Effects of Semi-Occluded Vocal Tract Exercise in Patients with Functional Aphonia

Chae, Hye Rim; Kim, Ji Sung; Lee, Dong Hoon; Choi, Seong Hee

doi:10.22469/jkslp.2019.30.1.48

J Korean Soc Laryngol Phoniatr Logop

2019

DOI: 10.22469/jkslp.2019.30.1.48

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Effects of Semi-Occluded Vocal Tract Exercise in Patients with Functional Aphonia

Hye Rim Chae¹,

Ji Sung Kim²,

Dong Hoon Lee³

et al.

Abstract: Background and Objectives：Functional aphonia is characterized by incomplete closure of the vocal folds. Semi-occluded vocal tract exercise (SOVTE) allows smoothly vocal folds collision without damage to the vocal folds tissues to produce normal vocal intensity. The purpose of this study is to report the effect of SOVTE in patients with functional aphonia. Materials and Method：Seven patients diagnosed with functional aphonia were treated with 1-3 voice therapy sessions using voiced lip-trill, humming, Lax Vox i… Show more

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Cited by 3 publications

References 12 publications

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Effects of Lax Vox Voice Therapy on Respiration and Phonation in Patients with Parkinson’s Disease

Chae¹,

Choi²,

Choi³

et al. 2019

Commun Sci Disord

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This work is based on a partial data from the first author's master thesis.Objectives: Parkinson's disease (PD) is a degenerative disease of the central nervous system that mainly affects sensory and motor function. PD patients have difficulty in controlling their vocal pitch and loudness, and poor self-monitoring due to their sensory disorder. Among semi-occluded vocal tract exercises, Lax Vox is a holistic method that provides biofeedback by focusing on the interaction of breathing, resonance, and phonation by tube phonation in water. The purpose of this study was to investigate the effect of Lax Vox voice therapy on respiration and phonation in patients with PD. Methods: Ten patients with PD (4 males and 6 females) underwent Lax Vox voice therapy six times a week for 6 weeks. To assess the effectiveness of Lax Vox voice therapy, aerodynamic, acoustic evaluation, GRBAS scale, electroglottography, and Korean Voice Handicap Index (KVHI)-10 were performed before and after voice therapy. Results: Significant improvement in aerodynamic, acoustic, auditory-perceptual rating measures, and KVHI-10 score was yielded following Lax Vox voice therapy. After treatment, significantly increased vital capacity (VC) and maximum phonation time (MPT); and reduced subglottal pressure (Psub) were observed. Cepstral peak prominence (CPP) was significantly increased and smoothed pitch perturbation quotient (sPPQ), vF0, shimmer, amplitude perturbation quotient (APQ), smoothed APQ (sAPQ), peak-amplitude variation (vAm) were significantly decreased after treatment. Moreover, Voice Range Profile (VRP) was extended and KVHI-10 scored significantly lower. Conclusion: Current outcomes confirmed that significantly positive effects were found in respiration and phonation change following Lax Vox voice therapy for patients with PD. Therefore, Lax Vox voice therapy, in addition to Lee Silverman Voice Treatment, can be useful for an effective treatment option in patients with PD.

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Effects of Lax Vox Voice Therapy on Respiration and Phonation in Patients with Parkinson’s Disease

Chae¹,

Choi²,

Choi³

et al. 2019

Commun Sci Disord

Self Cite

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show abstract

Vocal Fold Vibration Characteristics during SOVTE using a Vibration Simulator and Digital Kymography

Kim¹,

Choi²,

Lee³

et al. 2021

Commun Sci Disord

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Objectives: The purpose of this study is to investigate the characteristics of vocal fold vibration during sustained vowel /a/ phonation and various semi-occluded vocal tract exercise (SOVTEs) using a vibration simulator and digital kymography (DKG).Methods: A total of 12 normal young speakers (6 males, 6 females) aged 20-30 years participated in the study. They phonated a sustained /a/ vowel and performed SOVTE. The vocal fold vibration characteristics were measured according to the number of vibration sources (single vs. double), and vocal tract occlusion degree using a vibration simulator and DKG. Glottal gap quotient (GQ, %), speed quotient (SQ, %) and amplitude (pixel) were estimated quantitatively from the DKG image.Results: The results showed that significantly higher GQ (p = .000) and SQ (p = .000) were observed in the humming and bilabial fricative /β/ compared to open vowels. The amplitude was significantly higher in the open vowel /a/ than in humming (p = .018) and bilabial fricative /β/ (p = .003). Also, when comparing the vocal fold vibration parameters according to vibration type (single source: straw phonation vs. double source: straw phonation with water), the double source presented a significantly higher GQ (p = .000) as well as SQ (p = .008) in comparison with a single source.Conclusion: SOVTE showed a glottal gap that is different from the opened vowel /a/. It also had a longer opening of the vocal fold and a smaller amplitude than the vowel. This suggests that SOVTE may be helpful for facilitating vocal fold vibration and good voice quality in clinical practice. The current study can be meaningful in providing theoretical and clinical evidence for SOVTE.

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Effect of Voice Reinforcement Method for Treatment of Vocal Nodules: Preliminary Study

Kim¹,

Lee²

2020

J Korean Soc Laryngol Phoniatr Logop

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Background and Objective The purpose of this study is to report the effect of voice therapy using the voice reinforcement method (VRM) in patients with vocal nodules. It is one of the holistic voice therapy methods for improving vocal mechanisms. VRM includes not only direct and indirect voice therapy, but also trial therapy and self-practice. Composed of four stages: vocal hygiene education, relaxation, reinforcement, and generalization. Materials and Methods The subjects were 13 patients who were diagnosed with vocal nodules. Acoustic analysis, auditory perceptual assessment, K-VHI-10 and nodules size were compared before and after voice therapy. Voice therapy was conducted by speech-language pathologist and the mean number was 4.2. Results In acoustic analysis, Jitter, vF 0 , vAm, Shimmer, NHR, and VTI were significantly decreased. F 0 was increased after voice therapy for women. 'Grade', 'Rough,' and 'Breathy' were significantly decreased in the GRBAS scale after voice therapy. In addition, K-VHI-10 and nodules size were significantly decreased. Conclusion VRM seems to be an effective voice therapy method in vocal nodules treatment. In VRM, especially, trial therapy is given motivation for vocal nodules treatments and self-practice has a continuous therapeutic effect in everyday life. VRM can be also applied to the voice therapy for other hyper-functional dysphonia.

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Effects of Semi-Occluded Vocal Tract Exercise in Patients with Functional Aphonia

Cited by 3 publications

References 12 publications

Effects of Lax Vox Voice Therapy on Respiration and Phonation in Patients with Parkinson’s Disease

Effects of Lax Vox Voice Therapy on Respiration and Phonation in Patients with Parkinson’s Disease

Vocal Fold Vibration Characteristics during SOVTE using a Vibration Simulator and Digital Kymography

Effect of Voice Reinforcement Method for Treatment of Vocal Nodules: Preliminary Study

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