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Larger ear replica for KEMAR manikin.

R J Maxwell, M D Burkhard

    The Journal of the Acoustical Society of America
    |April 1, 1979
    PubMed
    Summary

    A new, larger external ear replica for KEMAR manikins was created for hearing aid research. This replica, based on specific ear dimensions, offers improved realism for manikin users.

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    Area of Science:

    • Acoustics and Bioacoustics
    • Audiology and Hearing Aid Technology

    Background:

    • The KEMAR manikin is a standard tool for acoustic measurements.
    • Existing manikin ear replicas may not accurately represent diverse human ear sizes.
    • Hearing aid design requires realistic acoustic environments.

    Purpose of the Study:

    • To develop a larger external ear replica for KEMAR manikins.
    • To improve the realism of acoustic simulations for hearing aid fitting.
    • To provide a more representative ear model for audiological research.

    Main Methods:

    • Selected ear dimensions from a previously established subject sample (Burkhard and Sachs, 1975).
    • Scaled ear dimensions to be two standard deviations larger than the original.
    • Employed a mirroring technique to create symmetrical left and right ear replicas.
    • Measured and compared the acoustic responses of the manikin with new and original ears.

    Main Results:

    • A larger external ear replica for KEMAR manikins was successfully developed.
    • The new replica exhibits nearly identical properties for both left and right ears.
    • Acoustic responses of the manikin with the new ears were recorded and analyzed.
    • Comparisons were made between the new and original ear replica responses.

    Conclusions:

    • The developed larger ear replica enhances the KEMAR manikin's utility for hearing aid designers.
    • This replica provides a more anatomically relevant model for audiological research.
    • The mirroring technique ensures consistent acoustic properties between left and right ears.

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