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Related Experiment Videos

Dual response audiometry: a time-saving technique for enhanced objective auditory assessment.

S Hoth1, H Lochmann

  • 1Universitäts-HNO-Klinik, Heidelberg, Germany.

Audiology : Official Organ of the International Society of Audiology
|August 4, 1999
PubMed
Summary

Dual response audiometry (DRA) combines transient evoked otoacoustic emissions (TEOAE) and auditory brainstem responses (ABR) for improved objective hearing assessment. This efficient method enhances success rates and accuracy in auditory pathway evaluation.

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Area of Science:

  • Audiology
  • Neuroscience
  • Biomedical Engineering

Background:

  • Objective audiometric assessment is crucial for evaluating auditory function.
  • Simultaneous recording of otoacoustic emissions and brainstem responses can enhance diagnostic effectiveness.

Purpose of the Study:

  • To introduce and evaluate dual response audiometry (DRA), a novel method combining transient evoked otoacoustic emissions (TEOAE) and auditory brainstem responses (ABR).
  • To assess the efficiency and accuracy of DRA for comprehensive auditory system evaluation.

Main Methods:

  • Utilized a stimulation paradigm with click stimuli presented via an ear canal probe.
  • Recorded acoustical (TEOAE) and electrical (ABR) responses simultaneously using surface electrodes and a miniature microphone.
  • Employed artefact rejection, averaging, and signal processing techniques for both TEOAE and ABR.

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Main Results:

  • Achieved simultaneous recording of ABR and TEOAE within approximately 1 minute per run.
  • Demonstrated improved success rates and limited influence of artefacts due to signal separation.
  • Showcased enhanced accuracy in threshold determination compared to conventional ABR due to in situ stimulus level measurement.

Conclusions:

  • DRA provides complete functional integrity information of the cochlea and neural pathways efficiently.
  • The method offers advantages in signal quality estimation and robustness against noise and muscle artefacts.
  • DRA is ideally suited for infant screening and other applications requiring rapid, comprehensive auditory assessment.