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| Author(s): |
Regina Aparecida Pimenta
Total Authors: 1
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| Document type: | Master's Dissertation |
| Press: | São Carlos. |
| Institution: | Universidade de São Paulo (USP). Escola de Engenharia de São Carlos (EESC/SBD) |
| Defense date: | 2012-01-20 |
| Examining board members: |
Arlindo Neto Montagnoli;
Maria Eugenia Dájer;
Rodrigo Capobianco Guido
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| Advisor: | Arlindo Neto Montagnoli |
| Abstract | |
The aim is to detect the immediate effect of vocal exercises in normal voices. Thirty healthy subjects from 19 to 45 year old with no vocal complains participated in the study. The sustained vowels /a/ and /E/ were recorded in two moments: the first, we recorded the habitual voice, before any exercises; and the second, after from 1 to 5 minutes of continuous voiced vibration or vocal fry exercises. Considering the two moments, recordings were submitted to perceptual examination, acoustic and high speed videolaryngoscopy evaluation. We analyzed perceptual, acoustic and spectrographic parameters of sustained vowels /a/ and /E/; as well as, videokymography parameters of high speed laryngeal images. Results: for perceptual analyses there were differences for both exercises (p = 0.016 for vibration and p = 0.046 for vocal fry of sustained vowels /a/). Jitter presented difference after voiced vibration exercises for female and male voices. Shimmer and Spectral Flatness Filter (SFF) showed difference only for female voices. After vocal fry exercises Jitter was lower only for female voices for sustained vowels /E/ (<0.01). Spectrum noise level presented difference after vocal fry exercises for sustained vowels /E/ (p = 0.02). For vibration voiced technique high-speed videolaryngoscopy showed difference for closed phase and closing phase only for female (p = 0.046 and p = 0.026, respectively). After vocal fry exercise we found difference for closing phase only for male (p = 0.026). Vibration amplitude of vocal folds increased only for women after vibration voice exercises (p < 0.01). Vibration voiced technique seems to cause positive immediate effects in voice quality, especially for women voices. (AU) | |
| FAPESP's process: | 10/03345-0 - Evaluation of vocal exercise effects in normal voices with perceptual and acoustic analysis and comparison with high-speed videolaryngoscopy images |
| Grantee: | Regina Aparecida Pimenta |
| Support Opportunities: | Scholarships in Brazil - Master |