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Related Experiment Videos

Earmold configuration: relation to speech discrimination scores.

A Epstein, B Shoenut, J A Sills

    The Annals of Otology, Rhinology, and Laryngology
    |March 1, 1978
    PubMed
    Summary

    Choosing the right earmold significantly impacts hearing aid performance. Standard-long and cavernous-short earmold designs demonstrated superior audibility and speech discrimination compared to other tested types.

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    Area of Science:

    • Audiology
    • Hearing Aid Technology
    • Speech Perception

    Background:

    • Earmold selection in hearing aid fitting is highly subjective.
    • Four distinct earmold designs were evaluated: standard-long, standard-short, belled-vented, and cavernous.

    Purpose of the Study:

    • To objectively assess performance differences between various earmold designs.
    • To correlate physical measurements of earmold-receiver systems with speech discrimination outcomes.

    Main Methods:

    • Utilized monosyllabic word lists of equal difficulty to measure speech discrimination scores.
    • Measured frequency-response overall range (HAIC) for each earmold-receiver system.
    • Compared objective physical measures with subjective group responses from word identification tasks.

    Main Results:

    • Speech discrimination scores effectively differentiated earmold performance.
    • Frequency-response overall range (HAIC) aligned with group speech identification results.
    • Standard-long and cavernous-short earmolds showed superior performance across all discrimination levels (excellent, good, poor).

    Conclusions:

    • Objective measures, like frequency-response range, can predict earmold effectiveness.
    • Standard-long and cavernous-short earmolds are recommended over belled-vented and standard-short designs.
    • Evidence supports specific earmold types for improved audibility and speech clarity in hearing aid users.

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