Individual variability of hearing-impaired consonant perception

Andrea Trevino, Jont Allen

Research output: Contribution to journalArticlepeer-review

Abstract

The study of hearing impaired speech recognition at the consonant level allows for a detailed examination of individual variability. Use of low-context stimuli, such as consonants, aids in minimizing the influence of some variable cognitive abilities (e.g., use of context, memory) across listeners and focuses on differences in the processing or interpretation of the existing acoustic consonant cues. We show that hearing-impaired perception can vary across multiple tokens of the same consonant, in both noise robustness and confusion groups. Within-consonant differences in noise robustness are related to differences in intensity of the consonant cue region. For a single listener, high errors can exist for a small subset of test stimuli, while performance for the majority of test stimuli remains at ceiling. The existence of within-consonant differences in confusion groups entails that an average over multiple tokens of the same consonant results in a larger confusion group than for a single consonant token. For each consonant token, the same confusion group is consistently observed across a population of hearing-impaired listeners. Quantifying perceptual differences provides insight into the perception of speech under noisy conditions and characterizes each listener's hearing impairment.

Original languageEnglish (US)
Pages (from-to)211-214
Number of pages4
JournalSeminars in Hearing
Volume34
Issue number2
StatePublished - 2013

Keywords

  • confusion group
  • Consonant
  • individual differences
  • speech perception

ASJC Scopus subject areas

  • Speech and Hearing

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