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Maximum length sequences -- a fast method for measuring brain-stem-evoked responses

U Eysholdt, C Schreiner

    Audiology : Official Organ of the International Society of Audiology
    |January 1, 1982
    PubMed
    Summary
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    This study introduces a faster method for brain-stem-evoked response (BER) testing using maximum length sequences (MLS). The technique accelerates BER audiometry by sixfold while maintaining response accuracy.

    Area of Science:

    • Neuroscience
    • Audiology
    • Biomedical Engineering

    Background:

    • Conventional brain-stem-evoked response (BER) audiometry is time-consuming.
    • Efficient and accurate auditory assessment is crucial for diagnosing hearing impairments.

    Purpose of the Study:

    • To develop and validate a novel, accelerated technique for evaluating brain-stem-evoked responses (BER).
    • To assess the feasibility of using maximum length sequences (MLS) for rapid BER assessment.

    Main Methods:

    • Implementation of a pseudorandom click stimulus arrangement using maximum length sequences (MLS).
    • Utilizing deconvolution algorithms to analyze overlapping responses.
    • Comparison of results with conventional brain-stem-evoked response audiometry (BERA).

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    Main Results:

    • The MLS-based technique significantly accelerates BER evaluation by approximately six times.
    • BER patterns obtained using MLS deconvolution closely match conventional BERA results.
    • Key features of BER are preserved even at high repetition rates (up to 856 Hz).

    Conclusions:

    • The MLS technique offers a substantially faster and efficient alternative for brain-stem-evoked response assessment.
    • This method maintains diagnostic accuracy, making it suitable for clinical applications.
    • The technique demonstrates robustness at high click repetition rates, expanding its utility.