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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.
181

Perception of contour tones produced by Cantonese dysarthric speakers

Lee, Wing-ka. January 2002 (has links)
Thesis (B.Sc)--University of Hong Kong, 2002. / "A dissertation submitted in partial fulfilment of the requirements for the Bachelor of Science (Speech and Hearing Sciences), The University of Hong Kong, 10th May, 2002." Also available in print.
182

The perception of Cantonese aspirated consonants at different signal-to -noise ratios

Wong, Mun-yiu, Gladys. January 1900 (has links)
Thesis (B.Sc)--University of Hong Kong, 1993. / "A dissertation submitted in partial fulfilment of the requirements for the Bachelor of Science (Speech and Hearing Sciences), The University of Hong Kong, April, 30, 1992 [i.e. 1993]. Also available in print.
183

The effect of phonological similarity on the auditory memory span

Cheung, Sze-man, May. January 1995 (has links)
Thesis (B.Sc)--University of Hong Kong, 1995. / "A dissertation submitted in partial fulfilment of the requirements for the Bachelor of Science (Speech and Hearing Sciences), The University of Hong Kong, April 28, 1995." Also available in print.
184

Spectral and temporal integration of brief tones

Hoglund, Evelyn M., January 2007 (has links)
Thesis (Ph. D.)--Ohio State University, 2007. / Title from first page of PDF file. Includes bibliographical references (p. 105-107).
185

Auditory memory of persons with Down's syndrome /

Parker, Phoebe I., January 1900 (has links)
Thesis (Ph. D.)--Ohio State University, 1984. / Includes vita. Includes bibliographical references (leaves 87-98). Available online via OhioLINK's ETD Center.
186

Data density and trend reversals in auditory graphs effects on point estimation and trend identification tasks /

Nees, Michael A. January 2007 (has links)
Thesis (M. S.)--Psychology, Georgia Institute of Technology, 2007. / Bruce N. Walker, Committee Chair ; Wendy Rogers, Committee Member ; Gregory Corso, Committee Member.
187

Processamento auditivo temporal = desempenho auditivo de escolares no teste Gin - Gap in noise / Auditory temporal processing : performance of scholar children in the Gin test - Gaps-in-noise

Amaral, Maria Isabel Ramos do, 1985- 15 August 2018 (has links)
Orientador: Maria Francisca Colella dos Santos / Dissertação (mestrado) - Universidade Estadual de Campinas. Faculdade de Ciencias Medicas / Made available in DSpace on 2018-08-15T11:11:07Z (GMT). No. of bitstreams: 1 Amaral_MariaIsabelRamosdo_M.pdf: 1420654 bytes, checksum: c7d0599bdf59bfdddfc518840deac9b7 (MD5) Previous issue date: 2010 / Resumo: Introdução: A habilidade auditiva denominada resolução temporal consiste no tempo mínimo necessário para resolver eventos acústicos, sendo fundamental para a compreensão de fala, e pode ser avaliada por testes de detecção de gap, dentre eles o teste GIN - Gaps In Noise. Objetivo: verificar o desempenho da resolução temporal em crianças sem queixas auditivas e/ou dificuldades escolares, na aplicação do teste GIN, considerando-se o gênero masculino e feminino e a faixa etária de 8, 9 e 10 anos. Forma do estudo: corte transversal. Material e Método: Os sujeitos foram divididos em três grupos, sendo 25 crianças de 8 anos no grupo I, 25 crianças de 9 anos do grupo II e 25 crianças de 10 anos no grupo III. Inicialmente, foram realizados os seguintes procedimentos: anamnese, meatoscopia, avaliação audiológica básica e avaliação simplificada do processamento auditivo. As crianças que apresentaram resultados dentro dos padrões de normalidade descritos nos procedimentos realizados foram submetidas ao teste GIN - Gaps In Noise. O teste GIN, gravado em CD, foi aplicado por meio de Audiômetro Interacoustics AC40 acoplado a um Compact Disc (CD) Philips, em cabina acústica, numa intensidade de 50 dBNS. Resultados: Não foram encontradas diferenças significantes em relação às variáveis orelha e faixa etária. O gênero masculino obteve desempenho levemente melhor do que o feminino em relação apenas à porcentagem de acertos. O teste GIN é uma ferramenta prática e confiável para avaliar a habilidade de resolução temporal em crianças, sendo importante no diagnóstico precoce de possíveis alterações do processamento temporal Conclusão: O limiar de detecção de gap e porcentagem de acertos foram calculados independente das variáveis orelha, gênero e faixa etária, sendo encontrados os valores de 4,7ms e 73,6%, respectivamente / Abstract: Introduction: Temporal resolution hearing skills are based on the minimum time necessary to solve acoustic events, which is fundamental for speech comprehension and can be assessed throught gap detection tests, as the Gaps-in-noise test (GIN). Aim: the aim of the present study was to check the performance of temporal process ability in children with no hearing and/or school difficulties through GIN test, considering both genders and ages between 8 and 10 years old. Study design: cross-sectional. Material and method: The subjects were divided into 3 groups: Group I (25 eight-year old children), Group II (25 nine-year old children) and Group III (25 ten-year old children). At first, the following procedures were done: anamnesis, otoscopy, hearing assessment and a simple auditory processing assessment. The children with results according to normality, described in the procedures used, were submitted to GIN test - Gaps In Noise. The GIN test, recorded in CD, was used through the Interacoustics Audiometers AC40, with a Philips Compact Disc (CD), in an acoustic cabin, with an intensity of 50 dB NS.Results: The findings revealed no statistical difference among age groups or ear. The male gender presented slightly better responses than did the female group on percentage of correct responses only. the gin test is a valuable and reliable tool for assessing temporal resolution on children, being an important test for early diagnosis of possible temporal process disorders. Conclusion: The gap threshold and percentage of correct responses were calculated regardless of the ear, gender or age, and were respectively 4,7ms and 73,6% / Mestrado / Saude da Criança e do Adolescente / Mestre em Saude da Criança e do Adolescente
188

