Acoustic Predictors of Intelligibility for Segmentally Interrupted Speech: Temporal Envelope, Voicing, and Duration PurposeTemporal 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.MethodYoung listeners with normal hearing previously completed word and sentence recognition tasks that ... Research Note
Research Note  |   October 01, 2013
Acoustic Predictors of Intelligibility for Segmentally Interrupted Speech: Temporal Envelope, Voicing, and Duration
 
Author Affiliations & Notes
  • Daniel Fogerty
    University of South Carolina, Columbia
  • Correspondence to Daniel Fogerty: fogerty@sc.edu
  • Editor: Craig Champlin
    Editor: Craig Champlin×
  • Associate Editor: Eric Healy
    Associate Editor: Eric Healy×
Article Information
Hearing & Speech Perception / Acoustics / Speech, Voice & Prosody / Hearing
Research Note   |   October 01, 2013
Acoustic Predictors of Intelligibility for Segmentally Interrupted Speech: Temporal Envelope, Voicing, and Duration
Journal of Speech, Language, and Hearing Research, October 2013, Vol. 56, 1402-1408. doi:10.1044/1092-4388(2013/12-0203)
History: Received June 27, 2012 , Revised November 2, 2012 , Accepted January 21, 2013
 
Journal of Speech, Language, and Hearing Research, October 2013, Vol. 56, 1402-1408. doi:10.1044/1092-4388(2013/12-0203)
History: Received June 27, 2012; Revised November 2, 2012; Accepted January 21, 2013
Web of Science® Times Cited: 8

PurposeTemporal 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.

MethodYoung 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.

ResultsResults 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.

ConclusionThese findings suggest consideration of the vowel temporal envelope in speech transmission and amplification technologies for improving the intelligibility of temporally interrupted sentences.

Acknowledgment
This work was supported, in part, by the National Institute on Deafness and Other Communication Disorders Grant R03-DC012506. Thanks are extended to Larry Humes for his comments regarding this work.
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