
SINGLE_GROUP

Eligibility

Min Age
18 Years
Sex
ALL
Healthy Volunteers
No

Timeline & Regulatory

Start
2022-08-12
Primary Completion
2024-07-30
Completion
2025-08-01
FDA Device
Yes

Countries

  • United States

Study Locations

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Read the full study record

This page highlights key information. For complete eligibility criteria, study locations, investigator contacts, and the full protocol, visit the original record on ClinicalTrials.gov.

View NCT05494632 on ClinicalTrials.gov