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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Nasometric Measurement and the Classification of Resonance Disorders: Equipment Evaluation and a Tentative Classification System

de Boer, Gillian 18 March 2013 (has links)
Resonance disorders due to cleft palate and other aetiologies are frequently assessed in conjunction with nasometry. The most commonly used instrument is the Nasometer by KayPentax. A new model Nasometer 6450 was compared to an older model 6200 using both synthetic and speech stimuli. There was a particular focus on test-retest variability of the instrument. The Nasometers were found to yield comparable results. The inter session test-retest variability ranged from six to eight points, depending on the stimulus. The Nasometer 6450 was then used to collect nasalance scores of simulated resonance disorders. A discriminant analysis was applied to these scores. The resultant formulas were moderately successful in predicting perceived resonance when applied to pre-existing data sets.
2

Nasometric Measurement and the Classification of Resonance Disorders: Equipment Evaluation and a Tentative Classification System

de Boer, Gillian 18 March 2013 (has links)
Resonance disorders due to cleft palate and other aetiologies are frequently assessed in conjunction with nasometry. The most commonly used instrument is the Nasometer by KayPentax. A new model Nasometer 6450 was compared to an older model 6200 using both synthetic and speech stimuli. There was a particular focus on test-retest variability of the instrument. The Nasometers were found to yield comparable results. The inter session test-retest variability ranged from six to eight points, depending on the stimulus. The Nasometer 6450 was then used to collect nasalance scores of simulated resonance disorders. A discriminant analysis was applied to these scores. The resultant formulas were moderately successful in predicting perceived resonance when applied to pre-existing data sets.
3

Nasaleringsvärde för Nasometer hos svensktalande 13- och 18-åringar

Birgersson, Magdalena, Norberg, Christel January 2013 (has links)
Bakgrund Nasometer är ett datorbaserat instrument som procentuellt mäter andel ljudenergi som vid tal kommer ut via näsan. Nasometern är det främst använda instrumentet vid instrumentell nasalitetsbedömning. I användningen av Nasometer behövs normalvärden från personer med typisk resonansutveckling. Normalvärden för svenska språket finns för flera åldersgrupper, men inte för tonåringar. Syfte Ta fram normalvärden för Nasometer hos svensktalande 13- respektive 18-åringar, studera värdenas spridning samt analysera könsskillnader inom respektive åldersgrupp. Metod  Deltagarna bestod av två grupper; 39 deltagare i åldern 12 - 13 år och 48 deltagare i åldern 18-19 år. Alla deltagarna hade svenska som modersmål samt typisk tal- och språkutveckling. Talmaterialet bestod av ord och meningar med endast orala fonem samt nasala meningar innehållande hög andel nasala fonem. Normalvärden för Nasometer samlades sedan in genom inspelning.   Resultat  Medelvärdena gällande 13-åringar var för orala ord 13,6 % (SD 8,7), orala meningar 11,4 % (SD 6,2) och nasala meningar 60,2 % (SD 12,0). 18-åringars medelvärden var för orala meningar 14,0 % (SD 5,5) och nasala meningar 57,5 % (SD 6,2). Det fanns signifikanta könsskillnader endast för 18-åringar, dock uppvisade flickor/kvinnor deskriptivt något högre medelvärde inom båda grupperna. Slutsatser  Medelvärdena visade stor spridning inom grupperna, speciellt för 13-åringar. Medelvärdena i båda åldersgrupperna i föreliggande studie ligger dock inom spannet för typisk nasalitet, vilket visar att normalvariationen av medelvärde är stor. / Background  The Nasometer is a data-based instrument that measures the amount of acoustic energy from the nose during speech and is the most common instrument for nasalance assessments. To use the Nasometer clinically, normative scores are needed from people with typical resonance development. There are normative scores in Swedish for several age groups, except for teenagers. Aim Collect normative nasalance scores with the Nasometer among two Swedish age groups, study the scores spread and analyze gender differences within the groups. Method  Two groups of participants; 39 participants 12-13 years and 48 participants 18-19 years. All participants used Swedish as their native language and had typical speech- and language development. The speech material consisted of oral word and sentences containing only oral phonemes and nasal sentences containing a high amount of nasal phonemes. Normative scores for the Nasometer were then collected by recording. Results  Means for the younger group were for oral words 13,6 % (SD 8,7), oral sentences 11,4 % (SD 6,2)  and nasal sentences 60,2 % (SD 12,0). Means for the older group were for oral sentences 14,0 % (SD 5,5) and nasal sentences 57,5 % (SD 6,2). Only in the older group there was a significant gender difference but females showed higher descriptive scores in both groups. Conclusions  Means showed great spread within both groups. The means are though within the range for typical nasality. This implicates great variation of means among normal speakers.
4

