The acoustic analysis of unvoiced plosives with and without transpalatal arch

NDL Digital Collections 1 Citations 23 References

Bibliographic Information

Other Title
  • トランスパラタルアーチ装着による無声破裂音の音響分析

Search this article

Description

In orthodontic treatment, a transpalatal arch is often used for the vertical control of the maxillary molars, and expansion of the maxillary inter-molar width. Patients with the transpalatal arch usually have difficulties in speech. However few studys on the articulation with transpalatal arch have been reported. To evaluate articulation changes with transpalatal arch, we performed speech tests, time element analysis and formant frequency analysis of unvoiced plosives /ka, ki, ku, ke, ko, ta, te, to/. The subjects were 10 adults (4 males and 6 females). Transpalatal arches were placed 1.0 mm or 3.0 mm above the surface of the palate. We analyzed the syllables, the preceding vowel /a/ followed by unvoiced consonants. Speech tests were performed by two speech therapists. The sounds affected by transpalatal arches which were placed 1.0 mm above the palate were /ki/, /ku/, /ke/, /ko/, /ta/ and /te/. Transpalatal arches 3.0 mm apart from the palate affected all of the unvoiced plosives. We also analyzed the preceding vowels, consonants, transitions, and following vowels. Then, we compared normal articulation with the articulation pronounced by the subjects with transpalatal arches. In consequence, these formants showed no significant difference in preceding vowels and transitions. Therefore the cause of unclearness of pronunciation appears to be frequent incorrect articulation of the consonants and following vowels.

Journal

Citations (1)*help

See more

References(23)*help

See more

Keywords

Details 詳細情報について

Report a problem

Back to top