Acoustic predictors of intelligibility for segmentally interrupted speech: Temporal envelope, voicing, and duration

Research output: Contribution to journalArticlepeer-review

Abstract

Purpose: Temporal interruption limits the perception of speech to isolated temporal glimpses. An analysis was conducted to determine the acoustic parameter that best predicts speech recognition from temporal fragments that preserve different types of speech information-namely, consonants and vowels. Method: Young listeners with normal hearing previously completed word and sentence recognition tasks that required them to repeat word and sentence material that was temporally interrupted. Interruptions were designed to replace various portions of consonants or vowels with low-level noise. Acoustic analysis of preserved consonant and vowel segments was conducted to investigate the role of the preserved temporal envelope, voicing, and speech duration in predicting performance. Results: Results demonstrate that the temporal envelope, predominantly from vowels, is most important for sentence recognition and largely predicts results across consonant and vowel conditions. In contrast, for isolated words the proportion of speech preserved was the best predictor of performance regardless of whether glimpses were from consonants or vowels. Conclusion: These findings suggest consideration of the vowel temporal envelope in speech transmission and amplification technologies for improving the intelligibility of temporally interrupted sentences.

Original languageEnglish (US)
Pages (from-to)1402-1408
Number of pages7
JournalJournal of Speech, Language, and Hearing Research
Volume56
Issue number5
DOIs
StatePublished - Oct 1 2013
Externally publishedYes

Keywords

  • Acoustics
  • Hearing
  • Noise
  • Prosody
  • Speech
  • Speech perception

ASJC Scopus subject areas

  • Language and Linguistics
  • Linguistics and Language
  • Speech and Hearing

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