Effect of temporary prosthetic mandibular advancement on velopharyngeal closure for speech

Shin, Kyungsup 01 July 2015 (has links)
Introduction: Velopharyngeal inadequacy (VPI) may result in inappropriate oral/nasal coupling during the production of speech sounds, resulting in unwanted nasal resonance and/or nasal air emission. Orthognathic surgeries such as maxillary and/or mandibular advancements are also known to change skeletal and muscular structures resulting in changes affecting velopharyngeal closure (VPC). Although many studies have reported on the effect of maxillary advancement surgery on VPI for patients with cleft lip and palate, the effect of mandibular advancement on VPI has not been studied at length. The purpose of this study was to elucidate the effect of temporary prosthetic mandibular advancement on velopharyngeal function. Methods: Fourteen subjects (7 males, 7 females) with no history of craniofacial abnormalities or speech disorders were recruited. The mean age was 35 years (range = 26-60). Acoustic nasalance measurements were obtained during nasal sentences and during sentences without nasal consonants in two conditions; normally, and while wearing an elastic mandibular advancement (EMA) appliance to advance the mandible by 13mm. In addition, subjects were asked to produce five repetitions of the sentence "Ten men came in when Jane left" while recordings were obtained with a videoendoscopy/phototransducer system that sensed the amount of light passing through the velopharyngeal orifice. The endoscope and fiber optic light were inserted through the subject's middle nasal meatus and positioned above the velum. The phototransducer fiber was extended through the velopharyngeal port into the upper oropharynx to detect light passing through the orifice as the velopharyngeal mechanism opened and closed. Individual subject's outcomes with and without the EMA appliance were analyzed statistically using paired t-test for Nasalance test, and one-way ANOVA/independent samples t-test for phototransducer test. Results: Nasalance did not deteriorate, but significantly decreased for the ‘nasal’ sentences after mandibular advancement, whereas changes in nasalance were not significant for the sentences containing no nasal consonants after mandibular advancement. Mandibular advancement by a 13 mm using an EMA appliance did not significantly affect VPC. Instead, large variability among subjects in response to mandibular advancement. For 7 of the 14 subjects, the extent of VPC decreased significantly (p < .05) under the advanced mandible condition compared to the normal condition (without the EMA appliance). On the other hand, 5 subjects showed significantly (p < .05) increased VPC when their mandibles were advanced. For 2 subjects, VPC was not significantly changed with the advanced mandible. Conclusions: The outcomes of this study suggested that there was no statistical evidence to support that nasality was deteriorated by a 13mm mandibular advancement, which agreed with recent studies describing velopharyngeal function and nasality after orthognathic surgeries. VPC was not affected by mandibular advancement. Responses of the nasalance and VPC to mandibular advancement were dependent on the individuals. Further investigation such as electromyography method is needed to understand how velopharyngeal function and speech respond to mandibular advancement more definitely.
5

