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High-frequency audiometry. Normative studies and preliminary experiences.

E Laukli, I W Mair

    Scandinavian Audiology
    |January 1, 1985
    PubMed
    Summary

    The Demlar 20K high-frequency audiometer reliably measures hearing above 8 kHz. This tool aids in distinguishing noise-induced hearing loss from age-related hearing loss (presbycusis) and assessing middle ear surgery outcomes.

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    Area of Science:

    • Audiology
    • Otoacoustic Emissions
    • Hearing Science

    Background:

    • Conventional audiometry typically assesses hearing up to 8 kHz.
    • High-frequency hearing loss (8-20 kHz) is increasingly recognized as significant.
    • New diagnostic tools are needed to evaluate this range effectively.

    Purpose of the Study:

    • To evaluate the clinical utility and reproducibility of the Demlar 20K high-frequency audiometer.
    • To assess the potential applications of high-frequency audiometry in clinical practice.

    Main Methods:

    • Routine clinical use of the Demlar 20K over 3 years in patient groups and controls.
    • Test-retest reliability studies were conducted.
    • Comparison with conventional audiometry was performed.

    Main Results:

    • The Demlar 20K demonstrated comparable reproducibility to conventional audiometry.
    • While inter-subject variation was noted, individual test-retest reliability was acceptable.
    • The technique showed promise in differentiating noise-induced hearing loss from presbycusis.

    Conclusions:

    • The Demlar 20K is a clinically viable instrument for high-frequency hearing assessment (8-20 kHz).
    • High-frequency audiometry can be a valuable tool for differential diagnosis of hearing loss.
    • It may also aid in evaluating the efficacy of middle ear surgical interventions.

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