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Reliability of individual differences in degraded speech perception.

Kathy M Carbonell1

  • 1Department of Speech, Language and Hearing Sciences, University of Florida, Gainesville, Florida 32610, USA kathycarbonell@phhp.ufl.edu.

The Journal of the Acoustical Society of America
|December 3, 2017
PubMed
Summary

Individual differences in speech perception are reliable across sessions and robust across various speech degradation types. These findings suggest stable underlying factors influence the ability to understand challenging auditory information.

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Area of Science:

  • Auditory Neuroscience
  • Speech Perception
  • Psychoacoustics

Background:

  • Speech perception abilities vary significantly in challenging listening conditions.
  • The source of this variability (stable individual differences vs. measurement error) is not well understood.

Purpose of the Study:

  • To investigate the reliability and consistency of individual differences in speech perception across different degradation methods.
  • To determine if performance variations in degraded speech perception are stable over time and across tasks.

Main Methods:

  • Participants performed word recognition tasks using three types of speech degradation: noise-vocoded, time-compressed, and speech in babble noise.
  • Tasks were repeated across multiple sessions with different word sets to assess reliability.
  • Transcription accuracy was correlated across sessions and degradation types.

Main Results:

  • Individual differences in speech perception accuracy were found to be reliable across repeated sessions.
  • Performance correlations were observed across all three speech degradation methods.
  • Results indicate robust individual differences in processing degraded speech.

Conclusions:

  • Variability in degraded speech perception among normal-hearing listeners is not solely due to measurement error but reflects stable individual capabilities.
  • Underlying factors contribute to the ability to understand degraded speech irrespective of the specific degradation type.
  • Understanding these general factors may illuminate performance variations in individuals with hearing impairment.