Effects of Nasalance on the Acoustics of the Tenor Passaggio and Head Voice

Perna, Nicholas K. 21 April 2008 (has links)
PERNA, NICHOLAS (D.M.A., Vocal Pedagogy and Performance) Effects of Nasalance on the Acoustical Properties of the (May 2008) Tenor Passaggio and Head Voice Abstract of a doctoral essay at the University of Miami. Doctoral essay supervised by Professor David Alt and Professor Rachel L. Lebon. No. of pages in text. (73) This study aims to measure the effect that nasality has on the acoustical properties of the tenor passaggio and head voice. Not to be confused with forward resonance, nasality here will be defined as nasalance, the reading of a Nasometer, or the percentage of nasal and oral airflow during phonation. A previous study by Peer Birch et. al. has shown that professional tenors used higher percentages of nasalance through their passaggio. They hypothesized that tenors used nasalance to make slight timbral adjustments as they ascended through passaggio. Other well respected authors including Richard Miller and William McIver have claimed that teaching registration issues is the most important component of training young tenors. It seemed logical to measure the acoustic effects of nasalance on the tenor passaggio and head voice. Eight professional operatic tenors participated as subjects performing numerous vocal exercises that demonstrated various registration events. These examples were recorded and analyzed using a Nasometer and Voce Vista Pro Software. Tenors did generally show an increase of nasalance during an ascending B-flat major scale on the vowels [i] and [u]. Perhaps the most revealing result was that six of seven tenors showed at least a 5-10% increase in nasalance on the note after their primary register transition on the vowel of [a]. It is suggested that this phenomenon receive further empirical scrutiny, because, if true, pedagogues could use nasalance as a tool for helping a young tenor ascend through his passaggio.
6

Nasalidade e nasalância após palatoplastia primária / Speech nasality and nasalance after primary palatoplasty

Ferreira, Daniele Baraldi de Paula 29 April 2011 (has links)
Objetivo: Verificar os resultados de nasalidade da fala após a palatoplastia primária, por meio de avaliação perceptiva combinada à avaliação nasométrica. Modelo: Estudo clínico prospectivo. Local de Execução: Laboratório de Fisiologia do Hospital de Reabilitação de Anomalias Craniofaciais da Universidade de São Paulo (HRAC-USP). Método: Análise da nasalidade da fala realizada em 73 indivíduos com fissura de palato±lábio, com 10 anos de idade, em média, submetidos à palatoplastia primária em um único tempo cirúrgico pela técnica de von Langenbeck. Para a avaliação perceptiva, a nasalidade foi classificada por 3 juízes utilizando-se uma escala de 4 pontos (1=hipernasalidade ausente, 2=leve, 3=moderada e 4=grave), a partir de amostras de fala registradas em um sistema de áudio e vídeo. O grau de concordância inter e intrajuízes foi verificado por meio do coeficiente de Kappa. Um escore final para a nasalidade (média dos juízes) foi estabelecido para cada indivíduo. Na avaliação instrumental da nasalidade, determinou-se a