Parameters Acoustic and High-speed kymography identified effects of voiced vibration and vocal fry exercises

Abstract

Purpose: To identify the immediate effects of voiced vibration and vocal fry exercises on healthy subjects by means of acoustic parameters and high-speed kymography. Methods: Thirty healthy subjects (18 women and 12 men, aged from 19 to 45 years old) participated in this study. The voices were recorded at the range of 44.100 samples/second, before and after of the vocal exercises. We developed a computational routine to extract jitter and shimmer. High-speed kymography was generated from laryngeal images for the analysis of the phase times: closed (CPh), open (OPh), of closing (cPh) and of opening (oPh) and used the paired t-Student test and the Mann-Whitney test, with a significance level of 0.05. Results: After voiced vibrations, acoustic parameters showed reduced jitter for both genders (p=0.018 for men and p<0.01 for women) and reduced shimmer for female voices (p<0.01). There was a decrease in CPh (p=0.046) and cPh (p=0.026) and an increase in OPh (p=0.05) in female vocal folds. After vocal fry, we identified decreased jitter (p<0.01) in female voices and cPh (p=0.026) in male vocal folds. Conclusion: We observed more positive immediate effects of the voiced vibrations, mainly in voice quality and vocal folds among females. Nevertheless, studies with larger male sample and investigation of the appropriate time of vocal fry are necessary to confirm the results of this search.

Factors associated with vocal fry among college students

“…Consumption of caffeinated beverages has been identified as a risk factor for voice problems because of caffeine’s drying effect on laryngeal tissue (29). Previous studies have reported that during vocal fry, the vocal folds mucosa present more vibration amplitude due to the shortening in medial position of the vocal folds (30). Assuming the consumption of caffeinated beverages has a drying effect on laryngeal tissue, the mucosal tissue stiffness would increase, which would raise the phonation threshold pressure, thereby needing more effort (lung pressure) to initiate voicing and decreasing the ease of fry production.…”

Efeito do tempo de execução do exercício vocal sopro e som agudo na voz de mulheres

“…In the literature, there is evidence that the performance of SOVTEs produces immediate positive effects such as increase in the vocal fold contact quotient (9) , vocal economy, and improvement of the vocal quality (10) , acoustic measures, and vocal self-perception. Such results were obtained in the assessment of individuals without vocal complaints (2,3,6,(11)(12)(13) , the elderly (5,14) , dysphonic individuals (15) , teachers with behavioral dysphonia (16) , and voice professionals (17) . The high-pitched blowing vocal exercise is performed from a labial semi-occlusion, producing a continuous blow, thereupon the emission of a high-pitched sound is initiated (1) .…”

“…There are many vocal methods and techniques used in the treatment of dysphonia (1) , and several studies (2)(3)(4)(5)(6) have been conducted to verify their effect. The positive effects of tongue trill performance techniques (2) , high-pitched blowing vocal exercise (3) , exercises with resonance tubes (4,5) , Finger Kazoo (6) , among others are described in the specific scientific literature.…”

“…The positive effects of tongue trill performance techniques (2) , high-pitched blowing vocal exercise (3) , exercises with resonance tubes (4,5) , Finger Kazoo (6) , among others are described in the specific scientific literature.…”

“…Its immediate effects were analyzed in dysphonic and non-dysphonic individuals, with observation of improvement in the auditory-perceptual and acoustic parameters of the voice, laryngeal configuration, and vocal self-assessment (3) . Despite the results of the immediate effects of the SOVTE presented in the literature (2,3,5,6,(9)(10)(11)(12)(13)(14)(15)(16)(17) , there are few studies analyzing the time needed for the performance of vocal techniques and their results in the voice of dysphonic individuals and individuals without vocal complaint (12,(18)(19)(20)(21) . Some studies (12,18,19) sought to investigate the optimal performance time for the tongue trill technique in vocally healthy and dysphonic individuals.…”