Glottal Contact Quotient in Mediterranean Tongue Trill

Hamdan, Abdul‐Latif; Nassar, Jihad; Zaghal, Zeid Al; El-Khoury, Eleine; Bsat, Marwa; Tabri, Dollen

doi:10.1016/j.jvoice.2011.07.008

Cited by 26 publications

(18 citation statements)

References 14 publications

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“…Hence these exercises may provide a sensory feedback on phonatory conditions. In addition, the lip trill exercise has been found to decrease CQ (Gaskill & Erickson, 2008) and the same has been found for the tongue trill exercise (Hamdan et al, 2011), even though the opposite effect has also been observed (Cordeiro et al, 2012).…”

Section: Introductionsupporting

confidence: 63%

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

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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.

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Section: Introductionsupporting

confidence: 63%

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

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show abstract

“…Blowing a raspberry could also produce a similar effect on CQ, since it involves tongue and lip trills at the same time. Additionally, Hamdan et al [18] explored the impact of Mediterranean tongue trills on CQ. A decrease during exercise compared to sustained vowel phonation was found.…”

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%

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

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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.

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“…18,[20][21][22][23][24][25] These studies demonstrated that such techniques could not always decrease the CQ values. Although Gaskill and Erickson 20 and Hamdan et al 23 reported that lip and tongue trills decreased the CQ values in untrained subjects, respectively. However, Laukkanen 18 reported that voiced lip trills with firm or loose closure at the lips increase or decrease glottal closure activity in professional singers, respectively.…”

Section: No Difference In the Cq Values Between The Mtd And Control Gmentioning

confidence: 92%

“…17 Concerning the effects of humming on the condition of the vocal folds, a number of studies have investigated the immediate effects of various vocal training techniques on the degree of glottal adduction using EGG. [18][19][20][21][22][23][24][25] In particular, Verdolini et al 19 investigated the CQ values during various phonatory tasks using EGG in trained participants and proposed that resonant voice phonation adjusts the degree of glottal adduction to a barely adducted or barely abducted state. In addition, Titze 26 demonstrated in a computer simulation model that vocal training techniques using semi-occlusion in the front of the vocal tract augment supraglottal and intraglottal pressure during phonation, leading to a slight separation between the vocal folds and the prevention of vocal fold collision.…”

Section: Introductionmentioning

confidence: 99%

Immediate Effects of Humming on Computed Electroglottographic Parameters in Patients With Muscle Tension Dysphonia

et al. 2014

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Glottal Contact Quotient in Mediterranean Tongue Trill

Cited by 26 publications

References 14 publications

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

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

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

Immediate Effects of Humming on Computed Electroglottographic Parameters in Patients With Muscle Tension Dysphonia

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