nasalância da fala por meio de um nasômetro 6200-3 IBM, Kay Elemetrics, utilizando-se o valor de corte de 27%. A comparação entre os resultados dos dois métodos, no que se refere à proporção de casos com ausência e presença de hipernasalidade foi verificada por meio do teste de McNemar (p<0,05). Resultados: Na avaliação perceptiva, ausência de hipernasalidade foi verificada em 70% (51) dos casos, 26% (19) apresentaram hipernasalidade leve, 3% (2) moderada e 1% (1), grave. Concordância interjuízes discreta a substancial foi verificada na classificação da nasalidade. Na análise da concordância intrajuízes, o grau variou de quase perfeito a perfeito. À avaliação nasométrica, 78% (57) dos sujeitos apresentaram valores de nasalância sugestivos de ausência de hipernasalidade, enquanto que os demais 22% (16) apresentaram valores de nasalância aumentados (>27%). Não houve diferença estatisticamente significante entre as proporções de sujeitos com presença e ausência da hipernasalidade obtidas pelos dois métodos. Conclusão: Os resultados obtidos por meio da avaliação perceptiva combinada à nasométrica permitiram concluir que a palatoplastia primária foi efetiva em eliminar a hipernasalidade em parcela significante dos indivíduos analisados. / Objective: To verify speech nasality after primary palatoplasty by means of perceptual and nasometric assessment. Design: Prospective clinical study. Setting: Laboratory of Physiology, Hospital de Reabilitação de Anomalias Craniofaciais da Universidade de São Paulo (HRAC-USP). Method: Analysis of speech nasality in 73 cleft palate±lip subjects, with 10 years of age, on average, who underwent one-stage primary palatoplasty by von Langenbeck technique. For perceptual assessment, nasality was classified by 3 judges using a 4-point scale (1=hypernasality absent, 2=mild, 3=moderate and 4=severe), based on speech samples recorded in audio and video system. Inter and intra-judge agreement was verified using Kappa coefficient. A final nasality score (mean of the judges) was established for each subject. In the instrumental assessment of nasality, nasalance scores were provided by a nasometer, model 6200-3 IBM, Kay Elemetrics, using the cutoff score of 27%. Comparison between the results of both methods, with regard to proportion of cases with absence and presence of hypernasality was verified by the McNemar test (p<0.05). Results: Perceptually, absence of hypernasality was verified in 70% (51) of cases, 26% (19) presented mild hypernasality, 3% (2) moderate and 1% (1), severe. Kappa coefficient showed fair to substantial inter-judge agreement. Intra-judge agreement ranged from almost perfect to perfect. Nasometric assessment found 78% (57) of cases with normal nasalance scores, indicating absence of hypernasality, whereas the remaining 22% (16) presented increased scores (>27%). There was no statistically significant difference between the proportion of subjects with presence and absence of hypernasality provided by both methods. Conclusion: The results obtained by perceptual and nasometric assessment indicated that primary palatoplasty was effective in eliminating hypernasality in a significant number of the subjects analyzed.
7

