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A three-frequency audiogram for use in industry.

A Sinclair, T A Smith

    British Journal of Industrial Medicine
    |August 1, 1984
    PubMed
    Summary
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    A simple 3-frequency hearing test is adequate for industrial audiometry screening. This method efficiently identifies workers with potential hearing loss, conserving resources in occupational medicine.

    Area of Science:

    • Occupational Medicine
    • Audiology
    • Public Health

    Background:

    • Comprehensive hearing conservation programs often include audiometric screening.
    • Routine 8-frequency audiometry can strain resources due to large numbers of noise-exposed workers.

    Purpose of the Study:

    • To evaluate the adequacy of a simplified 3-frequency hearing test for industrial audiometry.
    • To determine if a 3-frequency test is a resource-efficient alternative to traditional 8-frequency audiometry.

    Main Methods:

    • A 3-frequency hearing test was proposed as an initial screening.
    • 150 workers failing the 3-frequency test (threshold > 20 dB at 1, 2, or 4 kHz) underwent a full 8-frequency audiogram.
    • Numerical accuracy and diagnostic reliability were assessed.

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    Main Results:

    • The 3-frequency test results were marginally less sensitive than the 8-frequency audiogram (2.33–4.98 dB difference).
    • Diagnostic concordance between physicians was 79%-80% for the 3-frequency test.
    • Interpersonal agreement was high: 87% for the 3-frequency test and 89% for the 8-frequency test.

    Conclusions:

    • A simple 3-frequency hearing test is a practical and accurate tool for industrial audiometric screening.
    • This approach effectively identifies hearing loss in at-risk populations while conserving valuable resources.
    • The 3-frequency test aligns with legislative requirements for reasonably practicable health measures.