Vocal Fold Vibration and Voice Quality

1999 ◽  
Vol 52 (1-3) ◽  
pp. 32-38 ◽  
Author(s):  
Seiji Niimi ◽  
Mamiko Miyaji
Keyword(s):  
Vocal Fold ◽  
Voice Quality ◽  
Vocal Fold Vibration

scholarly journals Vocal Fold Vibration Characteristics during SOVTE using a Vibration Simulator and Digital Kymography

2021 ◽  
Vol 26 (4) ◽  
pp. 921-932
Author(s):  
Ji Sung Kim ◽  
Seong Hee Choi ◽  
Kyoungjae Lee ◽  
Chul-Hee Choi ◽  
Soo-Geun Wang ◽  
...  
Keyword(s):  
Clinical Practice ◽  
Vocal Fold ◽  
Clinical Evidence ◽  
Vocal Tract ◽  
Voice Quality ◽  
Vibration Characteristics ◽  
Single Source ◽  
Vocal Fold Vibration ◽  
Vibration Parameters

Objectives: The purpose of this study is to investigate the characteristics of vocal fold vibration during sustained vowel /a/ phonation and various semi-occluded vocal tract exercise (SOVTEs) using a vibration simulator and digital kymography (DKG).Methods: A total of 12 normal young speakers (6 males, 6 females) aged 20-30 years participated in the study. They phonated a sustained /a/ vowel and performed SOVTE. The vocal fold vibration characteristics were measured according to the number of vibration sources (single vs. double), and vocal tract occlusion degree using a vibration simulator and DKG. Glottal gap quotient (GQ, %), speed quotient (SQ, %) and amplitude (pixel) were estimated quantitatively from the DKG image.Results: The results showed that significantly higher GQ (p = .000) and SQ (p = .000) were observed in the humming and bilabial fricative /β/ compared to open vowels. The amplitude was significantly higher in the open vowel /a/ than in humming (p = .018) and bilabial fricative /β/ (p = .003). Also, when comparing the vocal fold vibration parameters according to vibration type (single source: straw phonation vs. double source: straw phonation with water), the double source presented a significantly higher GQ (p = .000) as well as SQ (p = .008) in comparison with a single source.Conclusion: SOVTE showed a glottal gap that is different from the opened vowel /a/. It also had a longer opening of the vocal fold and a smaller amplitude than the vowel. This suggests that SOVTE may be helpful for facilitating vocal fold vibration and good voice quality in clinical practice. The current study can be meaningful in providing theoretical and clinical evidence for SOVTE.

scholarly journals Comparing Measures of Voice Quality From Sustained Phonation and Continuous Speech

2016 ◽  
Vol 59 (5) ◽  
pp. 994-1001 ◽  
Author(s):  
Bruce R. Gerratt ◽  
Jody Kreiman ◽  
Marc Garellek
Keyword(s):  
Vocal Fold ◽  
Voice Quality ◽  
Quality Analysis ◽  
Perceptual Information ◽  
Continuous Speech ◽  
Voice Source ◽  
Acoustic Measures ◽  
Vocal Fold Vibration ◽  
Vocal Quality ◽  
Quality Deviation

Purpose The question of what type of utterance—a sustained vowel or continuous speech—is best for voice quality analysis has been extensively studied but with equivocal results. This study examines whether previously reported differences derive from the articulatory and prosodic factors occurring in continuous speech versus sustained phonation. Method Speakers with voice disorders sustained vowels and read sentences. Vowel samples were excerpted from the steadiest portion of each vowel in the sentences. In addition to sustained and excerpted vowels, a 3rd set of stimuli was created by shortening sustained vowel productions to match the duration of vowels excerpted from continuous speech. Acoustic measures were made on the stimuli, and listeners judged the severity of vocal quality deviation. Results Sustained vowels and those extracted from continuous speech contain essentially the same acoustic and perceptual information about vocal quality deviation. Conclusions Perceived and/or measured differences between continuous speech and sustained vowels derive largely from voice source variability across segmental and prosodic contexts and not from variations in vocal fold vibration in the quasisteady portion of the vowels. Approaches to voice quality assessment by using continuous speech samples average across utterances and may not adequately quantify the variability they are intended to assess.

scholarly journals Automatic Evaluation of Voice Quality Using Text-Based Laryngograph Measurements and Prosodic Analysis

2015 ◽  
Vol 2015 ◽  
pp. 1-11 ◽  
Author(s):  
Tino Haderlein ◽  
Cornelia Schwemmle ◽  
Michael Döllinger ◽  
Václav Matoušek ◽  
Martin Ptok ◽  
...  
Keyword(s):  
Vocal Fold ◽  
Voice Quality ◽  
Support Vector ◽  
Analysis Method ◽  
Prosodic Features ◽  
Connected Speech ◽  
Perceptual Evaluation ◽  
Vocal Fold Vibration ◽  
The North ◽  
Automatic Methods