Relação entre nasalância e articulação compensatória / Relationship between nasalance and compensatory articulation

Garcia, Ariany Fernanda 12 April 2013 (has links)
Introdução: Estudos foram realizados com o objetivo de investigar variáveis que podem alterar o valor de nasalância. Levanta-se a hipótese de que a presença de articulação compensatória (AC), particularmente a fricativa faríngea e o golpe de glote, terá um impacto nos achados nasométricos. Objetivos: Obter amostras de fala representativas das produções com presença e ausência de hipernasalidade, golpe de glote e fricativa faríngea; classificar amostras de fala por meio de julgamento perceptivo-auditivo por juízes múltiplos; comparar os valores de nasalância entre amostras de fala com presença e ausência de AC. Material e método: Neste estudo foram coletadas amostras de fala de 43 indivíduos, com história de fissura de palato, com ou sem disfunção velofaríngea. Cada indivíduo foi solicitado a repetir 24 frases (estímulos de fala) gerando 1032 gravações áudio e seus respectivos valores de nasalância. Foram excluídas 172 amostras por não apresentarem boa qualidade, restando 860 amostras de fala submetidas ao julgamento perceptivo-auditivo de 3 juízes. Permaneceram no estudo 553 amostras de fala que julgadas com 100% de concordância entre os juízes quanto à nasalidade e uso de AC. Foram formados quatro grupos de dados: G1 amostras sem hipernasalidade e sem AC (N=191); G2 amostras com hipernasalidade e sem AC (N=288); G3 amostras com hipernasalidade e com fricativa faríngea (N=33); G4 amostras com hipernasalidade e golpe de glote (N=41). Resultados: O teste estatístico ANOVA revelou diferença significante entre as médias de nasalância entre os 4 grupos (p<0,0001). Os resultados evidenciaram valores de nasalância significativamente mais elevados para os 3 grupos com hipernasalidade de fala (G2, G3, G4) em relação ao grupo sem hipernasalidade (G1). Este estudo também evidenciou que o uso da fricativa faríngea (G3) em amostras com hipernasalidade resultou em escores de nasalância significativamente mais altos do que observado nas amostras somente com hipernasalidade (G2), particularmente para os sons fricativos /f/ e /s/. Conclusão: A presença da AC, particularmente da fricativa faríngea, na presença da hipernasalidade teve um impacto nos valores de nasalância para os estímulos com os sons /f/ e /s/, os quais se mostraram aumentados em relação ao grupo com hipernasalidade e sem AC (G2). Futuros estudos podem auxiliar com dados normativos em nasometria para amostras de fala com AC sendo necessário um maior número de amostras de fala representativas do uso produções articulatórios com pontos atípicos. / Introduction: Studies have been conducted to investigate variables that can affect nasalance scores. The hypothesis that the presence of compensatory articulation (CA), particularly pharyngeal fricative and glottal stops, can have an impact in nasalance values has been made in this study. Objectives: To obtain speech samples representative of productions with and without hypernasality, glottal stops and pharyngeal fricatives; To classify the samples according to auditory-perceptual ratings by multiple judges; To compare nasalance values between samples with and without CA. Material and methods: The samples for this study were obtained from 43 individuals with history of cleft palate with and without velopharyngeal dysfunction. Each individual was required to repeat 24 phrases (speech stimuli) originating 1032 audio recordings and their respective nasometric values. A total of 172 samples were excluded due to inadequate quality, and the remaining 860 samples were submitted to auditory-perceptual ratings by 3 listeners. The 553 samples rated with 100% agreement among the judges regarding nasality and CA were maintained in the study. Four groups were identified: G1 included samples without hypernasality and without CA (N=191); G2 included samples witht hypernasality and without CA (288); G3 included samples with hypernasality and with pharyngeal fricative (N=33); G4 included samples with hypernasality and with glottal stop (N=41). Results: The statistical test ANOVA revealed significant difference between nasalance values for all 4 groups (p<0,0001). Results showed nasalance scores significantly higher for the 3 groups with hypernasality (G2, G3, and G4) in relation to the group without hypernasality and without CA (G1). The study revealed that the use of pharyngeal fricative (G3) in samples with hypernasality resulted in nasalance score significantly higher than the those identified for the samples with hypernasality but without CA (G2), and the significance was found for productions involving /f/ and /s/. Conclusion: the presence of CA, particularly pharyngeal fricative (G3), had an impact in nasalance values for the stimuli with /f/ and /s/, with scores significantly higher for the samples with pharyngeal fricative and with hypernasality when compared to the samples only with hypernasality (G2). Future studies can contribute with normative data for speech samples with CA requiring a larger samples representative of use of atypical place of production.
8

Nasalância na presença e ausência da fricativa faríngea / Nasalance at presence and absence of pharyngeal fricative

