The effect of reduced vowel working space on speech intelligibility in Mandarin-speaking young adults with cerebral palsy
- 31 May 2005
- journal article
- research article
- Published by Acoustical Society of America (ASA) in The Journal of the Acoustical Society of America
- Vol. 117 (6), 3879-3889
- https://doi.org/10.1121/1.1898623
Abstract
The purpose of this study was to examine the effect of reduced vowel working space on dysarthric talkers’ speech intelligibility using both acoustic and perceptual approaches. In experiment 1, the acoustic–perceptual relationship between vowel working space area and speech intelligibility was examined in Mandarin-speaking young adults with cerebral palsy. Subjects read aloud 18 bisyllabic words containing the vowels /i/, /a/, and /u/ using their normal speaking rate. Each talker’s words were identified by three normal listeners. The percentage of correct vowel and word identification were calculated as vowel intelligibility and word intelligibility, respectively. Results revealed that talkers with cerebral palsy exhibited smaller vowel working space areas compared to ten age-matched controls. The vowel working space area was significantly correlated with vowel intelligibility and with word intelligibility Experiment 2 examined whether tokens of expanded vowel working spaces were perceived as better vowel exemplars and represented with greater perceptual spaces than tokens of reduced vowel working spaces. The results of the perceptual experiment support this prediction. The distorted vowels of talkers with cerebral palsy compose a smaller acoustic space that results in shrunken intervowel perceptual distances for listeners.
Keywords
This publication has 40 references indexed in Scilit:
- What's New, Pussycat? On Talking to Babies and AnimalsScience, 2002
- The Relationship Between Perception and Acoustics for a High-Low Vowel Contrast Produced by Speakers With DysarthriaJournal of Speech, Language, and Hearing Research, 2001
- Adults’ perception of native and nonnative vowels: Implications for the perceptual magnet effectPerception & Psychophysics, 1999
- Intelligibility of normal speech I: Global and fine-grained acoustic-phonetic talker characteristicsSpeech Communication, 1996
- Acoustic characteristics of American English vowelsThe Journal of the Acoustical Society of America, 1995
- Organization in the Perception of Speech by Young InfantsPsychological Science, 1992
- Acoustic-Phonetic Contrasts and Intelligibility in the Dysarthria Associated With Mixed Cerebral PalsyJournal of Speech, Language, and Hearing Research, 1992
- Categorization of speech by infants: Support for speech-sound prototypes.Developmental Psychology, 1989
- Expanded intonation contours in mothers' speech to newborns.Developmental Psychology, 1984
- Perceptual Structure of Monophthongs and Diphthongs in EnglishLanguage and Speech, 1983