Acoustic-temporal aspects of stop-plosives in the speech of Persian-speaking children with cleft lip and palate.
The main objective was to examine temporal parameters of stop-plosives in Persian-speaking children with repaired cleft lip and palate (CLP).



Eleven children with repaired bilateral CLP and 20 typically-developing children participated in the study. Stop-gap duration (SGD) and voice-onset time (VOT) were measured based on digital waveform and spectrographic displays.



Separate linear mixed model analyses showed significantly longer SGDs for children with CLP for all plosives in word-mid and final positions. Furthermore, children with CLP tend to produce longer VOTs for all voiceless plosives.



Persian-speaking children with repaired CLP prolong stop-gap segments, similar to findings reported for English-speaking children with CLP. Prolonged segments may be due to an active strategy to increase oral air pressure and/or improve perceptual accuracy of speech segments.
a Department of Allied Health Sciences, Division of Speech and Hearing Sciences, School of Medicine , University of North Carolina at Chapel Hill , NC , USA.
Marziye
M
Eshghi
b Department of Biostatistics, Gillings School of Global Public Health , University of North Carolina at Chapel Hill , NC , USA.
John S
JS
Preisser
c Department of Linguistics, School of Literature and Human Sciences , University of Tehran, Tehran , Iran , and.
Mahmood
M
Bijankhan
d Craniofacial Centre, Department of Dental Ecology, School of Dentistry , University of North Carolina at Chapel Hill , NC , USA.
David J
DJ
Zajac
D000162:Acoustics; D016022:Case-Control Studies; D002648:Child; D002663:Child Language; D002675:Child, Preschool; D002971:Cleft Lip / Q000175:diagnosis / Q000503:physiopathology / Q000601:surgery*; D002972:Cleft Palate / Q000175:diagnosis / Q000503:physiopathology / Q000601:surgery*; D005260:Female; D006801:Humans; D007492:Iran; D008297:Male; D013517:Otorhinolaryngologic Surgical Procedures; D010507:Periodicity; D013018:Sound Spectrography; D013061:Speech Acoustics; D013065:Speech Intelligibility; D013068:Speech Production Measurement; D013997:Time Factors; D016896:Treatment Outcome; D014681:Velopharyngeal Insufficiency / Q000175:diagnosis / Q000503:physiopathology / Q000601:surgery*; D014833:Voice Quality
Cleft lip and palate; stop-gap duration; velopharyngeal inadequacy; voice-onset time