Due to low intra- and interrater reliability, perceptual voice evaluation should be supported by objective, automatic methods. In this study, text-based, computer-aided prosodic analysis and measurements of connected speech were combined in order to model perceptual evaluation of the German Roughness-Breathiness-Hoarseness (RBH) scheme. 58 connected speech samples (43 women and 15 men;48.7±17.8years) containing the German version of the text “The North Wind and the Sun” were evaluated perceptually by 19 speech and voice therapy students according to the RBH scale. For the human-machine correlation, Support Vector Regression with measurements of the vocal fold cycle irregularities (CFx) and the closed phases of vocal fold vibration (CQx) of the Laryngograph and 33 features from a prosodic analysis module were used to model the listeners’ ratings. The best human-machine results for roughness were obtained from a combination of six prosodic features and CFx (r=0.71,ρ=0.57). These correlations were approximately the same as the interrater agreement among human raters (r=0.65,ρ=0.61). CQx was one of the substantial features of the hoarseness model. For hoarseness and breathiness, the human-machine agreement was substantially lower. Nevertheless, the automatic analysis method can serve as the basis for a meaningful objective support for perceptual analysis.

Vocal fold vibration and voice quality in the elderly

2016 ◽  
Vol 140 (4) ◽  
pp. 3443-3443
Author(s):  
Robin A. Samlan ◽  
Melda Kunduk ◽  
Takeshi Ikuma
Keyword(s):  
Vocal Fold ◽  
Voice Quality ◽  
The Elderly ◽  
Vocal Fold Vibration

scholarly journals Role of videolaryngostroboscopy in the diagnosis of dysphonic patient with normal fiberoptic laryngoscopy

2021 ◽  
Vol 3 (1) ◽  
pp. 26-38
Author(s):  
Sajad Al-Helo ◽  
Ahmed Al-Safi ◽  
Rahma Aljanabi
Keyword(s):  
Vocal Cord ◽  
Vocal Fold ◽  
Fiber Optic ◽  
Voice Quality ◽  
Cross Sectional Study ◽  
Cross Sectional ◽  
Laryngoscopic Examination ◽  
Vocal Fold Vibration ◽  
Detailed Assessment ◽  
Normal Fiber

Background: Dysphonia is altered voice quality, pitch, loudness, or vocal effort that impairs people’s quality of life. It is a very common complaint affecting nearly one-third of a population at some point in their life and could be caused by infection, tumor, trauma, vocal cord paralysis, etc . Indirect mirror or endoscopic laryngoscopy is used to assess the laryngeal condition in dysphonic patients seeking mainly for the cause, but frequently the findings were normal or unremarkable . Videolaryngoscopy (VLS) is very useful in dysphonic patients who have an otherwise normal indirect or flexible laryngoscopic examination. In addition to providing information regarding vocal fold vibrations, the image obtained through VLS can be magnified to make a more detailed assessment of the vocal cord anatomy than is possible with rigid of flexible laryngoscopy. Objective of study: To assess the videolaryngostroboscopic findings in dysphonic patients with normal fiber-optic laryngoscopy. Patient & Method: A cross-sectional study, Fifty patients were included in the study; They had complained of dysphonia, and the fiber-optic laryngoscopic examination was normal. Videostroboscopy were obtained for all patients to assess vocal fold vibration and seek any abnormal findings. Results: A total of 50 patients were enrolled in this study. Regarding the stroboscopic findings, 42% of the patients were normal, 15 (30%) had early soft singer’s nodules, 6 patients (12%) had intracordal lesions, 4 patients (8%)had vocal cord polypoidal changes, 2 patients (4%) had presbylaryngis, and the other 2 patients (4%) had sulcus vocalis. Conclusion: VLS is beneficial in detecting vocal cord lesions in patients with normal fiber-optic laryngoscopy. A high proportion (more than half) of dysphonic patients with normal fiber-optic laryngoscopy had abnormal findings. Keywords: Stroboscopy, Videolaryngoscopy, Fiberoptic laryngoscopy, Dysphonia.

