Immediate Effects of Two Semi-occluded Vocal Tract Exercises

Voice Clinical Trial

Official title:

Immediate Effects of Two Semi-occluded Vocal Tract Exercises on Laryngeal Activity of Individuals With Constant Vocal Effort

Clinical Trial Details — Status: Completed

Administrative data

• NCT number: NCT03413033
• Other study ID #: 012-210-18
• Status: Completed
• Start date: August 16, 2018
• Est. completion date: February 28, 2019

Study information

• Verified date: May 2021
• Source: Universidad Nacional de Colombia
• Contact: n/a
• Is FDA regulated: No
• Study type: Observational

Clinical Trial Summary

This study aims to observe the physiological effects of two different Semi-occluded vocal tract (SOVT) exercises in the larynx when they are executed by individuals with constant vocal effort and without vocal pathology.

Description:

SOVT is a voice education or rehabilitation method that involves different postures which partially occlude or elongate the vocal tract. It causes a change in the vibration pattern of the vocal folds. SOVT postures have been postulated to produce changes in contact quotient (CQ), measured with electroglottograph (EGG). This study aims to observe the physiological effects of two different SOVT exercises in larynx when they are executed by people with constant vocal effort and without vocal pathology. In order to do so, EGG will be performed before and after 43 volunteers execute two SOVT exercises (tongue trill and resonance tubes). The following parameter will be captured: CQ. A t-paired test will be performed to compare pre and post-test information. Furthermore, a generalized estimating equation will be fit to find the effects of each exercise in the subjects.

This protocol was modified due to different administrative issues related to the use of the stroboscopy (one of the assesment tools previosly considered), so that stroboscopy was removed from the protocol.

Recruitment information / eligibility

• Status: Completed
• Enrollment: 43
• Est. completion date: February 28, 2019
• Est. primary completion date: January 31, 2019
• Accepts healthy volunteers: Accepts Healthy Volunteers
• Gender: Male
• Age group: 25 Years to 45 Years

Eligibility

Inclusion Criteria:

• No current or past history of voice disorders.

• No current or past voice training or therapy.

• Vocal use larger than 20 hours per week.

Exclusion Criteria:

• Laryngeal pathology during execution of stroboscopy.

• Flu-like symptoms during measures.

• Trouble with execution of semi-occluded vocal tract exercises.

• Allergy to electrodes.

Related Conditions & MeSH terms

• Voice

Intervention

Other:
• Resonance tube
Participants will phonate into a tube (10cm length 4mm inner diameter) during 5 minutes. They will produce series of the vowel /u/ into the tube. They will be asked to maintain the same pitch and loudness as they did in the baseline samples. They will be perceptually controlled by experimenters. When performing the exercise, the participants will be instructed to phonate with ease voice and to sense vibrations in the anterior face and the mouth.
• Tongue trill
Participants will produce series of a similar /r/ Spanish sound during 5 minutes. They will be asked to maintain the same pitch and loudness as they did in the baseline samples. They will be perceptually controlled by experimenters. When performing the exercise, the participants will be instructed to phonate with ease voice and to sense vibrations in the anterior face and the mouth.

Locations

Country	Name	City	State
Colombia	Universidad Nacional de Colombia	Bogotá

Sponsors (1)

Lead Sponsor	Collaborator
Universidad Nacional de Colombia

Country where clinical trial is conducted

Colombia, 

Outcome

Type	Measure	Description	Time frame	Safety issue
Primary	Contact quotient (CQ)	Improvement of vocal folds vibration pattern, demonstrated by a decrease of the mean CQ, measured with Electroglottography.	1 hour