Aerodynamic Assessment of Velopharyngeal Function during Normal Speech Containing Different Places of Articulation

Dotevall, Hans; Lohmander-Agerskov, Anette; Almquist, Sven-Åke; Bake, Björn

doi:10.1159/000021450

Cited by 7 publications

(2 citation statements)

References 25 publications

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“…Elevated expiratory pressure caused by lip and velopharyngeal closure is then released through the lips and slightly open teeth, thereby creating the /p/ sound [12, 16, 17]. The vocal tract is a closed space without interference when performing /p/, which indicates that uniform pressure is exerted on each section of the vocal tract.…”

Section: Discussionmentioning

confidence: 99%

Use of a Novel Device to Assess Intraoral and Intrapharyngeal Baropressure during Sound Production

Sakuma

Kurose

Okamoto

et al. 2016

Folia Phoniatr Logop

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Objective: We developed a novel device that simultaneously measures oral and intrapharyngeal baropressure. The transducer has the advantage that it can be placed in any region. We determined the effect of different speech samples on baropressure in these regions. Patients and Methods: Seven healthy individuals produced speech samples comprising vowels and consonants (e.g., /aka/, /apa/, and /ash/). Two transducers were installed into the experimental plate at the incisive papillae and center of the Ah-line; a third transducer was placed in the mid-pharyngeal cavity. During each task, 3 parameters were analyzed: peak pressure, mean pressure, and the temporal relationship between sound signals and pressure changes. Results: The mean pressure did not change during the production of a single vowel; however, the pressure transiently increased during the production of the speech samples, depending on the place of articulation. Moreover, the place of articulation affected the onset and peak timing of pressure changes. Conclusions: These findings indicate that pressure changes during the production of speech samples reflect the functional aspects of speech production. In particular, simultaneous pressure recordings at multiple locations would provide precise information about speech production, compared to pressure studies that used a single pressure transducer.

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Section: Discussionmentioning

confidence: 99%

Use of a Novel Device to Assess Intraoral and Intrapharyngeal Baropressure during Sound Production

Sakuma

Kurose

Okamoto

et al. 2016

Folia Phoniatr Logop

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“…The phenomenon of resonance energy being focused in the pharyngeal cavity implies that the tongue has been excessively pulled toward the posterior pharyngeal wall, which begins to contract and allows the resonance energy to be focused in the oropharyngeal cavity. This phenomenon can be explained through a different form of cul-de-sac resonance (25, 26). This form of cul-de-sac resonance is a type of pharyngeal resonance (27), oropharyngeal resonance (5), or oropharyngeal resonance (27), and can be perceived as an abnormal resonance pattern.…”

Section: Discussionmentioning

confidence: 99%

Characteristics of Nasal Resonance and Perceptual Rating in Prelingual Hearing Impaired Adults

Kim

Yoon

Kim

et al. 2012

Clin Exp Otorhinolaryngol

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ObjectivesResonance problems in hearing impaired (HI) individuals have been described as aspects of nasality. However, there are limitations in being able to explain the range of resonance problems. Therefore, this study suggests a perceptual rating that will effectively explain the characteristics of resonance problems in HI individuals.MethodsNasalance scores were obtained from 32 subjects in each of HI and normal hearing (NH) groups using a nasometer. The subjects were categorized into groups based on normal and abnormal nasalance ranges. The abnormal nasalance range group was further divided into hyper-, hypo-, and mixed-nasal groups. Nasalance scores were based the individuals performance in a series of passage and syllable tasks. The perceptual rating was evaluated using a newly introduced tool, 'vertical focus of resonance' (VFR), which focuses on the resonance energy in the frontal, throat, pharyngeal and nasal locations.ResultsThe NH group demonstrated a significantly lower nasalance score in the oral coupling and passage tasks than the HI group. Based on the results of nasalance correlation analysis, the HI group showed highly significant correlations between syllable and passage tasks, as contrasted with the NH group. There were significant differences in VFR between the nasalance types in both the NH and the HI groups.ConclusionThe HI hyper-nasal group showed tendencies of velopharyngeal opening, as opposed to the HI hypo-nasal group which showed tendencies of velopharyngeal closure. The HI mixed-nasal group showed inappropriate coordination of velopharyngeal function. In the HI group, the results of VFR showed that the air flow and the resonance energy were not released from the cavity of resonance. The suggested VFR tool explains the focusing characteristics of resonance energy within a continuation of speech sound regardless of the phonetic environment. Therefore, VFR may be a useful tool in explaining the deviant resonance patterns of HI individuals.

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An articulatory–aerodynamic approach to stop excrescence

Shosted

2011

Journal of Phonetics

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Aerodynamic Assessment of Velopharyngeal Function during Normal Speech Containing Different Places of Articulation

Cited by 7 publications

References 25 publications

Use of a Novel Device to Assess Intraoral and Intrapharyngeal Baropressure during Sound Production

Use of a Novel Device to Assess Intraoral and Intrapharyngeal Baropressure during Sound Production

Characteristics of Nasal Resonance and Perceptual Rating in Prelingual Hearing Impaired Adults

An articulatory–aerodynamic approach to stop excrescence

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