Predicting Voice Quality of Deaf Speakers on the Basis of Glottal Characteristics

1990 ◽  
Vol 33 (1) ◽  
pp. 116-122 ◽  
Author(s):  
Nico Arends ◽  
Dirk-Jan Povel ◽  
Edward Van Os ◽  
Leo Speth
Keyword(s):  
Time Domain ◽  
Vocal Fold ◽  
Voice Quality ◽  
Regression Analyses ◽  
Point Scale ◽  
Audio Tape ◽  
Vocal Fold Vibration ◽  
Purpose Computer ◽  
Special Purpose Computer

Twenty profoundly deaf and 5 normal-hearing subjects produced 225 sustained vowels /a, i, u/ at different pitch levels and 75 phonetically balanced sentences, while vocal fold vibration was recorded through an electrolaryngograph (ELG). The utterances recorded on audio tape were judged by 10 experienced listeners on general voice quality, breathiness, hoarseness, and laryngeal strain on a 5-point scale. Seven parameters describing time-domain characteristics of the ELG-signal were extracted online by a special purpose computer system. Measurements were made over 500 consecutive vibratory cycles (10-cycle window), yielding a mean and standard deviation for each parameter per utterance. All data were submitted to analysis of variance and multiple regression analyses. Multiple correlations between glottal parameters and judged voice deviations varied between .46 and .70 indicating that overall prediction cannot reliably be based on these parameters, although severe cases of deaf voice deviations may be detectable.

scholarly journals Effect of Subglottic Stenosis on Vocal Fold Vibration and Voice Production Using Fluid–Structure–Acoustics Interaction Simulation

2021 ◽  
Vol 11 (3) ◽  
pp. 1221
Author(s):  
Dariush Bodaghi ◽  
Qian Xue ◽  
Xudong Zheng ◽  
Scott Thomson
Keyword(s):  
Flow Rate ◽  
Vocal Fold ◽  
Flow Resistance ◽  
Signal To Noise Ratio ◽  
Area Ratio ◽  
Subglottic Stenosis ◽  
Fluid Structure ◽  
Voice Production ◽  
Vocal Fold Vibration ◽  
Glottal Flow

An in-house 3D fluid–structure–acoustic interaction numerical solver was employed to investigate the effect of subglottic stenosis (SGS) on dynamics of glottal flow, vocal fold vibration and acoustics during voice production. The investigation focused on two SGS properties, including severity defined as the percentage of area reduction and location. The results show that SGS affects voice production only when its severity is beyond a threshold, which is at 75% for the glottal flow rate and acoustics, and at 90% for the vocal fold vibrations. Beyond the threshold, the flow rate, vocal fold vibration amplitude and vocal efficiency decrease rapidly with SGS severity, while the skewness quotient, vibration frequency, signal-to-noise ratio and vocal intensity decrease slightly, and the open quotient increases slightly. Changing the location of SGS shows no effect on the dynamics. Further analysis reveals that the effect of SGS on the dynamics is primarily due to its effect on the flow resistance in the entire airway, which is found to be related to the area ratio of glottis to SGS. Below the SGS severity of 75%, which corresponds to an area ratio of glottis to SGS of 0.1, changing the SGS severity only causes very small changes in the area ratio; therefore, its effect on the flow resistance and dynamics is very small. Beyond the SGS severity of 75%, increasing the SGS severity, leads to rapid increases of the area ratio, resulting in rapid changes in the flow resistance and dynamics.

Cross-Innervation of the Thyroarytenoid Muscle by a Branch from the External Division of the Superior Laryngeal Nerve

1997 ◽  
Vol 106 (7) ◽  
pp. 594-598 ◽  
Author(s):  
Sina Nasri ◽  
Joel A. Sercarz ◽  
Pouneh Beizai ◽  
Young-Mo Kim ◽  
Ming Ye ◽  
...  
Keyword(s):  
Vocal Fold ◽  
Superior Laryngeal Nerve ◽  
Laryngeal Nerve ◽  
Spasmodic Dysphonia ◽  
Clinical Implications ◽  
Motor Innervation ◽  
Vocal Fold Vibration ◽  
Adductor Spasmodic Dysphonia ◽  
Thyroarytenoid Muscle ◽  
Stimulation Of

The neuroanatomy of the larynx was explored in seven dogs to assess whether there is motor innervation to the thyroarytenoid (TA) muscle from the external division of the superior laryngeal nerve (ExSLN). In 3 animals, such innervation was identified. Electrical stimulation of microelectrodes applied to the ExSLN resulted in contraction of the TA muscle, indicating that this nerve is motor in function. This was confirmed by electromyographic recordings from the TA muscle. Videolaryngostroboscopy revealed improvement in vocal fold vibration following stimulation of the ExSLN compared to without it. Previously, the TA muscle was thought to be innervated solely by the recurrent laryngeal nerve. This additional pathway from the ExSLN to the TA muscle may have important clinical implications in the treatment of neurologic laryngeal disorders such as adductor spasmodic dysphonia.

scholarly journals VOCAL-FOLD VIBRATION AT THE ONSET OF PHONATION

1980 ◽  
Vol 83 (2) ◽  
pp. 201-212
Author(s):  
KATSUTAKE HAYASAKI
Keyword(s):  
Vocal Fold ◽  
Vocal Fold Vibration
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