Guerra, Thaís Alves 28 July 2014 (has links)
Objetivos: Estabelecer um banco de amostras de fala constituído por gravações representativas do uso de articulação compensatória do tipo (FF), da presença de hipernasalidade e da ausência de hipernasalidade; identificar valores de nasalância (média e desvio padrão) em amostras de fala estudadas; e comparar os valores de nasalância nas diferentes amostras de fala. Método: Um total de 1680 amostras de fala foram fornecidas por 19 indivíduos com fissura labiopalatina (FLP) operada, com ou sem disfunção velofaringea (DVF) e por cinco indivíduos sem DVF e sem histórico de FLP. Os participantes repetiram um conjunto de 14 frases (13 constituídas de sons de alta pressão e uma constituída de um som de baixa pressão), enquanto os sinais de áudio e nasalância foram capturados simultaneamente. Os sinais de áudio foram editados e foram julgados por três juízas experientes por consenso. Após julgamento as amostras foram reagrupadas em quatro grupos distintos: G1 incluiu 255 amostras de fala julgadas como representativas de hipernasalidade (hiper); G2 incluiu 130 amostras de fala julgadas como representativas do uso de FF e hipernasalidade; G3 incluiu 280 amostras de fala julgadas como representativas de fala típica (sem FF e sem hiper) em falantes com histórico de FLP; G4 incluiu 175 amostras de fala julgadas como representativas de fala típicas (sem FF e sem hiper) em falantes sem histórico de FLP. Resultados: Os julgamentos aferidos por consenso pelas três juízas permitiram a identificação de amostras representativas do uso de FF e da presença e ausência de hipernasalidade. As amostras julgadas e redistribuídas nos quatro grupos de interesse permitiram o cálculo dos valores de nasalância para cada grupo e foi realizado estatística inferencial utilizando o teste Kruskal-Wallis para testar a hipótese de que a presença de FF, associada ou não à hipernasalidade, nas amostras de fala de interesse, altera os resultados de nasalância. Quando houve diferença estatisticamente significante foi aplicado o teste Dunn\'s para comparar os grupos aos pares. Após a análise estatística inferencial realizada observa-se que houve diferença estatisticamente significativa entre os grupos com alteração de fala (G1 e G2) e aqueles sem alteração (G3 e G4). A diferença entre o grupo com hipernasalidade (G1) e o grupo com FF (G2) não foi significante Conclusão: O uso de FF não influenciou significativamente os valores de nasalância para a amostra estudada, refutando a hipótese estipulada. / Objective: This study had the objectives of establishing a data bank of speech recordings representative of use of pharyngeal fricative compensatory articulation (PF); presence and absence of hypernasality; identifying nasalance values (mean and standard deviation for the samples studied; and comparing nasalance finding among the different speech samples established. Method: A total of 1680 speech samples were recorded from 19 individuals with cleft lip and palate (CLP), 11 with velopharyngeal dysfunction (VPD) and 8 without VPD, and from 5 individuals without history of CLP. The participants repeated a series of 14 phrases (13 with high pressure consonants and 1 with a low pressure consonant), while audio and nasometric data was simultaneously recorded. The audio signals captures were edited and rated by 3 experienced judges with 100% agreement. After the ratings the samples were distributed into 4 groups (G): G1 included 255 samples rated as representative of presence of hypernasality; G2 included 130 samples rated as representative of use of PF and hypernasality; G3 included 280 samples rated as representative of normal speech (without PF and without hypernasality) for speakers with history of cleft palate; G4 included 175 samples rated as representative of normal speech (without PF and without hypernasality) for speakers without history of cleft palate. Results: The ratings established with agreement by the 3 judges during auditory-perceptual analysis of the recordings responded to objectives this study which proposed to establish samples representative of use of PF and of presence and absence of hypernasality. The samples rated by the judges were distributed into the four groups of interest for calculation of the nasalance scores, The Kruskal-Wallis statistical test was used to test the hypothesis that presence of PF, with or without hypernasality significantly would affect nasalance scores. When significant difference was found Dunns test was used to compared data in group pairs. After inferential statistics we observed that a significant difference was found between nasalance scores for groups G1 and G2 (samples representative of speech errors) with groups G3 and G4 (samples representative of normal speech). The difference between the group with hypernasality (G1) and the group with PF (G2) was not significant. Conclusion: The use of PF did not significantly influence nasalance values for the studied sample, refuting the proposed hypothesis.
9

Evaluation of nasal speech : a study of assessments by speech-language pathologists, untrained listeners and nasometry

