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Related Experiment Videos

High frequency Bekesy audiometry: II. Threshold test procedure, reliability and validity

M T Gauz, W A Ahroon, S D Roberts

    The Journal of Auditory Research
    |January 1, 1981
    PubMed
    Summary
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    This study evaluated a modified audiometer for high-frequency hearing loss (HF HTL) testing. The fixed-frequency mode demonstrated reliable and valid results for assessing high-frequency hearing thresholds.

    Area of Science:

    • Audiology
    • Hearing Science
    • Medical Instrumentation

    Background:

    • Conventional audiometers are limited in assessing high-frequency hearing thresholds.
    • Accurate measurement of high-frequency hearing thresholds (HF HTLs) is crucial for early detection of hearing impairments.
    • Existing methods for HF HTL assessment require evaluation for reliability and validity.

    Purpose of the Study:

    • To evaluate the reliability and validity of a modified Grason-Stadler E-800 audiometer (HF E-800) for high-frequency hearing threshold (HF HTL) assessment.
    • To compare the performance of the HF E-800 in fixed-frequency mode against a conventional audiometer.
    • To recommend optimal procedures for HF HTL measurement.

    Main Methods:

    • Twenty normal-hearing participants produced Bekesy threshold tracings using a conventional audiometer (2-8 kHz) and the modified HF E-800 (2-20 kHz).

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  • Half the participants then completed tracings using the HF E-800 in a fixed-frequency mode.
  • Test-retest differences and reliability coefficients were calculated for both devices and modes.

    • Main Results:

    • The modified HF E-800 in fixed-frequency mode demonstrated high reliability, with test-retest differences of 1-4 dB.
    • Reliability coefficients from the HF E-800 were comparable or superior to the conventional audiometer.
    • Slightly reduced validity coefficients were observed, potentially due to transducer coupling differences.

    Conclusions:

    • The HF E-800 unit, particularly in its fixed-frequency mode, is a reliable tool for assessing high-frequency hearing thresholds (HF HTLs).
    • The pulsed-tone fixed-frequency procedure is recommended for accurate HF HTL assessment.
    • This modified unit offers confidence in evaluating high-frequency hearing capabilities.