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Related Experiment Videos

Age- and gender-specific reference ranges for hearing level and longitudinal changes in hearing level

C H Morrell1, S Gordon-Salant, J D Pearson

  • 1Mathematical Sciences Department, Loyola College, Baltimore, Maryland 21210, USA.

The Journal of the Acoustical Society of America
|October 1, 1996
PubMed
Summary

This study establishes age-specific hearing level change reference ranges for adults, crucial for identifying abnormal hearing changes and monitoring occupational hearing health.

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Area of Science:

  • Audiology
  • Gerontology
  • Biostatistics

Background:

  • Age-related hearing decline is common but varies individually.
  • Existing hearing references often lack longitudinal data or rigorous health screening.
  • Accurate normative data is needed for early detection of hearing issues.

Purpose of the Study:

  • To present age-specific reference ranges for hearing level and its change over time.
  • To provide normative data for hearing changes in adults without otological disorders.
  • To establish a baseline for detecting deviations from normal hearing progression.

Main Methods:

  • Utilized data from the Baltimore Longitudinal Study of Aging with rigorous health screening.
  • Constructed longitudinal percentiles using smoothed means and standard deviations.

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  • Employed skew-normal distribution for cross-sectional change percentiles to account for asymmetry.

    • Main Results:

    • Developed age-specific percentile curves for hearing level changes up to 15 years.
    • Data accounts for age-related variations in hearing levels.
    • Percentiles are based on individuals screened for hearing loss and otological conditions.

    Conclusions:

    • These novel reference curves offer standards for tracking hearing changes over time.
    • They aid in diagnosing hearing problems and monitoring hearing in occupational settings.
    • Provides a valuable tool for understanding normal versus abnormal hearing trajectories.