Intranasal Sound Pressure during Utterance of Speech Sounds

Hirano, Masaharu; Takéuchi, Yoshio; Hiroto, Ikuichiro

doi:10.1159/000263113

Cited by 8 publications

(2 citation statements)

References 2 publications

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“…Previous studies have suggested that nasalance scores are not zero when the VP port is closed in part because of transpalatal transfer of acoustic energy (Hirano et al 1966; Lewis et al 2000; Gildersleeve-Neumann and Dalston, 2001; Bundy and Zajac, 2006; Mandulak and Zajac, 2009). However, findings from the present study showed that this phenomenon was not substantial except for sentences containing high front vowels.…”

Section: Discussionmentioning

confidence: 99%

The Differential Influence of Vowels and Palatal Covering on Nasalance Scores

Blanton

Watterson

Lewis

2015

The Cleft Palate Craniofacial Journal

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Objective : To investigate whether nasalance scores would differ when the hard palate and soft palate were covered during speech. Design : Nasalance scores were obtained during production of sentence stimuli loaded with differing vowel content across three conditions: (1) hard and soft palate uncovered (U); (2) hard palate covered by acrylic appliance (H); (3) both hard and soft palate covered by acrylic appliance (B). Sentences were loaded with high front, low front, high back, low back, or mixed vowels. Velopharyngeal closure was verified by nasoendoscopy. Participants : Six female adults with normal speech and resonance provided the speech samples. Main Outcome Measures : Nasalance scores for each of five sentences in each of three palatal conditions. Results : Mixed and high front sentences had significantly higher mean nasalance scores in the U (P < .01) and H (P < .05) conditions but not in the B condition. For all sentence stimuli combined across palatal conditions, there was a significant difference in mean nasalance scores between H and B conditions (P < .05) but not between the U condition and either the H or B conditions (P > .05). Conclusions : Data suggest that the primary place of transpalatal transfer of acoustic energy was the soft palate but only sentences with high-front vowels were affected by this phenomenon.

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Section: Discussionmentioning

confidence: 99%

The Differential Influence of Vowels and Palatal Covering on Nasalance Scores

Blanton

Watterson

Lewis

2015

The Cleft Palate Craniofacial Journal

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“…The main limitation of acoustic recordings for the study of nasality is the difficulty of separating the nasal and the oral acoustic output, since the mouth and the nose are very close and both outputs are mixed. This issue has been addressed by inserting a probe microphone inside the nostril [7] or by physically separating the nasal and oral signals using a barrier [8,9]. Moreover, the intensity of the nasal output is not only a function of the degree of nasal coupling: it also reflects the vocal effort, which cannot be easily controlled or kept constant through utterances by speakers [10].…”

Section: Introductionmentioning

confidence: 99%