The Contributions of Age Related Changes in the Sound Localization Pathway to Central Hearing Loss
Trial Snapshot
- Phase
- Not Applicable
- Status
- Recruiting
- Enrollment
- 200
- Locations
- 1
- Primary Endpoint
- Speech in Noise Performance
Study Overview
Brief Summary
Age-related hearing loss, presbycusis, affects up to 50% of American adults. There are two main causes for presbycusis: 1) Progressive death of hair cells in the inner ear, and 2) Central hearing loss, or the reduced ability to decipher the sound source of interest from other competing sounds in a multi-source complex environment. The first cause is better understood and treatment options, such as hearing aids and cochlear implants, are available. However, central hearing loss is not as well understood and there is not a treatment available at this time. This study aims to advance our understanding of central hearing loss by evaluating the abilities of younger and older listeners in two primary outcome measures: to 1) neurologically process sound stimuli and 2) focus on conversational speech in the presence of spatially-separated competing background noise. A test using Auditory Brainstem Responses (ABR) will be used to evaluate the brain's response to clicking sounds.
This study will assess all waveform data, but will focus particularly on wave III. Sentence in noise tests will be used to assess each subject's ability to process speech in noisy situations. Both the ABR and sentence in noise tests are non-invasive and are commonly used in audiology practices to diagnosis and treat a variety of audiological pathologies.
Study Design
- Study Type
- Observational
- Observational Model
- Other
- Time Perspective
- Prospective
Eligibility Criteria
- Ages
- 40 Years to 89 Years (Adult, Older Adult)
- Sex
- All
- Accepts Healthy Volunteers
- Yes
Inclusion Criteria
- •Subjects age ranges
- •a. 21 years (inclusive) and 89years (inclusive)
- •Subjects exhibiting no poorer than a mild hearing loss, defined as hearing thresholds no worse than 40dBHL at any test frequency 250-4000 Hz based on pure tone audiometry
- •Subjects scoring 26 or higher on a screening measure of cognitive status (Montreal Cognitive Screening Assessment; MoCA)
Exclusion Criteria
- •Patients outside the age range of 21-89
- •Patients with an air-bone gap greater than 10dBHL at any frequency
- •Patients who are decisionally challenged and/or unable to complete speech perception testing. These patients are excluded based on the study requiring behavioral responses to some tests
- •Patients with little command of the English language who are unable to understand and repeat back simple everyday English sentences.
- •Illiterate patients
- •Patients with neurodegenerative diseases.
Outcomes
Primary Outcomes
Speech in Noise Performance
Time Frame: through study completion, an average of 6 years
Auditory perception task requiring participants to discriminate speech sound in quiet and in back ground noise. Takes about 90min.
Auditory Brainstem Response
Time Frame: through study completion, an average of 6 years
Non-invasive auditory electrophysiological measure of brainstem electrical activity captured using electrodes placed on the scalp while sounds are played to one or both ears. Takes about 60min
Spatial Acuity
Time Frame: through study completion, an average of 6 years
Auditory perception task requiring participants to judge the location of a sound. Takes about 90min
Secondary Outcomes
- TFS-AF(through study completion, an average of 6 years)
- Spectrotemporal Modulation(through study completion, an average of 6 years)
- Working Memory Assessment(through study completion, an average of 6 years)
- Electrocorticogram(through study completion, an average of 6 years)
- Subject Questionnaires(through study completion, an average of 6 years)