Navegando por Palavras-chave "Psicoacústica"
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- ItemSomente MetadadadosAnalise comparativa entre os niveis de sensacao de intensidade para sons complexos de individuos com perda de audicao e as caracteristicas de amplificacao de suas proteses auditivas(Universidade Federal de São Paulo (UNIFESP), 1999) Menegotto, Isabela Hoffmeister [UNIFESP]A presente pesquisa foi desenvolvida no Ambulatorio da Disciplina de Disturbios da Audicao da Universidade Federal de São Paulo e teve como objetivo analisar os resultados das funcoes de crescimento da sensacao de intensidade obtidos com dois diferentes estimulos de faixa ampla de frequencias (fala e ruido branco), tanto para um grupo de individuos com perda de audicao, denominado Grupo Perda de Audicao, como para um grupo de individuos com audicao normal, denominado Grupo Controle, comparando as funcoes de ambos os Grupos. Ainda objetivou comparar as caracteristicas de amplificacao das proteses auditivas (funcoes de entrada e saida) utilizadas pelos individuos com perda de audicao e suas necessidades no sentido da restauracao dos padroes de crescimento da sensacao de intensidade obtidos com o Grupo Controle. Seu material consistiu das funcoes de crescimento da sensacao de intensidade para os estimulos de faixa ampla de frequencias de 30 individuos auditivamente normais, componentes do Grupo Controle, e de 18 usuarios de proteses auditivas, componentes do Grupo Perda de Audicao, bem como os valores de resposta de insercao (curva de entrada e saida) das proteses por eles utilizadas. Apos a analise dos resultados, concluiu-se que tanto no Grupo Controle como no Grupo Perda de Audicao, as funcoes para fala e ruido branco demonstraram ser diferentes de forma estatisticamente significante, com as funcoes para fala apresentando menor declividade que as para ruido branco. Em razao dessa diferenca, a fala tendeu a ser aceita em niveis mais intensos para os niveis de sensacao pesquisados, especialmente nas sensacoes mais altas. No Grupo Controle, onde foram estabelecidas curvas gerais e intervalos de confianca para dados e estimativa, verificou-se que os intervalos de confianca, para a fala, foram maiores nas sensacoes mais altas, enquanto que para ruido branco, foram maiores nas sensacoes medias. No Grupo Controle, o padrao de respostas para a fala apresentou uma tendencia para a identificacao de uma faixa de intensidades confortaveis; para ruido branco, e para ambos os estimulos no Grupo Perda de Audicao, houve uma distribuicao igualitaria das respostas entre os estimulos. As funcoes de crescimento da sensacao de intensidade obtidas no Grupo Controle e no Grupo Perda de Audicao foram diferentes de forma estatisticamente significante, tanto para fala como para ruido branco, com as funcoes do Grupo Perda de Audicao apresentando...(au)
- ItemAcesso aberto (Open Access)Classificação psicoacústica do zumbido persistente(Universidade Federal de São Paulo (UNIFESP), 2016-10-25) Suzuki, Flavia Alencar de Barros [UNIFESP]; Penido, Norma de Oliveira [UNIFESP]; http://lattes.cnpq.br/7060786297081212; http://lattes.cnpq.br/8460049642723926; Universidade Federal de São Paulo (UNIFESP)Objective: To propose a new classification of persistent tinnitus using psychoacoustic characteristics and its association to the degree of discomfort, the impact on quality of life, the pitch, loudness and its masking. Method: A total of 110 adult patients of both genders treated at the Tinnitus Outpatient Clinic of UNIFESP according to the inclusion and exclusion criteria were included in the study. Patients underwent otorhinolaryngological, audiological, Pitch Matching and Loudness, Visual Analogue Scale (VAS), Tinnitus Handicap Inventory (THI) and Minimum Masking Level (MML) assessment. Results: A total of 181 complaints of tinnitus were identified in these 110 patients, being 93 (51%) Pure Tone (PT), and 88 (49%) Noise; 19 Low Pitch and 162 High Pitch; with a mean VAS score in PT of 5.47 and Noise of 6.66; mean PT Loudness of 12.31 dBSL and Noise of 10.51 dBSL. As for THI and MML, the 110 patients were separated into 3 groups with tinnitus, PT, Noise and multiple tinnitus (PT+Noise), with a mean THI being higher in the group with multiple tinnitus, of 61.38. For MML, we used White Noise (WN) and Narrow Band (NB) masking noise for high and low frequency. There were similarities between the groups with PT and multiple tinnitus. In the Noise group, different responses were found when using the NB at low frequency. Conclusion: In this psychoacoustic classification of tinnitus it was observed that: there is an association between the type of tinnitus perception and the sounds produced in the audiometer; the PT type showed higher loudness; the Noise type caused more discomfort; Multiple tinnitus is the one with a more severe effect on quality of life and less intensity is required for masking tinnitus when the pitch is similar to the masking noise used.
