Acoustic analysis of formants and measures of the sonorous signal disturbance in non-smoker and non-alcoholic women without vocal complaints
Introduction: The acoustic analysis aims at quantifying and characterizing the sonorous signal. Through this assessment it is also possible to create a normative database of populations. Objective: This study aims at extracting and analyzing the measures of sonorous signal: Fundamental Frequency, Ji...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
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Thieme Revinter Publicações Ltda.
2008-12-01
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| Series: | International Archives of Otorhinolaryngology |
| Subjects: | |
| Online Access: | http://www.arquivosdeorl.org.br/conteudo/acervo_eng.asp?Id=567 |
| Summary: | Introduction: The acoustic analysis aims at quantifying and characterizing the sonorous signal. Through this assessment it is also possible to create a normative database of populations. Objective: This study aims at extracting and analyzing the measures of sonorous signal: Fundamental Frequency, Jitter, Shimmer, APQ (Amplitude Perturbation Quotient), PPQ (Period Perturbation Quotient), NHR (Noise Harmonic Ratio) and the values of the frequencies of the first three formants of the seven oral vowels of the Brazilian Portuguese spoken in São Paulo. We also carried out the voice perceptive-auditory assessment through GIRBAS scale. Method: 107 non-smoker, non-alcoholic women, without vocal complaints and laryngological alterations. The program used for the recording and analysis of voice was the CSL 4300B and Multi-Dimensional Voice Program (MDVP). These women were divided according to age into 3 groups: 1 (18-39), 2 (40-60) and 3 (60-86) Results: There was no statistically significant difference between groups in the measures evaluated. But the values of almost all measures for disturbance of the sonorous signal (Jitter, APQ, PPQ, and NHR) were higher in Group 3. The values of Fundamental Frequency were similar in the groups studied and Shimmer was higher in group 2. For F1 Group 3 showed their highest values, in F2 there was no prevalence among groups and for F3 the values were increased for Group 3 in vowels /a/, /e/, /o/. Conclusion: The creation of normative databanks could help the researches with dysphonic and normal voices. |
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| ISSN: | 1809-9777 1809-4864 |