Brunnegård, Karin January 2008 (has links)
Excessive nasal resonance in speech (hypernasality) is a disorder which may have negative communicative and social consequences for the speaker. Excessive nasal resonance is often associated with cleft lip and palate, velopharyngeal impairment, dysarthria or hearing impairment. Evaluation of hypernasality has proved to be a challenge in the clinic and in research. There are questions regarding the accuracy and reliability of auditory perceptual evaluations of nasal speech, and whether instrumental measures can be used to improve the reliability of clinical evaluation. There is also the question of whether clinical evaluation reflects the impact of hypernasality in a speaker’s everyday life. The purpose of this thesis was to evaluate the extent of reliability problems connected with auditory perceptual assessment of nasality in speech, to explore whether they might interfere with treatment decisions or have an impact in the everyday life of patients, and whether they can be effectively diminished by the use of nasometry. Speakers with cleft lip and palate or velopharyngeal impairment formed the basis of the clinical population used in this study. Speech samples from 52 of these speakers, along with samples from a reference population of 21 speakers who did not have cleft palate, velopharyngeal impairment or speech disorders were used in perceptual evaluation tasks. Fourteen speakers from the clinical population and 11 from the reference population also underwent nasometric evaluation. A further reference population of 220 children from three Swedish cities, whose ages were consistent with those used for clinical checks of children born with cleft palate were assessed with nasometry to establish normative data for the Nasometer™. Perceptual speech assessments were conducted on hyper- and hyponasality, as well as audible nasal air emission and/or nasal turbulence, using 5-point ordinal scales. Listeners were SLPs experienced in the evaluation of cleft palate speech, non-expert SLPs and untrained listeners. Listening assessments were performed from audio recorded speech samples assembled in random order. Nasometry measures were made on three speech passages each with specific phonetic content, using the Nasometer™, model II. Perceptual evaluation Results showed that for hypernasality assessment, 15% of hypernasality assessments had disagreements between expert SLPs that were potentially important for clinical decisions, as did 6% of assessments for audible nasal air emission and/or nasal turbulence. For nasality problems, a comparison of expert and untrained listeners showed that they generally agreed on which speakers were hypernasal and on the ranking of nasal speakers. All speakers that had been rated with moderate to severe hypernasality by expert listeners were considered by the untrained listeners as having a serious enough speech disorder to call for intervention. However, in the case of audible nasal air emission and/or nasal turbulence the expert listeners were more prone to notice this feature than the untrained listeners. Instrumental evaluation The development of normative values for the three Swedish passages for the NasometerTM (comparable to normative values in other languages) has provided a basis for use of instrumental measures in Swedish clinics, oral sentences mixed sentences nasal sentences. The measures showed no significant differences due to city, gender or age within an age range of 4-10 years. When nasometry measures were compared with perceptual evaluation of speech samples from the same speakers, all correlations were moderate to good for expert SLPs and non-expert SLPs. The difference between correlations was significantly higher for expert SLPs than for untrained listeners. Reliability figures for perceptual assessments for expert SLP listeners indicated that there were some cases where lack of reliability could affect clinical decision making. However, in the main, judgements of nasality problems made by clinicians had everyday validity. They reflected the impressions of the everyday listener, especially in regard to the need for intervention. The study also indicates that now that Swedish norms are available, the Nasometer™ might be useful as a complement to auditory perceptual clinical speech assessments in Swedish cleft palate clinics in order to improve reliability of clinical assessment.
10

Relação entre nasalância e articulação compensatória / Relationship between nasalance and compensatory articulation

