The Effect of an Artificially Lengthened Vocal Tract on Estimated Glottal Contact Quotient in Untrained Male Voices

Gaskill, Christopher S.; Erickson, Molly L.

doi:10.1016/j.jvoice.2008.05.004

Cited by 41 publications

(39 citation statements)

References 24 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Most studies performed on vocally healthy subjects have shown a decrease in CQ during tube phonation into the air [11,12,15,16,19,20]. Gaskill and Erickson [15] and Gaskill and Quinney [16] stated that the CQ tends to be lower with tube phonation compared to vowel production. Titze et al [11] and Bickley et al [12] reported similar findings in their EGG studies using resonance tubes.…”

Section: Discussionmentioning

confidence: 99%

“…Few of the earlier studies have considered measurements of CQ after semi-occlusion [15,16,20,28]. Gaskill and Erickson [15] and Gaskill and Quinney [16] reported no significant changes when comparing samples before and after exercise. In a single-case study, Guzman et al [20] found a decreased CQ compared to the baseline condition.…”

Section: Discussionmentioning

confidence: 99%

“…Semi-occluded vocal tract postures are voice exercises that have been investigated and used in voice clinics to affect vocal fold vibration and to change the pattern of voice production. Some studies have reported a change in CQ when semi-occlusion is compared to vowel phonation [11,12,13,14,15,16,17,18,19,20,21]. Unfortunately, most studies investigating the effects of semi-occlusion on CQ have small sample sizes and have failed to produce clear effects.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Do Different Semi-Occluded Voice Exercises Affect Vocal Fold Adduction Differently in Subjects Diagnosed with Hyperfunctional Dysphonia?

Guzmán

Mora²,

Romero³

et al. 2015

Folia Phoniatr Logop

View full text Add to dashboard Cite

Objective: To observe the possible differential effects of 8 different semi-occluded vocal tract exercises on glottal contact quotient (CQ) as a measure of vocal fold impact stress. Patients and Methods: Eighty participants were divided into two groups: an experimental group with hyperfunctional dysphonia and a control group of vocally healthy subjects. The participants were recorded before, during and after the exercises. Electroglottographic samples were analyzed to obtain CQ. Results: For the experimental group, all exercises, except lip trills and tongue trills, had an overall significant effect when conditions before, during and after the exercises were compared. The CQ presented differently across the 8 semi-occluded postures during exercise for both groups. For the experimental group, most exercises increased the CQ during practice. Only lip and tongue trills demonstrated lower CQ during exercise. Conclusions: Different semi-occluded exercises differentially affect vocal fold adduction. Lip and tongue trills produced the lowest CQ. Therefore, they may be recommended for decreasing glottal adduction. A straw submerged 10 cm below the water surface presented the greatest CQ. A shallower depth led to a lower CQ, while deeper submersion produced a higher CQ.

show abstract

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Do Different Semi-Occluded Voice Exercises Affect Vocal Fold Adduction Differently in Subjects Diagnosed with Hyperfunctional Dysphonia?

Guzmán

Mora²,

Romero³

et al. 2015

Folia Phoniatr Logop

View full text Add to dashboard Cite

show abstract

“…However, also increased phonatory effort was observed in three female subjects (Laukkanen et al, 1995). Gaskill and Erickson (2010) found significant changes, both increases and decreases, of the glottal contact quotient (CQ) in 15 vocally untrained males who had repeatedly phonated into a 50-cm glass tube. However, both inter-and intravariability were great.…”

Section: Introductionmentioning

confidence: 88%

Effects on Vocal Fold Collision and Phonation Threshold Pressure of Resonance Tube Phonation With Tube End in Water

Enflo

Sundberg

Romedahl³

et al. 2013

J Speech Lang Hear Res

View full text Add to dashboard Cite

Purpose: Resonance tube phonation in water (RTPW) or in air is a voice therapy method successfully used for treatment of several voice pathologies. Its effect on the voice has not been thoroughly studied. This investigation analyzes the effects of RTPW on collision and phonation threshold pressures (CTP and PTP), the lowest subglottal pressure needed for vocal fold collision and phonation, respectively.Method: Twelve mezzo-sopranos phonated into a glass tube, the end of which was placed under the water surface in a jar. Subglottal pressure, electroglottography and audio signals were recorded before and after exercise. Also, the perceptual effects were assessed in a listening test with an expert panel which also rated the subjects' singing experience.Results: Resonance tube phonation significantly increased CTP, and also tended to improve perceived voice quality. The latter effect was mostly greater in singers who did not practice singing daily. In addition, a more pronounced perceptual effect was found in singers rated as being less experienced.Conclusion: Resonance tube phonation significantly raised CTP and tended to improve perceptual ratings of voice quality. The effect on PTP failed to reach significance.

show abstract

“…Experimental studies have not demonstrated that SOVT has a consistent influence on the CQ yet. According to Gaskill and Ericsson [10] the effect was present with each subject, but the general trend (increasing or decreasing) could not be proven statistically. Singers have demonstrated the effect of SOVT on increasing CQ, flow, and SPL [2].…”

Section: Diameter (Mm)mentioning

confidence: 84%

The effect of resonance tubes on facial and laryngeal vibration – A case study

Frič

Hruška

2017

Biomedical Signal Processing and Control

View full text Add to dashboard Cite

The Effect of an Artificially Lengthened Vocal Tract on Estimated Glottal Contact Quotient in Untrained Male Voices

Cited by 41 publications

References 24 publications

Do Different Semi-Occluded Voice Exercises Affect Vocal Fold Adduction Differently in Subjects Diagnosed with Hyperfunctional Dysphonia?

Do Different Semi-Occluded Voice Exercises Affect Vocal Fold Adduction Differently in Subjects Diagnosed with Hyperfunctional Dysphonia?

Effects on Vocal Fold Collision and Phonation Threshold Pressure of Resonance Tube Phonation With Tube End in Water

The effect of resonance tubes on facial and laryngeal vibration – A case study

Contact Info

Product

Resources

About