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Non-linguistic auditory speech processing.

Robert H Margolis1,2, Aparna Rao1, Richard H Wilson1

  • 1Speech and Hearing Science, College of Health Solutions, Arizona State University, Tempe, Arizona.

International Journal of Audiology
|April 4, 2022
PubMed
Summary
This summary is machine-generated.

This study developed a novel auditory processing test using distorted speech. Performance declined with age and hearing loss, suggesting "hidden hearing loss" impacts speech perception.

Keywords:
Speech recognitionbackward speechdistorted speechhearing impairmentspectro-temporal analysisspeech perceptionsynaptopathy

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Area of Science:

  • Auditory Neuroscience
  • Speech Processing
  • Psychoacoustics

Background:

  • Auditory processing deficits can occur with age and hearing loss.
  • Non-linguistic speech-like stimuli may offer a language-independent assessment method.
  • Distinguishing between normal and impaired auditory function is crucial.

Purpose of the Study:

  • To develop and evaluate a method for testing auditory processing using non-linguistic, speech-like stimuli.
  • To assess the impact of age and hearing loss on auditory processing.
  • To explore the utility of backward-distorted speech as a diagnostic tool.

Main Methods:

  • Developed a test using temporally reversed and spectrally/level-matched monosyllabic words.
  • Recruited three groups: normal-hearing, seniors, and participants with hearing loss (≥35 dB HL).
  • Participants discriminated between distorted and undistorted stimuli.

Main Results:

  • Significant performance differences were observed across the three groups.
  • The Hearing Loss group performed worse than the Senior group, who performed worse than the Normal group.
  • Age and hearing loss independently impacted speech discrimination abilities.

Conclusions:

  • Age-related hearing decline and hearing loss significantly impair auditory processing of distorted speech.
  • The observed performance decline in seniors may be linked to cochlear synaptopathy or "hidden hearing loss".
  • Backward-distorted speech discrimination is a promising, language-independent measure for assessing auditory processing.