Ariany Fernanda Garcia 12 April 2013 (has links)
Introdução: Estudos foram realizados com o objetivo de investigar variáveis que podem alterar o valor de nasalância. Levanta-se a hipótese de que a presença de articulação compensatória (AC), particularmente a fricativa faríngea e o golpe de glote, terá um impacto nos achados nasométricos. Objetivos: Obter amostras de fala representativas das produções com presença e ausência de hipernasalidade, golpe de glote e fricativa faríngea; classificar amostras de fala por meio de julgamento perceptivo-auditivo por juízes múltiplos; comparar os valores de nasalância entre amostras de fala com presença e ausência de AC. Material e método: Neste estudo foram coletadas amostras de fala de 43 indivíduos, com história de fissura de palato, com ou sem disfunção velofaríngea. Cada indivíduo foi solicitado a repetir 24 frases (estímulos de fala) gerando 1032 gravações áudio e seus respectivos valores de nasalância. Foram excluídas 172 amostras por não apresentarem boa qualidade, restando 860 amostras de fala submetidas ao julgamento perceptivo-auditivo de 3 juízes. Permaneceram no estudo 553 amostras de fala que julgadas com 100% de concordância entre os juízes quanto à nasalidade e uso de AC. Foram formados quatro grupos de dados: G1 amostras sem hipernasalidade e sem AC (N=191); G2 amostras com hipernasalidade e sem AC (N=288); G3 amostras com hipernasalidade e com fricativa faríngea (N=33); G4 amostras com hipernasalidade e golpe de glote (N=41). Resultados: O teste estatístico ANOVA revelou diferença significante entre as médias de nasalância entre os 4 grupos (p<0,0001). Os resultados evidenciaram valores de nasalância significativamente mais elevados para os 3 grupos com hipernasalidade de fala (G2, G3, G4) em relação ao grupo sem hipernasalidade (G1). Este estudo também evidenciou que o uso da fricativa faríngea (G3) em amostras com hipernasalidade resultou em escores de nasalância significativamente mais altos do que observado nas amostras somente com hipernasalidade (G2), particularmente para os sons fricativos /f/ e /s/. Conclusão: A presença da AC, particularmente da fricativa faríngea, na presença da hipernasalidade teve um impacto nos valores de nasalância para os estímulos com os sons /f/ e /s/, os quais se mostraram aumentados em relação ao grupo com hipernasalidade e sem AC (G2). Futuros estudos podem auxiliar com dados normativos em nasometria para amostras de fala com AC sendo necessário um maior número de amostras de fala representativas do uso produções articulatórios com pontos atípicos. / Introduction: Studies have been conducted to investigate variables that can affect nasalance scores. The hypothesis that the presence of compensatory articulation (CA), particularly pharyngeal fricative and glottal stops, can have an impact in nasalance values has been made in this study. Objectives: To obtain speech samples representative of productions with and without hypernasality, glottal stops and pharyngeal fricatives; To classify the samples according to auditory-perceptual ratings by multiple judges; To compare nasalance values between samples with and without CA. Material and methods: The samples for this study were obtained from 43 individuals with history of cleft palate with and without velopharyngeal dysfunction. Each individual was required to repeat 24 phrases (speech stimuli) originating 1032 audio recordings and their respective nasometric values. A total of 172 samples were excluded due to inadequate quality, and the remaining 860 samples were submitted to auditory-perceptual ratings by 3 listeners. The 553 samples rated with 100% agreement among the judges regarding nasality and CA were maintained in the study. Four groups were identified: G1 included samples without hypernasality and without CA (N=191); G2 included samples witht hypernasality and without CA (288); G3 included samples with hypernasality and with pharyngeal fricative (N=33); G4 included samples with hypernasality and with glottal stop (N=41). Results: The statistical test ANOVA revealed significant difference between nasalance values for all 4 groups (p<0,0001). Results showed nasalance scores significantly higher for the 3 groups with hypernasality (G2, G3, and G4) in relation to the group without hypernasality and without CA (G1). The study revealed that the use of pharyngeal fricative (G3) in samples with hypernasality resulted in nasalance score significantly higher than the those identified for the samples with hypernasality but without CA (G2), and the significance was found for productions involving /f/ and /s/. Conclusion: the presence of CA, particularly pharyngeal fricative (G3), had an impact in nasalance values for the stimuli with /f/ and /s/, with scores significantly higher for the samples with pharyngeal fricative and with hypernasality when compared to the samples only with hypernasality (G2). Future studies can contribute with normative data for speech samples with CA requiring a larger samples representative of use of atypical place of production.

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