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Variations Within Normal Hearing Acuity and Speech Comprehension: An Exploratory Study.

Nicole D Ayasse1, Lana R Penn1, Arthur Wingfield1

  • 1Department of Psychology and Volen National Center for Complex Systems, Brandeis University, Waltham, MA.

American Journal of Audiology
|May 16, 2019
PubMed
Summary
This summary is machine-generated.

Even slight hearing loss in young adults can impact understanding complex sentences. Routine hearing evaluations are recommended for individuals with normal hearing acuity.

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Area of Science:

  • Audiology
  • Cognitive Psychology
  • Speech Comprehension

Background:

  • Young adults with mild hearing loss often underestimate its impact.
  • Prior research has not explored the effects of subtle hearing variations within normal ranges on comprehension.
  • Cognitive load associated with complex linguistic structures may exacerbate undetected hearing issues.

Purpose of the Study:

  • To investigate whether slight hearing threshold variations within the clinically normal range affect spoken sentence comprehension in young adults.
  • To determine if this effect is more pronounced when sentences present a higher cognitive challenge due to complex syntax.

Main Methods:

  • Exploratory analysis of data from three published studies involving young adults (18-29 years) with normal hearing acuity (pure-tone average < 15 dB HL).
  • Participants completed comprehension tests using sentences with simple versus complex linguistic structures.
  • Product-moment correlation was used to assess the relationship between hearing acuity and comprehension accuracy.

Main Results:

  • A significant correlation was found between hearing acuity and comprehension accuracy for syntactically complex sentences.
  • No significant correlation was observed for sentences with simpler syntactic structures.
  • Partial correlations confirmed the relationship was independent of participant age.

Conclusions:

  • Slight elevations in hearing thresholds, even within normal limits, can impair spoken sentence comprehension in young adults, particularly under cognitive load.
  • Findings support limited resource models of attentional allocation.
  • Routine baseline hearing evaluations are recommended for young adults, even those with currently normal hearing acuity.