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NCT Number: NCT06712979

Addiction of Lung Volume Recruitment Technique in Lee Silverman Protocol for Voice Professionals

The goal of this clinical trial in voice professionals with both genders aimed to verify the changes in the vocal range profile and the changes in the glottic and vocal tract configuration for more efficient phonation after applying the adapted Lee Silverman Method and the addiction of lung volume recruitment technique in acoustic and structural analysis.

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Key information

Conditions

Voice Quality Singing

Age range

20 year–60 year

Sex eligibility

All sexes

Study type

Interventional

Phase

Not applicable

Primary location

About this study

A cross-over randomized trial with two arms-the Lee Silverman Method and the addiction of lung volume recruitment technique (LVRT)-will be conducted with voice professionals to assess the effects of both interventions on the acoustic, perceptive, and visual aspects of voice and their impact on respiratory muscle strength.

Who can participate

Healthy volunteers accepted: Yes

Only the study team can determine whether someone qualifies for participation.

Inclusion criteria

  • Voice professionals with no voice disease

Exclusion criteria

  • smokers
  • Glottis paralysis and dysfunction
  • dental problems
  • Mental and cognitive disorders

Treatment and study plan

Adapted Lee Silverman Method

Procedure

Exercise protocol with 6 steps that the voice professionals adapted from Lee Silverman Method

Lung volume recruitment technique - LVRT

Device

The adapted Lee Silverman Method will have a addiction of LVRT technique. Lung inflation begins, reaching an optimal inspiratory peak of 30 cmH2O. From this point, the sound /HA/ begins to be emitted until the most comfortable low sound, where the emission should be maintained for as long as possible, making sure that this time is not less than 12 seconds, trying to emit a high and comfortable vocal intensity. When performing the emissions, the mouth should be kept wide open with the tongue, jaw and neck relaxed, repeating 5 emissions in 3 series. Between series, the participant will be instructed to drink 50 ml of water exactly as in the previous emissions.

Primary outcomes

  1. Vocal Range Profile

    Time frame: 30 days

    Minimum fundamental frequency - f0; Maximum f0; Extension f0; Extension in Semitone; Minimum intensity; Maximum intensity and Area

Secondary outcomes

  1. functional laryngeal assessment

    Time frame: 30 days

    The Colton and Casper protocol will assess phonatory function using an endoscopic evaluation with a flexible fiberoptic endoscope.

  2. Respiratory muscle strength

    Time frame: 30 days

    Dynamic inspiratory muscle strength (S-index) will be obtained using the KH5 device of the POWERbreathe®.

Study contacts

Contact information is provided by the study sponsor or research team.

Janaina P Janaina Pimenta, Msc

CONTACT

[email protected]

+ 55 31994979352

Sponsors and collaborators

Lead sponsor

Escola Superior de Ciencias da Saude

Other

Registry information

Official study title

Comparison Between Lee- Silverman Method and Lung Volume Recruitment Tecnhique in Voice Professionals

Acronym: LVRTVOICE

Important dates

Study start
2026
Primary completion
2026
Study completion
2026
First posted
Dec 3, 2024
Registry last updated
May 28, 2026

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

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