Recruiting

Cochlear Implants

Sponsor:

University of Southern California

Code:

NCT04708717

Conditions

Hearing Loss

Cochlear Implants

Eligibility Criteria

Sex: All

Age: 18+

Healthy Volunteers: Accepted

Interventions

Stimulation Rate

Electrode Location

Study Details

Brief summary:

The goal of this study is to improve music and speech perception for cochlear implant users. Presently, most cochlear implants discard the temporal fine structure of sound, which is information that is widely believed to contribute to both music and speech perception. The proposed work examines perceptual and physiological changes that occur once this information is provided to cochlear implant users in a clear and consistent manner.

Conditions

Hearing Loss

Cochlear Implants

Study ID

NCT04708717

Start date

Sep 1, 2020

Status verified date

Jun, 2025

Completion date

Apr 1, 2026

Anticipated

Primary completion date

Jan 1, 2026

Anticipated

Eligibility Criteria

Eligibility Criteria

Sex: All

Age: 18+

Healthy Volunteers: Accepted

Inclusion Criteria:

  • Cochlear implant users.

Exclusion Criteria:

  • Younger than 18 years.

Study Design

Enrollment

24 participants

Anticipated

Allocation

Randomized

Intervention Model

Crossover

Primary purpose

Treatment

Interventions and Outcome Measures

Arms

experimental: Stimulation Rate

active comparator: Electrode Location

Interventions

Stimulation Rate

Psychophysical training listening to stimulation rate as a cue for auditory pitch perception. The intervention is the listening rehabilitative exercises. Exercises are completed daily as 30-minute sessions for 2 weeks.

Electrode Location

Psychophysical training listening to electrode location as a cue for auditory pitch perception. The intervention is the listening rehabilitative exercises. Exercises are completed daily as 30-minute sessions for 2 weeks.

Primary outcome measure

  • Baseline electrode psychophysics prior to training. [ Time Frame: Measure collected prior to training. ]
  • Midpoint electrode psychophysics. [ Time Frame: Measure collected at 4-week midpoint during psychophysical training. ]
  • Endpoint electrode psychophysics. [ Time Frame: Measure collected at 8-week endpoint following psychophysical training. ]

Central Contacts and Locations

Central contacts

Ray Goldsworthy, PhD

2132223384raymond.goldsworthy@med.usc.edu

Locations

University of Southern California

Recruiting

Los Angeles, California, United States, 90033

Contacts

Ray Goldsworthy, PhD

213-222-3384raymond.goldsworthy@med.usc.edu

More Information

Sponsor

University of Southern California

Last update posted

Jul 2, 2025

Last verified

Jun, 2025

Trial information was received from ClinicalTrials.gov and was last updated on 2026-09-10. This information was provided to ClinicalTrials.gov by University of Southern California on 2025-07-02.