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National Center for Rehabilitative Auditory Research (NCRAR)


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Research volunteers needed

Registered nurse administers a hearing test

Researchers at NCRAR are looking for research participants for numerous studies. If you meet any of the following criteria, we probably have a study you could take part in: By participating in research, you contribute to helping others by advancing scientific knowledge. 

Below you will find a list of studies that are currently recruiting subjects. Click on the study title to learn more about each research opportunity.

Study  Contact Hearing Loss Normal Hearing Tinnitus
This study collects information about military noise, hearing, tinnitus, and other health concerns to better understand the long-term effects of military noise exposure.
Subjects: Veterans within 2.5 years of leaving active military service (DD-214) or the Guard/Reserves.
Research Assistant: Anneka: (503) 220-8262, ext. 55949
Physiological Assessment of Auditory Processing Disorders in TBI
This study examines how concussion and/or exposure to explosive blasts affects how the brain processes sound.
Subjects: Both with or without concussion since 2001.
Research Assistant: Chan: (503) 220-8262, ext. 56651  
Resolving the Paradox of Hearing Complaints with a Normal Audiogram
The purpose of this study is to develop a clinical test that can assess the strength of the neural connections between the inner ear and the brain.
Subjects: Non-Veterans with normal hearing aged 18-35 or Veterans with normal hearing aged 19-50 that also have an auditory complaint such as tinnitus, hyperacusis, or difficulty with speech understanding.
Research Assistant: Joey: (503) 220-8262, ext. 51996  
Validation and Expansion of Established Norms for Measures of Tinnitus Perception
This study measures tinnitus using a computerized system.
Must have constant tinnitus (ringing, humming, buzzing noise in the ears or head)
Research Assistant: ShienPei: (503) 220-8262, ext. 57385
Predictive Correlates of Ototoxicity
This study investigates the effects of specific chemotherapy drugs on the ability to hear and understand speech.
Subjects: 18 years of age or older and plan to receive cisplatin, carboplatin, or oxaliplatin as part of their cancer care.
Research Audiologist: Michelle: (503) 220-8262, ext. 51089
Towards Development of a Mobile Assessment and Differential Diagnosis of Auditory Disfunction: Hidden Hearing Loss and Central Auditory Processing Disorders
We are conducting a study to develop an efficient and easy-to-administer test of hearing and speech understanding for Veterans and Servicemembers.
Subjects: Hearing loss: None to mild hearing loss as we are looking at hidden hearing loss.
Research Assistant: Greg: (503) 220-8262, ext. 53796
Evaluating Possible Auditory and Psychological Biomarkers of Sound Intolerance
The purpose of this study is to understand the body’s response to everyday sounds, which some people find too loud, overwhelming, or painful.
Subjects: Veterans and non-Veterans, 18 years or older, with normal hearing or a mild hearing loss. 
Research Assistant: Chan: (503) 220-8262, ext. 56651

OR you can email us at with the following information:

  • Your phone number (Note: VA security regulations prohibit us from responding to you via email).
  • Do you have normal hearing? (yes/no)
  • Do you have hearing aids? (yes/no)
  • Do you have tinnitus? (yes/no)
  • Age
  • Are you a Veteran? (yes/no)
  • Where are you located? (city and state only!)