Navegando por Palavras-chave "speech acoustics"
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- ItemSomente MetadadadosAcoustic and perceptual analyses of Brazilian male actors' and nonactors' voices: Long-term average spectrum and the Actor's Formant(Elsevier B.V., 2008-03-01) Master, Suely; De Biase, Noemi [UNIFESP]; Chiari, Brasilia Maria [UNIFESP]; Laukkanen, Anne-Maria; Universidade de São Paulo (USP); Universidade Federal de São Paulo (UNIFESP); Univ TampereThis study investigates the possible differences between actors' and nonactors' vocal projection strategies using acoustic and perceptual analyses. A total of 11 male actors and 10 male nonactors volunteered as subjects, reading an extended text sample in habitual, moderate, and loud levels. the samples were analyzed for sound pressure level (SPL), alpha ratio (difference between the average SPL of the 1-5 kHz region and the average SPL of the 50 Hz-1 kHz region), fundamental frequency (F0), and long-term average spectrum (LTAS). Through LTAS, the mean frequency of the first formant (171) range, the mean frequency of the actor's formant, the level differences between the F1 frequency region and the F0 region (L1-L0), and the level differences between the strongest peak at 0-1 kHz and that at 3-4 kHz were measured. Eight voice specialists evaluated perceptually the degree of projection, loudness, and tension in the samples. the actors had a greater alpha ratio, stronger level of the actor's formant range, and a higher degree of perceived projection and loudness in all loudness levels. SPL, however, did not differ significantly between the actors and nonactors, and no differences were found in the mean formant frequencies ranges. the alpha ratio and the relative level of the actor's formant range seemed to be related to the degree of perceived loudness. From the physiological point of view, a more favorable glottal setting' providing a higher glottal closing speed, may be characteristic of these actors' projected voices. So, the projected voices, in this group of actors, were more related to the glottic source than to the resonance of the vocal tract.
- ItemSomente MetadadadosDevelopment of the speech test signal in Brazilian Portuguese for real-ear measurement(Informa Healthcare, 2013-08-01) Garolla, Luciana P. [UNIFESP]; Scollie, Susan D.; Iorio, Maria Cecilia Martinelli [UNIFESP]; Universidade Federal de São Paulo (UNIFESP); Univ Western OntarioObjective: Recommended practice is to verify the gain and/or output of hearing aids with speech or speech-shaped signals. This study has the purpose of developing a speech test signal in Brazilian Portuguese that is electroacoustically similar to the international long-term average speech spectrum (ILTASS) for use in real ear verification systems. Design: A Brazilian Portuguese speech passage was recorded using standardized equipment and procedures for one female talker and compared to ISTS. the passage consisted of simple, declarative sentences making a total of 148 words. Study sample: the recordings of a Brazilian Portuguese passage were filtered to the ILTASS and compared to the International Speech Test Signal (ISTS). Aided recordings were made at three test levels, for three audiograms for the Brazilian Portuguese passage and the ISTS. Results: the unaided test signals were spectrally matched to within 0.5 dB. Aided evaluation revealed that the Brazilian Portuguese passage produced aided spectra that were within 1 dB on average, within about 2 dB per audiogram, and within about 3 dB per frequency for 95% of fittings. Conclusion: Results indicate that the Brazilian Portuguese passage developed in this study provides similar electroacoustic hearing-aid evaluations to those expected from the standard ISTS passage.
