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COAEs and SSOAEs in adults with increased age
1Communication Sciences and Disorders, Syracuse University, New York, USA.
Ear and Hearing
|October 1, 1995
Summary
Age does not significantly impact click-evoked otoacoustic emissions (COAEs) in individuals with similar hearing thresholds. The presence of synchronized spontaneous OAEs (SSOAEs) and hearing loss are more influential factors on COAEs than age alone.
Area of Science:
- Audiology
- Otoacoustic Emissions
- Gerontology
Background:
- Aging is commonly associated with increased hearing thresholds and outer hair cell deterioration.
- Evoked otoacoustic emissions (EOAEs) are reported to decrease with age.
- The specific influence of aging on EOAEs, independent of hearing threshold, remains unclear.
Purpose of the Study:
- To compare click-evoked otoacoustic emissions (COAEs) between age groups with similar auditory thresholds.
- To investigate whether age influences COAEs beyond its effect on hearing thresholds.
Main Methods:
- COAE input/output functions and synchronized spontaneous OAEs (SSOAEs) were measured.
- Two subject groups were studied: younger (19-29 yrs) and older (40-61 yrs), matched for auditory thresholds.
- Mixed-model ANOVAs were used to analyze differences in COAEs based on age group.
Main Results:
- No statistically significant differences in COAE level or threshold were observed between the age groups.
- Significant differences in COAEs were found based on the presence of measurable SSOAEs, irrespective of age.
Conclusions:
- Age does not significantly diminish COAE level or elevate COAE threshold.
- Factors such as the presence of SSOAEs and overall hearing loss have a greater impact on COAEs than chronological age.
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