Effects of prolonged oral reading on F0, SPL, subglottal pressure and amplitude characteristics of glottal flow waveforms

Vilkman, Erkki; Lauri, Eija-Riitta; Alku, Paavo; Sala, Eeva; Sihvo, Marketta

doi:10.1016/s0892-1997(99)80036-8

Cited by 96 publications

(78 citation statements)

References 15 publications

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“…In the current investigation, 2 hours of duration was chosen, based on different studies 15,16,21 that demonstrated effects of vocal load using the same duration. Concerning the intensity level of the reading, previous papers 18,19,32 report two different intensity levels of reading: <65 and >65 dB at a distance of 2 m. In the present study, 60-65 dB and 70-75 dB at a distance of 40 cm from the mouth were chosen to have a clear and controlled difference between the two sessions.…”

Section: Figurementioning

confidence: 95%

“…Jitt, NHR, F-High, Range, and I-High do not statistically change during the reading task. A significant rise in F0 is reported in both laboratory 10,19,21 and field conditions [3][4][5][6][7]9 as a result of the vocal load. This may indicate an adaptation to loading, as suggested by other authors.…”

Section: Effects Of Durationmentioning

confidence: 99%

“…Effects of vocal load have been examined in several experiments, differing from one to another in terms of loading task and experimental environment. Some studies have observed the effect of vocal load using a natural speech material, [2][3][4][5][6][7][8][9] whereas others have used a loading task as prolonged loud reading [10][11][12][13][14][15][16][17][18][19][20][21][22][23][24] or repeated vowel sequence. 25 The duration and intensity level of such loading tasks have varied across studies as well as the moment and duration of recordings.…”

Section: Introductionmentioning

confidence: 99%

“…Voice samples have been analyzed either throughout the vocal load using audiotape recorders 4,7,14 and dosimeters or at different times before and after loading. 2,3,[5][6][7][10][11][12][13][15][16][17][19][20][21][22][23][24][25] Some experiments have taken place in a laboratory environment, [10][11][12][13][14][15][16][17][18][19][20][21][22][23][24] whereas others have studied subject's vocal load, during the working day. [2][3][4][5][6][7][8][9] The present study has been initiated to improve the understanding of voice duration and intensity level as loading factors.…”

Section: Introductionmentioning

confidence: 99%

“…10,12,13,21 Recent studies using high-speed digital imaging with phonovibrograms have identified vibration behavior changes in healthy voices concerning closing and opening dynamics and more leftright vocal fold asymmetries. 2,15 Acoustically, the majority of the studies have demonstrated a raise in fundamental frequency (F0) [3][4][5][6][7]9,10,19,21 and intensity 5,6,19 of voice and a decrease in instability values (jitter and shimmer). 6,21 Some authors 5,7 have considered these results as a normal adaptation to loading.…”

Section: Introductionmentioning

confidence: 99%

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Vocal Impact of a Prolonged Reading Task at Two Intensity Levels: Objective Measurements and Subjective Self-Ratings

et al. 2012

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Summary: Objectives. The objectives of this study are to evaluate the impact on voice of both duration and intensity level of 2 hours of continuous oral reading. Voice modifications accompanying changes in intensity level during prolonged reading tasks are analyzed. Methods. Fifty normophonic women undergo two sessions of voice loading in which the required intensity level of voice varied between 60-65 dB(A) for the first session and 70-75 dB(A) for the second session. The effects of loading on objective data (average fundamental frequency [F0], jitter%, shimmer%, noise-to-harmonic ratio, maximum phonation time, lowest frequency [F-Low], highest frequency [F-High], frequency range [Range], lowest intensity [I-Low] level, and highest intensity level) and self-ratings (voice quality, phonation effort, vocal fatigue, and laryngeal discomfort) are assessed every 30 minutes during the loading tasks. Results. Results indicate that average F0, F-Low, I-Low, maximum phonation time, feeling of phonation effort, vocal fatigue, and laryngeal discomfort increase during prolonged reading, whereas shimmer% and self-rating of voice quality decrease. Average F0, F-High, and Range are the only parameters influenced by the required intensity of vocal load; they are significantly higher in the 70-to 75-dB session compared with the 60-to 65-dB session. Concerning the subjective self-ratings, similar results for the four ratings used suggest that only one would suffice in future studies. Conclusions. These results confirm the importance of both duration and intensity level as loading factors, even if intensity level affects fewer variables than duration.

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Section: Figurementioning

confidence: 95%

Section: Effects Of Durationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Vocal Impact of a Prolonged Reading Task at Two Intensity Levels: Objective Measurements and Subjective Self-Ratings

et al. 2012

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Bedeutung der Stimmkonstitution f�r die Entstehung von Berufsdysphonien

Schneider

Cecon

Hanke

et al. 2004

HNO

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Occupational voice disorders have been increasing for years. The aim of this study was to examine whether a constitutionally weak voice should be regarded as a risk factor for developing such voice disorders. In a prospective study, 15 female teacher students with a normal vocal constitution were compared with 18 students with constitutionally weak voices during teaching practice. There was a significant difference in the mean fundamental frequency of both groups after teaching for 30 min. Students with constitutionally weak voices tended to have increased values. Taking into consideration the physiological aspects of an increasing fundamental frequency as a sign of vocal fatigue, a constitutionally weak voice has to be regarded as a potential risk factor for developing a voice disorder in vocally intensive occupations. To prevent future vocal problems by appropriate prophylactic intervention (i.e. voice therapy, introduction to vocal hygiene), a phoniatric examination of vocal constitution and endurance is recommended at the beginning of a voice dependent professional career.

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Multiparametric analysis of voice following prolonged voice use and voice rest in teachers: evidence from discriminant analysis

Narasimhan

Gowda

2021

Eur Arch Otorhinolaryngol

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Effects of prolonged oral reading on F0, SPL, subglottal pressure and amplitude characteristics of glottal flow waveforms

Cited by 96 publications

References 15 publications

Vocal Impact of a Prolonged Reading Task at Two Intensity Levels: Objective Measurements and Subjective Self-Ratings

Vocal Impact of a Prolonged Reading Task at Two Intensity Levels: Objective Measurements and Subjective Self-Ratings

Bedeutung der Stimmkonstitution f�r die Entstehung von Berufsdysphonien

Multiparametric analysis of voice following prolonged voice use and voice rest in teachers: evidence from discriminant analysis

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