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Impact of speech rate and mouth opening on hypernasality and speech intelligibility in children with a cleft (lip and) palate

Cassandra Alighieri (UGent) , Kim Bettens (UGent) , Jessie Everaert (UGent) and Kristiane Van Lierde (UGent)
Author
Organization
Abstract
Aim: this study evaluated the effectiveness of different speech techniques (i.e. modification of speech rate and/or mouth opening) for the rehabilitation of hypemasality in children with a cleft palate with or without a cleft lip (CP +/- L). The impact of speech rate and/or mouth opening was investigated on both hypemasality and speech intelligibility. Methods: thirteen patients with CP L and perceived hypemasality (mean age: 10y5m) and 13 age and gender matched children without CP +/- L were included. Children were asked to read an oral and oronasal text passage in ten different speaking conditions where speech rate and/or mouth opening was manipulated. Outcome measures included instrumental measurements of hypernasality and perceptual ratings of speech intelligibility and hypemasality. Results: speaking with a lower speech rate had a statistically significant, positive influence on objective measures of hypemasality in both groups, especially when elicited by a metronome. An increased mouth opening and the combination of both techniques was only effective in the control group. Moreover, it was found that children without CP +/- L were less intelligible when speaking with a decreased mouth opening. Conclusion: a metronome-controlled decrease of speech rate had a positive influence on objective measures of hypemasality both in children with and without CP +/- L. However, present study could not provide any evidence that speaking with increased mouth opening reduces objective and perceptual measures of hypernasality in children with CP +/- L. Further research investigating the use of these techniques is necessary.
Keywords
Cleft (lip and) palate, Hypernasality, Speech intelligibility, Speech rate, Mouth opening, SEVERITY INDEX 2.0, SPEAKING RATE, FLEMISH CHILDREN, NASALITY, JUDGMENTS, AGE

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MLA
Alighieri, Cassandra, et al. “Impact of Speech Rate and Mouth Opening on Hypernasality and Speech Intelligibility in Children with a Cleft (Lip and) Palate.” JOURNAL OF COMMUNICATION DISORDERS, vol. 83, 2020.
APA
Alighieri, C., Bettens, K., Everaert, J., & Van Lierde, K. (2020). Impact of speech rate and mouth opening on hypernasality and speech intelligibility in children with a cleft (lip and) palate. JOURNAL OF COMMUNICATION DISORDERS, 83.
Chicago author-date
Alighieri, Cassandra, Kim Bettens, Jessie Everaert, and Kristiane Van Lierde. 2020. “Impact of Speech Rate and Mouth Opening on Hypernasality and Speech Intelligibility in Children with a Cleft (Lip and) Palate.” JOURNAL OF COMMUNICATION DISORDERS 83.
Chicago author-date (all authors)
Alighieri, Cassandra, Kim Bettens, Jessie Everaert, and Kristiane Van Lierde. 2020. “Impact of Speech Rate and Mouth Opening on Hypernasality and Speech Intelligibility in Children with a Cleft (Lip and) Palate.” JOURNAL OF COMMUNICATION DISORDERS 83.
Vancouver
1.
Alighieri C, Bettens K, Everaert J, Van Lierde K. Impact of speech rate and mouth opening on hypernasality and speech intelligibility in children with a cleft (lip and) palate. JOURNAL OF COMMUNICATION DISORDERS. 2020;83.
IEEE
[1]
C. Alighieri, K. Bettens, J. Everaert, and K. Van Lierde, “Impact of speech rate and mouth opening on hypernasality and speech intelligibility in children with a cleft (lip and) palate,” JOURNAL OF COMMUNICATION DISORDERS, vol. 83, 2020.
@article{8637387,
  abstract     = {{Aim: this study evaluated the effectiveness of different speech techniques (i.e. modification of speech rate and/or mouth opening) for the rehabilitation of hypemasality in children with a cleft palate with or without a cleft lip (CP +/- L). The impact of speech rate and/or mouth opening was investigated on both hypemasality and speech intelligibility. 
Methods: thirteen patients with CP L and perceived hypemasality (mean age: 10y5m) and 13 age and gender matched children without CP +/- L were included. Children were asked to read an oral and oronasal text passage in ten different speaking conditions where speech rate and/or mouth opening was manipulated. Outcome measures included instrumental measurements of hypernasality and perceptual ratings of speech intelligibility and hypemasality. 
Results: speaking with a lower speech rate had a statistically significant, positive influence on objective measures of hypemasality in both groups, especially when elicited by a metronome. An increased mouth opening and the combination of both techniques was only effective in the control group. Moreover, it was found that children without CP +/- L were less intelligible when speaking with a decreased mouth opening. 
Conclusion: a metronome-controlled decrease of speech rate had a positive influence on objective measures of hypemasality both in children with and without CP +/- L. However, present study could not provide any evidence that speaking with increased mouth opening reduces objective and perceptual measures of hypernasality in children with CP +/- L. Further research investigating the use of these techniques is necessary.}},
  articleno    = {{105950}},
  author       = {{Alighieri, Cassandra and Bettens, Kim and Everaert, Jessie and Van Lierde, Kristiane}},
  issn         = {{0021-9924}},
  journal      = {{JOURNAL OF COMMUNICATION DISORDERS}},
  keywords     = {{Cleft (lip and) palate,Hypernasality,Speech intelligibility,Speech rate,Mouth opening,SEVERITY INDEX 2.0,SPEAKING RATE,FLEMISH CHILDREN,NASALITY,JUDGMENTS,AGE}},
  language     = {{eng}},
  pages        = {{13}},
  title        = {{Impact of speech rate and mouth opening on hypernasality and speech intelligibility in children with a cleft (lip and) palate}},
  url          = {{http://dx.doi.org/10.1016/j.jcomdis.2019.105950}},
  volume       = {{83}},
  year         = {{2020}},
}

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