Redução de dimensionalidade usando Isomap aplicada ao áudio espacial / Dimensionality reduction using Isomap applied to spatial audio

Grijalva Arévalo, Felipe Leonel, 1984- 26 August 2018 (has links)
Orientadores: Luiz César Martini, Siome Klein Goldenstein / Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia Elétrica e de Computação / Made available in DSpace on 2018-08-26T03:56:26Z (GMT). No. of bitstreams: 1 GrijalvaArevalo_FelipeLeonel_M.pdf: 1718764 bytes, checksum: cfa07a9c26c4179bec4656e94680c0b1 (MD5) Previous issue date: 2014 / Resumo: Conforme as aplicações de realidade aumentada tornam-se mais relevantes, há um crescente esforço na pesquisa do áudio espacial. O termo áudio espacial refere-se ao conjunto de técnicas onde a anatomia de uma pessoa (i.e. o pavilhão da orelha, a cabeça e o torso) é modelada por meio de filtros digitais. Ao filtrar uma fonte de áudio através desses filtros, o ouvinte é capaz de perceber um som como se ele fosse reproduzido em um local específico no espaço. No domínio da frequência, esses filtros são conhecidos como Funções de Transferência Relativas à Cabeça (Head-Related Transfer Functions, HRTF). Nesta dissertação, estabelecem-se os princípios básicos do áudio espacial, fornecendo uma analise das características espectrais das HRTFs. Além disso, como essas características espectrais diferem de uma pessoa para outra, propõe-se um novo método baseado em antropometria para personalizar HRTFs no plano horizontal. O método usa o Isomap, redes neurais artificias e um procedimento de reconstrução baseado na vizinhança. Assim, modificou-se a construção do grafo do Isomap para ressaltar a individualidade das HRTFs e efetuar uma redução de dimensionalidade não linear das HRTFs. Em seguida, utilizou-se uma rede neural artificial para modelar as relações não lineares entre as características antropométricas e as HRTFs de baixa dimensionalidade. E finalmente, usou-se uma abordagem de reconstrução com base na vizinhança para reconstruir a HRTF a partir do seu equivalente de baixa dimensionalidade. As simulações mostram que a abordagem proposta tem um desempenho melhor do que o PCA (Principal Component Analysis, Analise de Componentes Principais) e confirmam que o Isomap é capaz de descobrir as relações não lineares subjacentes da percepção auditiva / Abstract: As auditory augmented reality applications become more important, there is increasing effort in spatial audio research. The term spatial audio refers to techniques where a person's anatomy (i.e. the pinnae, head and torso) is modeled as digital filters. By filtering a sound source with these filters, a listener is capable of perceiving a sound as though it were reproduced at a specific spatial location. In the frequency domain, these filters are known as Head-Related Transfer Functions (HRTFs). This thesis states the basic principles of spatial audio and provides an analysis of the spectral characteristics of HRTFs. Moreover, since these spectral features differ among individuals, we introduce a new anthropometric-based method for customizing of HRTFs in the horizontal plane. The method uses Isomap, artificial neural networks (ANN), and a neighborhood-based reconstruction procedure. We first modify Isomap's graph construction step to emphasize the individuality of HRTFs and perform a customized nonlinear dimensionality reduction of the HTRFs. We then use an ANN to model the nonlinear relationship between anthropometric features and our low-dimensional HRTFs. Finally, we use a neighborhood-based reconstruction approach to reconstruct the HRTF from the estimated low-dimensional version. Simulations show that our approach performs better than PCA (Principal Component Analysis) and confirm that Isomap is capable of discovering the underlying nonlinear relationships of sound perception / Mestrado / Engenharia de Computação / Mestre em Engenharia Elétrica
189

Die voorkoms van lees- en spellingprobleme by leerlinge met ouditief-perseptuele uitvalle

Basson, Marlize 04 February 2014 (has links)
M.Ed. / Please refer to full text to view abstract
190

Perception of the missing fundamental in patients with low frequency hearing loss

Horvath, Gary Paul January 1988 (has links)
The perception of the pitch of a harmonic complex tone missing its fundamental frequency was investigated in patients with unilateral sensorineural low-frequency hearing loss. Using a two-alternative forced choice adaptive method and an adjustment technique, patients matched the pitch of a complex tone consisting of the 3rd-7th or 3rd-10th harmonics, with a pure tone. Component frequencies were chosen such that they would fall within the intact portion of the patient's damaged ear, but whose fundamental frequency would fall within the damaged frequency area. Pitch matches were made monaurally and binaurally, with and without low-pass filtered noise. Results indicated that the patients tended to match the pitch of the lacking fundamentals to the complexes even though the frequency of the residue pitch fell within the range of elevated pure tone thresholds. It is concluded that information regarding the residue pitch is not mediated by cochlear nerve fibers with characteristic frequencies corresponding to the fundamental. Temporal cues carried by fibers with characteristic frequencies corresponding to the partials within the complex stimulus are most likely involved in pitch perception. / Medicine, Faculty of / Cellular and Physiological Sciences, Department of / Graduate

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