Optimization of Cochlear Implants and Hearing Aids

Principal Investigator

Lina Reiss

Study Purpose

The goal of this research is to study how children combine sounds between the two ears, and how this may explain some of the variability in speech and music perception abilities for children with hearing loss. We are also studying how age and development in children affects how sounds are combined between ears.

Medical Condition(s)

Pitch perception, binaural integration

Eligibility Criteria

Children will qualify for the study if they are 6-8 years of age, and have either:
1) Normal hearing
2) Moderate to profound sensorineural hearing loss in both ears, and
a) wear hearing aids in both ears, or
b) wear a hearing aid in one ear and a cochlear implant in the other ear, or
c) wear cochlear implants in both ears.

Age Range

2 - 99

Healthy Volunteers Needed


Duration of Participation

In this study, we will evaluate children annually during development, with repeat testing once a year for five years. The time commitment each year is a total of 5-6 hours, which can be divided into up to five shorter sessions of 1-2.5 hours per session.

Minors Included



Gem Stark or 503-494-2996
Lina Reiss, Ph.D. or 503-494-5868.


National Institutes of Health

Recruitment End


Compensation Provided



Compensation will be provided for your child’s time ($10+/hour), transportation costs ($0.25/mile), and parking.

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