of work: The goal of this study is to assess the predictive value of distortion product otoacoustic emissions (DPOAEs) to identify physiologic changes in hair cell function in humans exposed to acoustic overstimulation. It is hypothesized that acoustic overstimulation will result in decreased amplitude of DPOAEs. Noise exposure is known to cause a temporary decrease in hearing which appears to share common changes in cochlear physiology, such as temporal growth and recovery patterns. Resonant frequency of the outer ear has also been implicated in the magnitude of the temporary hearing loss. The secondary hypothesis states that the frequencies at which DPOAEs show maximum amplitude decrease will correspond to the resonance characteristics of the outer ear. Seven normal volunteers ranging in age from 22-29 years (mean = 23 years) have been evaluated. Repeatable responses have been recorded from all subjects and predictable decreases in DPOAE amplitude are seen. Data collection is ongoing and will continue until 12 subjects are seen.

Agency
National Institute of Health (NIH)
Institute
National Institute on Deafness and Other Communication Disorders (NIDCD)
Type
Intramural Research (Z01)
Project #
1Z01DC000030-03
Application #
6161756
Study Section
Special Emphasis Panel (LCB)
Project Start
Project End
Budget Start
Budget End
Support Year
3
Fiscal Year
1997
Total Cost
Indirect Cost
Name
National Institute on Deafness and Other Communication Disorders
Department
Type
DUNS #
City
State
Country
United States
Zip Code