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Related Experiment Videos

Hearing thresholds with direct bone conduction versus conventional bone conduction.

B Håkansson, A Tjellström, U Rosenhall

    Scandinavian Audiology
    |January 1, 1984
    PubMed
    Summary
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    Unilateral versus bilateral bone-anchored hearing aids (BAHAs).

    Cochlear implants international·2008

    A novel bone-anchored hearing aid with skin penetration improves hearing thresholds by 10-20 dB. This advancement reduces discomfort and enhances electroacoustical function for patients with external ear canal issues.

    Area of Science:

    • Otorhinolaryngology
    • Biomedical Engineering
    • Audiology

    Background:

    • Traditional bone-conduction hearing aids can cause discomfort due to transducer pressure and poor electroacoustical function from skin attenuation.
    • A new bone-anchored hearing aid design with a permanent skin penetration offers a potential solution.

    Purpose of the Study:

    • To evaluate the hearing threshold improvements offered by a novel single-housing, bone-anchored hearing aid with skin penetration.
    • To compare the electroacoustical performance of this new device against conventional methods.

    Main Methods:

    • Ten patients received the new bone-anchored hearing aid with a permanent skin penetration.
    • Comparative hearing threshold measurements were conducted using Békésy audiometry and a conventional Oticon (A-type) transducer.

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    Main Results:

    • A significant lowering of hearing thresholds by 10-20 dB was observed in the 600 to 6,000 Hz frequency range after skin penetration.
    • This improvement correlated with reduced transducer distortion, lower electrical gain requirements, and decreased power consumption for a given sensation level.

    Conclusions:

    • Permanent skin penetration in bone-anchored hearing aids significantly enhances audiological outcomes.
    • The new design offers improved comfort and superior electroacoustical function compared to traditional bone-conduction aids.