Immediate Effects of Two Semi-occluded Vocal Tract Exercises

NCT03413033 | Completed

• 1 other identifier: 012-210-18
• Study Type: observational
• Target: 43
• Locations: 1 country
• Sites: 1

Brief 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.

Conditions

Voice

Keywords

Semi-occluded vocal tract; resonance tubes; tongue trill; voice therapy

Outcome Measures

Primary Outcomes (1)

• Contact quotient (CQ)

  Improvement of vocal folds vibration pattern, demonstrated by a decrease of the mean CQ, measured with Electroglottography.

  1 hour

Study Arms (1)

Group 1

43 participants will produce the vowel /a:/ three times as baseline during 5 seconds in habitual, comfortable speaking pitch and loudness. Thereafter, participants will produce series of a semi-occluded vocal tract exercises (resonance tube or lip trill). Afterwards, subjects will produce the vowel /a:/ three times once again. Electroglottographic signals will be captured before and after each exercise. A 15 minutes voice rest will be taken between exercises by all subjects.

Other: Resonance tube; Other: Tongue trill

Interventions

Resonance tube OTHER

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.

Group 1

Tongue trill OTHER

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.

Group 1

Eligibility Criteria

• Age: 25 Years - 45 Years
• Sex: male
• Healthy Volunteers: Yes
• Age Groups: Adult (18-64)
• Sampling Method: Non-Probability Sample

Study Population

Healthy university teachers despite constant vocal effort, without past voice training or therapy.

You may qualify if:

• No current or past history of voice disorders.
• No current or past voice training or therapy.
• Vocal use larger than 20 hours per week.

You may not qualify if:

• Laryngeal pathology during execution of stroboscopy.
• Flu-like symptoms during measures.
• Trouble with execution of semi-occluded vocal tract exercises.
• Allergy to electrodes.

Sponsors & Collaborators

• Universidad Nacional de Colombia: lead

Study Sites (1)

Universidad Nacional de Colombia

Bogotá, 111321, Colombia

Location

Study Officials

• Luisa F Ángel Gordillo

  Universidad Nacional de Colombia

  STUDY DIRECTOR

Study Design

• Study Type: observational
• Observational Model: CASE ONLY
• Time Perspective: PROSPECTIVE
• Sponsor Type: OTHER
• Responsible Party: PRINCIPAL INVESTIGATOR
• PI Title: Msc Physiology Student

Study Record Dates

• First Submitted: January 18, 2018
• First Posted: January 29, 2018
• Study Start: August 16, 2018
• Primary Completion: January 31, 2019
• Study Completion: February 28, 2019
• Last Updated: May 13, 2021

Record last verified: 2021-05

Data Sharing

• IPD Sharing: Will not share

Locations

CO (1)