Acoustic measurements of the glottal source of normal male voices
Related Experiment Video
Updated: Jun 6, 2026
Hemi-laryngeal Setup for Studying Vocal Fold Vibration in Three Dimensions
Published on: November 25, 2017
Bárbara Costa Beber1, Carla Aparecida Cielo
1Fonoaudióloga, Universidade Federal de Santa Maria (UFSM-RS), Brazil. bcbfono@yahoo.com.br
Background:
acoustic vocal characteristics of young male adults.
Aim:
to characterize the acoustic measurements of the glottal source of young male adults with normal voices and larynx and to compare these results to the standard measurements proposed by the software used for this assessment.
Method:
25 young male individuals (20 to 40 years), who presented normal voices and larynx, were selected. All subjects had the prolonged vowel [a] emission analyzed by the Multi Dimensional Voice Program Advanced (MDVPA). The Lilliefords test, with a significance level of 5%, was used to verify the normal distribution of the results of each measurement. The parameters with normal distribution had their means compared to the standard measurements proposed by the program using the T Test (significance level of 5%).
Results:
the group was characterized by 18 means of acoustic measurements. Measurements of frequency disturbance and amplitude were the ones that most differed from the standard measurements, presenting higher values. Approximately half of the measurements presented normal distribution.
Conclusions:
the measurements of jitter and shimmer of young male adults with normal voices and larynx were high. Measurements of fundamental frequency, noise and instability remained within the expected values. Approximately half of the measurements presented normal distribution prevailing those of jitter and shimmer, indicating that these measurements can be used as a reference.
Related Concept Videos
01:28Physical Assessment of the Respiratory Tract IV: Auscultation
Breath Sounds
Breath sounds are categorized into vesicular, bronchovesicular, and bronchial.
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:
01:21Perceiving Loudness, Pitch, and Location
Place theory, or place coding, suggests that different pitches are heard because various sound waves activate specific locations along the cochlea's basilar membrane. The brain determines the pitch of a sound by identifying...
01:31Respiratory System Abnormal Finding II: Palpation and Auscultation
Palpation Findings
During a respiratory assessment, palpation can reveal several vital abnormalities:
01:25Pulmonary Function Tests
Pulmonary Function Tests are crucial diagnostic tools for assessing respiratory function, particularly in patients with chronic respiratory disorders. They comprehensively evaluate lung volumes, ventilatory function, breathing mechanics, diffusion, and gas exchange. These tests help diagnose pulmonary diseases and play a significant role in monitoring disease progression, evaluating disability, and assessing response to therapy.
PFTs involve using a spirometer, a...
01:29Physical Assessment of the Respiratory Tract III: Percussion
Percussion in Respiratory Assessment
Percussion evaluates underlying tissue composition with audible and tactile vibrations,...