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Cortical potentials evoked by tone frequency changes can predict speech perception in noise.

Bernard M D Vonck1, Jan A A van Heteren1, Marc J W Lammers2

  • 1Department of Otorhinolaryngology and Head & Neck Surgery, University Medical Center Utrecht, Utrecht University, Room G.02.531, P.O. Box 85500, 3508 GA, Utrecht, the Netherlands; UMC Utrecht Brain Center, Utrecht University, Utrecht, the Netherlands.

Hearing Research
|April 28, 2022
PubMed
Summary

Acoustic change complexes (ACCs) offer an objective measure for auditory processing. ACC N1 latency effectively predicts speech perception in noise, aiding clinical evaluation when behavioral tests are challenging.

Keywords:
Acoustic change complexCortical auditory evoked potentialElectroencephalographyFrequency changeFrequency discriminationHearing loss

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Area of Science:

  • Auditory Neuroscience
  • Neurophysiology
  • Audiology

Background:

  • Assessing higher-order auditory processing objectively is difficult, often relying on subjective behavioral tests.
  • Cortical auditory evoked potentials (CAEPs) offer a potential objective measure.
  • Acoustic change complexes (ACCs) are CAEPs elicited by auditory changes, investigated here for their diagnostic value.

Purpose of the Study:

  • To evaluate acoustic change complexes (ACCs) as an objective measure of auditory performance in hearing impairment.
  • To assess the influence of hearing loss and musical experience on ACCs.
  • To compare ACCs with conventional onset CAEPs.

Main Methods:

  • ACCs were recorded in normal-hearing and hearing-impaired subjects in response to frequency changes.
  • ACC amplitudes and latencies were correlated with frequency discrimination and speech perception in noise.
  • Multiple regression analysis predicted speech perception in noise using ACC measures and hearing loss.

Main Results:

  • Larger ACC N1-P2 amplitudes and shorter N1 latencies correlated with better frequency discrimination and speech perception.
  • ACC measures, unlike onset CAEPs, showed significant correlations with behavioral auditory performance.
  • ACC N1 latency and hearing loss were strong predictors of speech perception in noise, explaining 87% of the variance.

Conclusions:

  • Objective ACC N1 latency is a reliable predictor of speech perception in noise.
  • ACCs show promise as a clinical tool for evaluating auditory performance, especially when behavioral testing is unreliable.
  • Non-professional musical experience did not significantly impact ACCs or behavioral measures.