frequency jitter shimmer andHayd ID: 427553
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OURNALOF 71 (5) P 1 S 2005http://www.rborl.org.br / e-mail: revista@aborlccf.org.br frequency, jitter, shimmer andHaydée F.Wertzner , Solange Schreiber Full Professor, Course of Speech and Hearing Therapy, USP, Coordinator of the Speech and Hearing Laboratory of Investigation i Speech and Hearing Therapist. Speech and Hearing Therapist. Master studies under course, School of Philosophy, Languages and Social Sciences, University of Addresscorrespondence to: Haydée F. Wertzner Av.: Angélica, 566, apt 61 Santa Cecília CEP: 01228-000Sao Paulo - SP, Tel (55 11) 3825 9311; e-mail: hfwertzn@usp.br; fax (55 11) 3662 5574 Fortaleza 2003.important in the process of diagnosis of this disorder, sinceintensity, jitter and shimmer. F0 - vowel /e/ was smaller,groups were found regarding the averages of jitter and shimmer. Rev Bras Otorrinolaringol.V.71, n.5, 582-88, sep./oct. 2005 ORIGINAL ARTICLE 583 OURNALOF 71 (5) P 1 S 2005http://www.rborl.org.br / e-mail: revista@aborlccf.org.br stated thatunderstand the characteristics of the phonological disorder,disorder, which allows the division into four subtypes: proposed a new classification thatcause correlated with the disorder. According to Lowe . We shouldadjustable to the particularities of the speaker. Thus, each presented a perceptual procedure(PVSP - Prosody-Voice Screening Profile) to assess theVariations of intensity, however, also depend on OURNALOF 71 (5) P 1 S 2005http://www.rborl.org.br / e-mail: revista@aborlccf.org.br that the former may lead to difficulties of sound in the latter. the acousticanalysis enables determination of number, frequency and fundamental frequency who used the perceptualprocedure PVSP - Prosody-Voice Screening Profile to compa-pitch and resonance. However, 17.8% of the children withidentification of the disorder.and their perturbations indexes - jitter and shimmer, in children MATERIAL AND METHODsponsored by FAPESP (process nº 02/03102-4). The peopleAll tests were recorded in digital audio tape (DATvideo (Sony CCD-TRV66).damental frequency (F0), jitter, shimmer and intensity - we 585 OURNALOF 71 (5) P 1 S 2005http://www.rborl.org.br / e-mail: revista@aborlccf.org.br To reach values of F0, jitter and shimmer, vowel presented similar distribution for both groups. As to shimmer,/i/ presented smaller values than the median for GTF. ResultsTable 1. Descriptive analysis - GC VariablesNMeanMedianStandard deviationMinimumMaximumQ1Q3Fo /a/ (Hz)2024324024206281225264Fo /e/ (Hz)2023724131148285218262Fo /i/ (Hz)2022924546153281171265Jitter /a/ (%)201,5511,3380,9060,9095,1581,0431,653Jitter /e/ (%)201,6781,3311,3030,8146,3261,0781,547Jitter /i/ (%)201,1131,0080,3680,6422,2390,8681,313Shimmer /a/ (dB)200,6100,5410,1870,3931,0130,4450,743Shimmer /e/ (dB)200,3750,3390,1700,1850,9180,2620,461Shimmer /i/ (dB)200,4650,4260,2430,1291,2980,3630,524Intensity - /a/ (dB)2073,873,82,269,778,972,075,3Intensity - /e/ (dB)2075,875,72,270,879,474,477,5 Intensity - /i/ (dB)2075,575,32,471,581,574,177,1GC - control groupF0 - fundamental frequencyN - total number of subjectsQ1 - first quartileQ3 - third quartileTable 2. Descriptive analysis - GTF VariablesNMeanMedianStandard deviationMinimumMaximumQ1Q3Fo /a/ (Hz)2024624623193284232262Fo /e/ (Hz)2012612612100146118136Fo /i/ (Hz)2022823742171285183265Jitter /a/ (%)201,6091,2470,8990,8103,8250,9862,063Jitter /e/ (%)201,9651,3951,9140,6738,7320,9851,722Jitter /i/ (%)201,3311,1070,8160,7064,2430,8341,370Shimmer /a/ (dB)200,6100,5760,2510,2821,3690,4200,735Shimmer /e/ (dB)200,5010,4860,2350,1951,1230,3030,653Shimmer /i/ (dB)200,5260,4860,2160,1500,8640,3370,709Intensity - /a/ (dB)2072,272,22,0269,176,270,573,8Intensity - /e/ (dB)2073,574,52,968,180,271,075,1 Intensity - /i/ (dB)2072,772,63,366,178,070,375,1GC - control groupF0 - fundamental frequencyN - total number of subjectsQ1 - first quartileQ3 - third quartile OURNALOF 71 (5) P 1 S 2005http://www.rborl.org.br / e-mail: revista@aborlccf.org.br the Analysis of Variance with two fixed factors and repetitive(p=0.191). For jitter, the test did not show differencesvariables of shimmer and jitter.Finally, for intensity, we used the Analysis of Variancewith two fixed factors and repetitive measures of one factor. , in which mean fundamental frequency values found indicated mean valueschildren aged 8 to 11 years was 236 Hz and Awan and Mueller detected in spontaneous speech 243 Hz for femaledifferential element in children with this disorder.between GC and GTF for jitter and shimmer, the valuesTable 3. Comparison between GC and GTF - fundamentalfrequency. VowelDescriptive levelA0,637E0,0001 I0,758GTF - group with phonological disorder Box plots of F0 for vowels /a/, /e/ and /i/ in GC and GTF.GTF - group with phonological disorder Box plots of jitter for vowels /a/, /e/ and /i/ in GC and GTF.the communication of children with phonological disorder. 587 OURNALOF 71 (5) P 1 S 2005http://www.rborl.org.br / e-mail: revista@aborlccf.org.br However, the results found in the present studyfold vibration, which reflect the increased values of jitter.As to shimmer, the study indicated that the characteristics GC and GTF, F0 of vowel /e/ is lower than for other vowelsin GTF, whereas in GC all vowels had similar F0 values.in GTF.We did not find statistically significant differences ACKNOWLEDGEMENT:To Fapesp for having sponsored the present study. 1.Wertzner HF. O distúrbio fonológico em crianças falantes do por-2.Andrade CRF, Lopes DMB, Wertzner HF. Uma reflexão sobre a3.Gierut JA. Treatment efficacy: functional phonological disorders4.Ingram D. Phonological Disability in Children5.Wertzner HF. Estudo da Aquisição do Sistema Fonológico: o Uso6.Edwards ML. Clinical forum: phonological assessment and treatment7.Shriberg lD, Kwiatkowiski J. Phonological disorders III: a procedurefor assessing severity of involvement. Journal of Speech and HearingDisorders1982; 47: 256-70.8.Shriberg lD & Kwiatkowski J. Developmental phonological9.Shriberg LD & Kwiatkowski J. Developmental phonological10.Shriberg LD. Epidemiologic and diagnostic profiles for five11.Lowe RJ. Fonologia Avaliação e Intervenção: Aplicações na Pato-12.Hodson BW. Clinical Forum: Phonological assessment ant13.Pena-Brooks A, Hedge MN. Assessment and Treatment of Articulation Box plots of shimmer for vowels /a/, /e/ and /i/ in GC andGTF.GTF - group with phonological disorder Box plots for intensity of vowels /a/, /e/ and /i/ in GC andGTF. OURNALOF 71 (5) P 1 S 2005http://www.rborl.org.br / e-mail: revista@aborlccf.org.br 14.Shriberg LD, Aram DM, Kwiatkowski J. 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Language AnalysisLaboratory Waisman Center on Mental Retardation and Human28.Andrade CRF, Befi-Lopes DM, Fernandes FDM, Wertzner HF.ABFW Teste de Linguagem Infantil nas Áreas de Fonologia Voca-29.Wertzner HF. Fonologia. In: Andrade CRF, Befi-Lopes DM,Fernandes FDM, Wertzner HF. ABFW: Teste de Linguagem Infan-til nas Áreas de Fonologia, Vocabulário, Fluência e Pragmática.