- ItemEmbargoEstudos dos limiares de detecção de gap, com o uso do teste gin, em crianças de 11 e 12 anos(Universidade Federal de São Paulo (UNIFESP), 2009-01-28) Perez, Ana Paula [UNIFESP]; Pereira, Liliane Desgualdo [UNIFESP]; Universidade Federal de São Paulo (UNIFESP)INTRODUCTION: The ability to extract information from an acoustic event depends on the ability to discriminate their different spectral content and identify the order in which the noise vibrations occur in a given period of time. The temporal resolution is one of the auditory skills involved in temporal processing and refers to the rapid changes of the acoustic aspects related to the time, allowing, for example, the detection of a brief interruption between two sounds, or the detection of some form of modulation in a sound. The Gap In Noise (GIN) test was developed to study the temporal resolution. In this procedure the threshold of detection of gap is determined, that is, the shortest time, in milliseconds, in which an interruption of the sound stimulus is identified. OBJECTIVE The investigation if the behavior of temporal resolution through the Gap In Noise test in children of eleven and twelve years to subsidize the establishment of criteria of normality reference. METHODS: 92 children participated. All of them aged 11 and 12 years, enrolled in elementary school, without evidences of otologic, and/or neurological, and/or cognitive diseases, nor learning difficulties or history of school failure. Besides that, their hearing thresholds were within normal limits and their verbal recognition in the dichotic test of digits was equal or superior to 95% of hits. All were submitted to the Gap In Noise test. The responses were evaluated considering two measures of analysis: the threshold gap and the percentage of correct gap. The statistical analysis was performed by non-parametric tests with significance level of 0.05 (5 %). RESULTS: The average of the gap thresholds was 5.05 ms, and the average percentage of correct answers was 71.70%. There was no significant statistical difference between the responses by age of eleven and twelve years, by ear, right and left, by gender, male and female. However, when comparing the tests, it was observed that the 1st test showed a higher percentage of identifications of gap, statistically significant than the 2nd test. The confidence interval for the average of the gap detection thresholds, in milliseconds, were from 4.77 to 5.16 for the 1st test and from 4.93 to 5.35 for the 2nd test, and the percentages of hits were from 71.28 to 73.14% in the 1st test and from 69.42 to 72.17% in the 2nd test. CONCLUSION: The performance in the Gap in noise test, GIN, was similar in the ages of 11 and 12 years. The minimum value, in milliseconds, obtained for the threshold of temporal acuity was 3, and the maximum was 8. In 78.27% of the population of this study, the gap thresholds were up to 5 ms, response recommended as normality reference for the age group studied.
- ItemSomente MetadadadosImpacto na qualidade de vida e características psicoacústicas do zumbido em pacientes com surdez súbita e sua evolução após tratamento(Universidade Federal de São Paulo (UNIFESP), 2021) Oliveira, Manoela Paiva De [UNIFESP]; Onishi, Ektor Tsuneo [UNIFESP]; Universidade Federal de São PauloObjective: To evaluate the autoperception of tinnitus in patients with sudden sensorineural hearing loss and it’s relation to hearing thresholds evolution and degree of hearing recovery. Methods: A prospective study was developed at the Sudden Sensorineural Hearing Loss Clinic of the Department of Otorhinolaryngology and Head and Neck Surgery at Universidade Federal de São Paulo, from October 2018 to October 2019, with patients of both genders, with sudden sensorineural hearing loss and tinnitus, of any age. Exclusion criteria: central nervous system diseases, patients unable to understand verbal commands and non-acceptance to participate. 32 individuals were initially selected. The patients underwent anamnesis, physical examination, tonal and vocal audiometry with immittance and acuphenometry. Tinnitus Handicap Inventory and Visual Analog Scale were applied. All patients received medical treatment for sudden deafness. The data were analyzed using descriptive and inferential statistics. Values of p<0.05 were considered statistically significant. Results: Average age was 46.4 years. Fourteen were male and 18 were female. Tinnitus and sudden sensorineural hearing loss were present on the left side in 17 individuals (53.1%), on the right side in 14 (43.7%) and one patient had symptoms bilaterally (3.2%). 43.7% had comorbidities, with systemic arterial hypertension being the most common (28.1%), followed by hypothyroidism (18.7%), dyslipidemia (15.6%), and diabetes (12.5%). The initial pure tone average had a mean of 73.9 (median 74.5). Deep and severe hearing loss were present in equal proportions (28.1%), followed by moderate (25.0%) and mild (15.6%). One patient met criteria for normal hearing. Initial Tinnitus Handicap Inventory ranged from zero to 96, with a mean of 51.7. Categorizing the results, 15.6% had no impact; 12.5% had mild handicap; 31.3% had moderate handicap; 21,9% had severe handicap; and 18,8% had catastrophic handicap. The first Visual Analog Scale showed an average of 7.3. The majority of the patients (84.4%) had no defined etiology. The average time to start treatment was 8.4 days. Of the 28 patients who underwent the first acuphenometry, most had acute tinnitus (51.6%), narrow band sound (71%) and loudness between 5 and 15 dB SL (80.6%). After treatment, there was a statistically significant improvement in pure tone average and in Speech Recognition Percentage Index, and 57.1% presented total or partial hearing recovery. There were no significant relationships between the frequency most affected by sudden sensorineural hearing loss and variables such as tinnitus’ pitch or loudness, or impact on quality of life. Eighteen patients underwent a complete evaluation. There was no relation between recovery or hearing improvement and improvement in tinnitus. Comparing the pre- and post-treatment parameters there was a significant improvement only in the catastrophic THI. The time to start treatment did not show a significant relation with the variables. Conclusion: Most of the patients presented moderate discomfort and severe and profound hearing loss. After treatment, there was hearing recovery and significant improvement in Speech Recognition Percentage Index, as well as a significant reduction in catastrophic Tinnitus Handicap Inventory values.