- ItemAcesso aberto (Open Access)Immediate effects of the phonation into a straw exercise(Assoc Brasileira Otorrinolaringologia & Cirurgia Cervicofacial, 2011-07-01) Costa, Claudia Barsanelli; Chechinato Costa, Luis Henrique; Oliveira, Gisele [UNIFESP]; Behlau, Mara [UNIFESP]; Santa Casa Med Sci Sch; Fac Med Jundiai; Universidade Federal de São Paulo (UNIFESP)Immediate effects of an exercise with the vocal tract semi-closed.Objective: To investigate the immediate effects of the phonation exercise in a straw in individuals with and without vocal fold lesions.Materials and Methods: Prospective study. 48 individuals, aged between 18 and 55 years participated in the study, and they were distributed into two groups: GL- with a benign vocal fold lesion; GSL-without a lesion. The following analyses were carried out before and after the straw phonation exercises: voice self-analysis, [El vowel auditory-perception analysis, selected parameters acoustics (VoxMetria 2.6) and vicleolaryngoscopy.Results: The vocal self assessment indicated a statistically significant improvement on voice emission in GL individuals (p=0.015). There were no statistically significant differences before and after the exercise and between the groups, in the videolaryngoscopy, acoustic and auditory-perception assessments.Conclusion: The straw phonation exercise caused positive effects, seen upon voice self-assessment, indicating an easier and better voice upon phonation.
- ItemAcesso aberto (Open Access)Phonarticulatory diadochokinesis in young and elderly individuals(Academia Brasileira de Neurologia - ABNEURO, 2009-03-01) Padovani, Marina Martins Pereira [UNIFESP]; Gielow, Ingrid [UNIFESP]; Behlau, Mara [UNIFESP]; Universidade Federal de São Paulo (UNIFESP)The phonoarticulatory diadochokinesis test has been recommended to evaluate neurological disorders. It is a speech task that consists of the ability to repeat at high speed a segment of speech. The purpose of this research is to analyze the diadochokinesia rate of adults from two distinct age groups. 23 young aice and speech analysis software Visi-Pitch III/Sona-Speech, KayElemetrics. Both groups presented with reduced diadochokinesia rate as the speech production became more complex. The young adults group presented with higher diadochokinesia rate in adults and 23 elderly people, both sexes participated in this study. Each participant produced the /pa/, /ta/, /ka/ syllables, the vowel /a/ and the /pataka/ sequence, as fast and as long as they could with habitual pitch and loudness. The speech samples were analyzed by using the voll speech tasks while the elderly adults group had a worse intensity control.
- ItemAcesso aberto (Open Access)Transfer function of Brazilian Portuguese oral vowels: a comparative acoustic analysis(Associação Brasileira de Otorrinolaringologia e Cirurgia Cervicofacial, 2009-10-01) Gonçalves, Maria Inês Rebelo [UNIFESP]; Pontes, Paulo Augusto de Lima [UNIFESP]; Vieira, Vanessa Pedrosa; Pontes, Antônio Augusto de Lima; Curcio, Daniella; De Biase, Noemi Grigoletto [UNIFESP]; Universidade Federal de São Paulo (UNIFESP); São Paulo Hospital Hearing Therapy Service; Instituto da Laringe; Santa Casa School of Medical Sciences Morphology Department; Catholic University of São Paulo Speech and Hearing Therapy School Department of FundamentalsThe vocal tract transfers its characteristics onto the sounds produced at the glottis, depending on its tridimensional configuration. AIM: this study aims to determine which of the seven oral vowels in Brazilian Portuguese is acoustically less impacted by changes to the vocal tract. MATERIALS AND METHOD: this is a cross-sectional prospective study. Twenty-three males and 23 females with ages ranging between 20 and 45 years (mean values of 28.95 and 29.79 years respectively) were enrolled in the study; none had voice complaints and their voices were normal under perceptive-auditory evaluation. Three-hundred and twenty-two sustained vocal emissions were digitized and acoustically analyzed by three computer programs combined. Results were compared against the distribution of resonance frequencies in a straight tube with one end sealed. RESULTS: statistical analysis showed that vowel /ε/ was significantly different when compared to the other vowels, with higher mean harmonic values and lower standard deviation for both genders. CONCLUSION: in Brazilian Portuguese, vowel /ε/ is less impacted by changes to the vocal tract and is significantly less attenuated in both genders. The inclusion of this vowel in voice assessment standard protocols may contribute to improve the quality of the information obtained as a result of quantitative spectrographic and acoustic tests.