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Related Experiment Videos

TEOAE recording protocols revised: data from adult subjects.

S Hatzopoulos1, J Petrucelli, T Morlet

  • 1Department of Audiology, University of Ferrara, Italy. sdh@dns.unife.it

International Journal of Audiology
|October 23, 2003
PubMed
Summary

This study re-evaluated transiently evoked otoacoustic emission (TEOAE) protocols. Post-processed linear TEOAE recordings showed superior signal-to-noise ratios and reproducibility compared to non-linear methods.

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Area of Science:

  • Audiology
  • Otoacoustic Emissions
  • Hearing Science

Background:

  • Transiently evoked otoacoustic emissions (TEOAEs) are crucial for assessing cochlear function.
  • Current clinical TEOAE protocols utilize linear and non-linear paradigms.
  • Experimental re-evaluation is needed to optimize TEOAE testing.

Purpose of the Study:

  • To experimentally re-evaluate current clinical TEOAE protocols.
  • To compare linear and non-linear TEOAE paradigms in adult subjects.
  • To establish normative scoring criteria for TEOAEs.

Main Methods:

  • Collected TEOAE data from 42 adult subjects.
  • Elicited responses using clicks at 72 dB p.e. SPL (linear) and 84 dB p.e. SPL (non-linear).
  • Applied post-processing techniques (windowing, high-pass filtering) to linear data for artefact suppression.

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  • Utilized a repeated-measures model to compare processed linear and non-linear responses.

    • Main Results:

    • Non-processed linear and non-linear TEOAEs showed similar contours initially.
    • Post-processed linear TEOAE recordings exhibited significantly lower noise levels.
    • Linear TEOAEs demonstrated superior signal-to-noise ratios (SNRs) and higher reproducibility.
    • Normative adult scoring criteria were derived for TEOAE correlation and SNRs.

    Conclusions:

    • Post-processing enhances linear TEOAE recordings, making them advantageous.
    • Linear TEOAE protocols, when appropriately processed, offer improved noise reduction and reproducibility.
    • The study provides updated normative data for clinical TEOAE assessment.