Effects of the Shape of the Frontal Palate on Lingual Articulation and Mandibular Movement during Japanese /s/ Production

• Sasaki Tomofumi

  Tohoku University Hospital

• Itoh Hidemi

  Division of Stomatognathic Physiology and Prosthodontics, Graduate School of Dentistry, Tohoku University

• Nakahara Hiroko

  Miyagi National Hospital

• Imaizumi Satoshi

  Department of Communication Science and Disorders, Hiroshima Prefectural College of Health Sciences

Bibliographic Information

Other Title

• 日本語／ｓ／発音時の舌と下顎の動きに対するＳ状隆起の影響

Abstract

In order to obtain basic information for determining mandibular position, the effects of augmentation of the S-shaped frontal palate on lingual-mandibular articulation and resulting acoustic characteristics were investigated for the Japanese /s/ sound through simultaneous electro-palatographic, sirognathographic, and sound-spectrographic observations.<BR>Five adults with healthy dentition were the subjects. The test words were meaningful/asa/ (morning) and /asu/ (tomorrow), consisting of a target consonant /s/ with a preceding vowel /a/ and a succeeding vowel of wide /a/ or narrow /u/.<BR>Results showed that, through augmentation of the S-shaped frontal palate, the lingualpalatal constriction and fricative segment of /s/ are significantly prolonged, and stable duration of the mandibular vertical movement is also prolonged particularly for /asu/. The vertical distance of the mandible from the intercuspal position is significantly enlarged for both test words.<BR>These results suggests that the shape of the frontal palate significantly influences mandibular and lingual articulatory movements and resulting speech acoustics, and that /asu/, which is affected more by augmentation, is more useful than /asa/ as a test word in determining mandibular position.

Journal

• The Japan Journal of Logopedics and Phoniatrics

  The Japan Journal of Logopedics and Phoniatrics 47 (1), 34-42, 2006

  The Japan Society of Logopedics and Phoniatrics

Keywords

• /s/ sound
• shape of the frontal palate
• electro-palatogram
• maxillomandibular relationship
• simultaneous observations

Details

• CRID: 1390001204899645440
• NII Article ID: 10017174237
• NII Book ID: AN00034826
• DOI: 10.5112/jjlp.47.34
• ISSN: 18843646
• ISSN: 00302813
• Web Site: https://search.jamas.or.jp/link/ui/2006140065
• Text Lang: ja
• Data Source:
  • JaLC
  • Crossref
  • CiNii Articles
  • KAKEN
• Abstract License Flag: Disallowed