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Related Experiment Videos

Occlusion effect in bone conduction pure tone and speech audiometry

B J Edgerton, D A Klodd

    Journal of the American Audiology Society
    |January 1, 1977
    PubMed
    Summary

    The occlusion effect (OE) for hearing tests was investigated. Placement and occlusion methods significantly influenced OE results, differing from previous findings.

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    Area of Science:

    • Audiology
    • Hearing Science

    Background:

    • The occlusion effect (OE) is a phenomenon in audiology where covering the ear canal alters bone conduction thresholds.
    • Previous research has established typical OE values, but discrepancies exist, necessitating further investigation.

    Purpose of the Study:

    • To determine the occlusion effect (OE) for pure tone and spondee stimuli.
    • To investigate factors influencing OE, including placement and type of occlusion.

    Main Methods:

    • Experiment I: Measured OE for bone conduction speech reception thresholds using mastoid placement and unilateral occlusion.
    • Experiment II: Assessed OE for pure tone stimuli with unilateral and bilateral occlusion, and mastoid and forehead placement.

    Main Results:

    • Experiment I yielded a mean OE of 4.67 dB for bone conduction speech reception thresholds, lower than some previous reports.
    • Experiment II revealed significant differences in OE based on placement (mastoid vs. forehead) and occlusion type (unilateral vs. bilateral).

    Conclusions:

    • Placement and occlusion methods significantly impact the measured occlusion effect.
    • Further research is needed to reconcile current findings with established OE values.

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