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See detailVocal Impact of a Prolonged Reading Task at Two Intensity Levels: Objective Measurements and Subjective Self-Ratings
Remacle, Angélique ULg; FINCK, Camille ULg; Roche, Anne et al

in Journal of Voice (2012), 26(4), 177-186

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 ... [more ▼]

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. [less ▲]

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See detailVoice Impact of a Prolonged Reading Task at Two Intensity Levels: Subjective Self-Ratings
Remacle, Angélique ULg; FINCK, Camille ULg; Roche, Anne et al

Poster (2011, September 01)

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, using subjective self-ratings. Methods: Fifty ... [more ▼]

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, using subjective self-ratings. Methods: Fifty normophonic women undergo two sessions of voice loading in which the required intensity level of voice varied: 60-65 dB(A) for the first session, and 70-75 dB(A) for the second session. Voice intensity level is constantly controlled with a Digital Sound Level Meter at a distance of 40cm from the mouth. Subjects’ voices are orally loaded by reading a novel of their choice for 2 hours in a quiet room (background level < 30dBA). The effects of loading are assessed with regard to self-ratings of voice obtained before and every 30 minutes during the loading tasks. The following parameters are evaluated using a 100-mm horizontal visual analogue scale: voice quality, phonation effort, vocal fatigue and laryngeal discomfort. A repeated-measure analysis of variance (ANOVA Duration X Intensity Level) where the subjects are used as their own controls is carried out to compare data obtained at different times of the reading sessions. Results and conclusion: There is a significant effect of the duration (p < 0.0001) for all the subjective self-ratings, but no differences between the two intensity levels of reading. Feeling of phonation effort, vocal fatigue and laryngeal discomfort significantly increase during prolonged reading, whereas self-rating of voice quality decrease. Subjects do not report more complaints in the 70-75 dB session than in the 60-65 dB one. To conclude, subjects’ self-ratings of voice significantly worsens throughout the reading task as a duration effect, but there is no intensity level effect. [less ▲]

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See detailVoice Impact of a Prolonged Reading Task at two Intensity Levels
Remacle, Angélique ULg; FINCK, Camille ULg; Roche, Anne et al

Poster (2011, June 02)

The purpose of this study is to evaluate the impact on voice of both duration and intensity level of 2 hours of continuous oral reading. Fifty normophonic women undergo two sessions of voice loading in ... [more ▼]

The purpose of this study is to evaluate the impact on voice of both duration and intensity level of 2 hours of continuous oral reading. Fifty normophonic women undergo two sessions of voice loading in which the required intensity level of voice varied: 60-65 dB(A) for the first session, and 70-75 dB(A) for the second session. Serial voice quality objective data is obtained every 30 minutes during the oral reading tasks, by use of Multi-Dimensional Voice program (Average fundamental frequency (AvF0), Jitter percent (Jitt), Shimmer percent (Shim), Noise-to-Harmonic Ratio (NHR)). Serial measurements of voice range are also carried out every 30 minutes of the oral reading tasks, by use of the voice range profile. Results indicate that AvF0, lowest frequency of voice range and softest output of phonation rise during prolonged oral reading. On the contrary, Jitt tends to decrease and Shim decreases significantly with the passage of time during the voice loading. NRH does not vary statistically. AvF0 and highest outpout of phonation are the only parameters influenced by the required intensity of oral reading task: they are significantly higher in the 70-75 dB session compared to the 60-65 dB session. [less ▲]

Detailed reference viewed: 39 (12 ULg)
Peer Reviewed
See detailThe Vocal Impact of a Prolonged Reading Task at two Intensity Levels
Remacle, Angélique ULg; FINCK, Camille ULg; Roche Anne et al

Conference (2011, March 29)

The purpose of this study is to evaluate the impact on voice of both duration and intensity level of 2 hours of continuous oral reading. Fifty normophonic women (mean age: 25.4 years) undergo two sessions ... [more ▼]

The purpose of this study is to evaluate the impact on voice of both duration and intensity level of 2 hours of continuous oral reading. Fifty normophonic women (mean age: 25.4 years) undergo two sessions of voice loading in which the required intensity level of voice varied: 60-65 dB(A) for the first session, and 70-75 dB(A) for the second session. The results of loading are assessed with regard to objective data and self-rating of voice obtained every 30 minutes during the oral reading tasks. Serial voice quality objective data is obtained by use of Multi-Dimensional Voice program (Average fundamental frequency (AvF0), Jitter percent (Jitt), Shimmer percent (Shim), Noise-to-Harmonic Ratio (NHR)). Serial measurements of maximum phonation time (MPT) and voice range are carried out by use of Kay Elemetrics Computerized Speech Lab. The following characteristics are also categorized by the use of a 100 mm visual analogue scale every 30 minutes of the oral reading tasks: voice quality, feeling of phonation effort, vocal fatigue, and laryngeal discomfort. Results indicate that AvF0, lowest frequency of voice range, softest output of phonation, feeling of phonation effort, vocal fatigue and laryngeal discomfort rise during prolonged oral reading. On the contrary, Shim and self-rating of voice quality decrease significantly with the passage of time during the voice loading. Jitt and NHR tend to decrease. MPT decreases after the first 30 minutes but increases afterwards. AvF0 and highest frequency of voice range are the only parameters influenced by the required intensity of oral reading task: these values are significantly higher in the 70-75 dB session compared to the 60-65 dB session. [less ▲]

Detailed reference viewed: 36 (13 ULg)