Related Experiment Video
Updated: Oct 18, 2025
Investigation into Deep Breathing through Measurement of Ventilatory Parameters and Observation of Breathing Patterns
Published on: September 16, 2019
Immediate Effects of Performance Time of the Voiced High-frequency Oscillation With Two Types of Breathing Devices in
Daniela Hencke1, Carina Oliveira Rosa1, Angélica Emygdio da Silva Antonetti2
1Universidade Estadual do Centro-Oeste, UNICENTRO, Irati, Paraná, Brazil.
Objective:
To verify safety and compare the immediate effects of voiced high-frequency oscillation (VHFO) using two types of breathing devices on self-perception and vocal quality according to performance time in vocally healthy individuals.
Method:
Thirty individuals (15 women and 15 men) without vocal complaints or any history of dysphonia participated. Each participant performed the VHFO technique with the New Shaker and Shaker Plus devices for 3 (T3), 5 (T5), and 7 minutes (T7). All answered a questionnaire that investigated the intensity of laryngopharyngeal and vocal symptoms before and after performing the VHFO with each device and at different times. After VHFO, at each time, the voice was recorded for further analysis of vocal quality. The participants also answered a self-assessment questionnaire about vocal, laryngeal, breathing, and articulatory sensations.
Results:
T3 showed a decrease in the laryngopharyngeal symptoms "pain when swallowing," "secretion in the throat," and "phlegm" for both genders and both devices. T7 showed an increase in "dry throat" for both genders and both devices. There was an increase in the symptom "fatigue when speaking" in T3 for both genders after VHFO with the New Shaker device. We also observed a decrease in the symptoms "voice failure" and "dry cough" after VHFO with the Shaker Plus for men in T3, and "voice failure" after VHFO with the New Shaker for women in T5. We found a decrease in the acoustic parameter shimmer for women in T5 and the NHR parameter in T7 for both genders, regardless of the breathing device. There were no changes in the auditory-perceptual analysis of the voice and self-assessment of sensations after VHFO with both devices and for both genders.
Conclusion:
VHFO performed with New Shaker and Shaker Plus is safe and can be used in clinical vocal practice in vocally healthy individuals.
More Related Videos
Related Concept Videos
01:25Hyperpnea and Hyperventilation
01:26Respiratory Volumes and Capacities I
01:30Alterations in Respiration II
In Biot's breathing, the respiratory rate and depth are irregular, alternating between periods of deep gasping and apnea. Common causes...
01:29Assessment of Ventilation II: Respiratory Depth and Rhythm
Respiratory depth measures the volume of air inhaled or exhaled during a breath. It can vary from shallow to deep and typically remains consistent when a person is at rest or asleep. Occasionally, individuals will automatically inhale deeply, known as sighing, which inflates the lungs with more air than normal breathing.
To assess respiratory depth, observe the degree of chest excursion or movement:
01:24Respiratory Capacities
One key metric is the Inspiratory Capacity (IC), which represents the maximum amount of air that can be inhaled with full effort. IC is calculated by summing the tidal volume and inspiratory reserve volume, typically ranging from 2.4 to 3.6 liters.
The Functional Residual Capacity (FRC) represents the air in the...
01:23Mechanism of Breathing II: Expiration
Expiration, or exhaling, is a complex physiological process that begins as the inspiratory muscles begin to relax. This relaxation triggers a series of events that epitomize the efficiency of the respiratory system.
Mechanism of Expiration: