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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.
21

THE EFFECTS OF NOISE EXPOSURE AT VARIOUS AGES ON AHL GENE EXPRESSION

NOLTE, MANDEE L. 14 July 2005 (has links)
No description available.
22

Programas de reabilitação auditiva para idosos: uma proposta alternativa de avaliação de eficácia

Lombardi, Christiane Mara 27 February 2009 (has links)
Made available in DSpace on 2016-04-27T18:12:40Z (GMT). No. of bitstreams: 1 Christiane Mara Lombardi.pdf: 1385912 bytes, checksum: 328011c61fba9727cf9df90c8404a529 (MD5) Previous issue date: 2009-02-27 / Coordenação de Aperfeiçoamento de Pessoal de Nível Superior / Theme: The majority of the elderly people with presbycusis can benefit from group hearing rehabilitation. The literature on this subject evaluated those programs as effective. Therefore, the literature does not point the origin of this effectiveness. Based on the information collected from these literature, a private hospital located in São Paulo created the Hearing Aid User Support Group GAUAA, which consists of four monthly meetings. Purpose: To find out the effectivness of a group hearing rehabilitation program for the elderly through shifting from quantitative data to qualitative data. Method: Thirty subjects, hearing aid users with monoaural adaptation, showing moderate to severe hearing loss with ages between seventy and ninety-two years old have participated in this research. This study provided two situations: on situation I, the International Outcome Inventory for Hearing Aids questionnaire (IOI-HÁ) was applied before and after the program. The objetive was to evaluate the user degree of satisfaction. The collected data were submeted to the Wilcoxon test method analysis and analysed through the Spearman correlation method. The situation II was divided in two phases: on phase I, the subjects statements were collected and analysed after the program. At phase II, the subjects statements were analysed during the GAUAA meetings. These data were analysed by the french line of the speech analysis proposed by Orlandi(1996). Results: The data found at situation I were statistically significant, but they could not indicate what would be the reason for the positive effectiveness responses from the clinical perpective. Thus, the situation II through the qualitative analysis, made possible to observe the subjects singularities, which suggested that the effectiveness of a hearing rehabilitation program is due to the identification among the participants and by transference, sustained by the coordinator´s position. The GAUAA effectiveness derives from the ludical speech dominance, which its effects promote the effectiveness of the hearing aid use / Tema: possíveis benefícios de um grupo de apoio voltado a idosos com presbiacusia e usuários de auxiliar auditivo. Objetivo: por meio da articulação entre dados quantitativos e dados qualitativos, localizar a origem da eficácia de um programa de reabilitação auditiva em grupo de idosos. No geral, embora a literatura sobre o tema aborde esse aspecto, não há ainda estudos que propõem parâmetros de atuação e estratégias que levem ao uso sistemático do auxiliar auditivo por parte dessa população. Método: participaram deste estudo 30 sujeitos com perda auditiva de grau moderado a severo, na faixa etária de 70 a 92 anos, usuários de auxiliar auditivo com adaptação monoaural e participantes do Grupo de Apoio ao Usuário de Auxiliar Auditivo GAUAA, criado em um hospital privado de São Paulo, sendo o trabalho desenvolvido em quatro encontros mensais. Foram analisadas duas situações: a Situação I, em que foi aplicado o questionário QI-AASI (Questionário Internacional-Aparelho De Amplificação Sonora Individual), antes e depois do programa, para avaliar o grau de satisfação do usuário. Os achados foram submetidos ao método de análise dos Testes dos Postos Sinalizados de Wilcoxon. A situação II foi dividida em duas etapas: na 1ª etapa procedeu-se à coleta e análise de depoimentos dos usuários após o programa, e na 2ª etapa, à análise dos dizeres dos participantes durante as reuniões do GAUAA. Esses dados foram analisados à luz da metodologia de Análise de Discurso de linha francesa, articulada à tipologia do discurso proposta por Orlandi(1996). Resultados: Os achados da situação I mostraram-se estatisticamente significantes, mas, clinicamente, não indicaram o que provocava as respostas positivas sobre a participação no GAUAA. Já a situação II, em que foi utilizada a metodologia qualitativa, possibilitou observar a singularidade dos sujeitos, sugerindo que a eficácia de um programa de reabilitação auditiva se dá pela identificação entre os participantes e pela transferência sustentada pela posição do coordenador. Concluiu-se que a eficácia do GAUAA deriva da dominância do discurso lúdico, cujos efeitos promovem a efetividade do uso do auxiliar auditivo
23

Effects of Age and Hearing Loss on Perception of Dynamic Speech Cues

Szeto, Mei-Wa Tam 07 November 2008 (has links)
Older listeners, both with and without hearing loss, often complain of difficulty understanding conversational speech. One reason for such difficulty may be a decreased ability to process the rapid changes in intensity, frequency, or temporal information that serve to differentiate speech sounds. Two important cues for the identification of stop consonants are the duration of the interruption of airflow (i.e., closure duration) and rapid spectral changes following the release of closure. Many researchers have shown that age and hearing loss affect a listener's cue weighting strategies and trading relationship between spectral and temporal cues. The study of trading relationships between speech cues enables researchers to investigate how much various listeners rely on different speech cues. Different cue weighting strategies and trading relationships have been demonstrated for individuals with hearing loss, compared to listeners with normal hearing. These differences have been attributed to the decreased ability of the individuals with hearing loss to process spectral information. While it is established that processing of temporal information deteriorates with age, it is not known whether the speech processing difficulties of older listeners are due solely to the effects of hearing loss or to separate age-related effects as well. The present study addresses this question by comparing the performance on a series of psychoacoustic and speech identification tasks of three groups of listeners (young with normal-hearing, older with normal-hearing, and older with impaired hearing) using synthetic word pairs ("slit" and "split"), in which spectral and temporal cues are altered systematically. Results of the present study suggest different cue weighting strategies and trading relationships for all three groups of listeners, with older listeners with hearing loss showing the least effect of spectral cue changes and young listeners with normal hearing showing the greatest effect of spectral cue changes. Results are consistent with previous studies showing that older listeners with and without hearing loss seem to weight spectral information less heavily than young listeners with normal hearing. Each listener group showed a different pattern of cue weighting strategies when spectral and temporal cues varied.
24

Avaliação das habilidades auditivas e da percepção de fala em idosos usuários de Aparelho de Amplificação Sonora Individual: esudo piloto

Fonseca, Angélica Biazus Mendonça da 30 July 2014 (has links)
Made available in DSpace on 2016-04-27T18:12:04Z (GMT). No. of bitstreams: 1 Angelica Biazus Mendonca da Fonseca.pdf: 1023006 bytes, checksum: 7b98b5a4e17c9dfd3812a282a98cb50f (MD5) Previous issue date: 2014-07-30 / processing, associated with the decline of working memory and attention. The comprehension of speech is a highly specialized activity and involves the perception and cognition. The objective of this study was to investigate whether the assessment of auditory skills and speech perception in the elderly, new users of Individual sound amplification device, assists in the process of selection and adaptation of AASI. Methods: we selected 15 individuals with sensorineural hearing loss from mild to moderate degree, new users of bilateral hearing aids, aged between 60 and 75 years. The subjects were assessed by means of Duration Pattern Sequence Test (DPST), Dichotic Digits Test (DDT), Differential Limen of Intensity (DLI), Index of Sentence Recognition (ISR) in quiet and in noise, Sentence Recognition Threshold (SRT) in quiet and in noise and by self-evaluation questionnaire auditory handicap for senior citizens (HHIE-S) in two instances: without hearing aid (first evaluation), and after 3 months (2nd evaluation). Results: tests, DLI only in LE, SRT in noise , SRT in quiet and ISR in quiet showed that there were no statistically significant difference between the two evaluations. In the remaining tests there is difference statistically significant between the assessments. Conclusion: The proposed tests may be part of the process of adaptation of the HEARING AID, because they contribute to the extent of satisfaction and performance, allowing the audiologist forward to hearing/cognitive rehabilitation when necessary / Com a diminuição da audição periférica, ocorre uma piora no processamento da informação, associada ao declínio da memória de trabalho e atenção. A compreensão da fala é uma atividade altamente especializada e envolve basicamente a percepção e a cognição. O objetivo deste estudo foi investigar se a avaliação das habilidades auditivas e de percepção de fala em idosos, novos usuários de Aparelho de Amplificação Sonora Individual (AASI), auxilia no processo de seleção e de adaptação do AASI. Métodos: Foram selecionados 15 indivíduos portadores de perda auditiva neurossensorial de grau leve a moderado, novos usuários de próteses auditivas bilaterais, com idades entre 60 e 75 anos. Os sujeitos foram avaliados por meio dos testes de Duration Pattern Sequence (DPS), Teste Dicótico de Dígitos (TDD), Limiar Diferencial de Intensidade (LDI), Pesquisa do Índice de reconhecimento de sentenças (IRS) no silêncio e no ruído, Pesquisa do Limiar de reconhecimento para sentenças (LRS) no silencio e no ruído e pelo questionário de auto avaliação do handicap auditivo para idosos (HHIE-S) em dois momentos: sem próteses (1ª avaliação), e após 3 meses (2ª avaliação). Resultados: Somente nos testes de LDI na OE, LRS no silêncio e no ruído, e IRS no silêncio não mostraram diferenças estatisticamente significantes entre as duas avaliações. Nos demais testes houve diferença estatisticamente significante entre as avaliações. Conclusão: Os testes propostos poderão fazer parte do processo de adaptação do AASI, pois contribuem na medida de satisfação e desempenho, permitindo ao fonoaudiólogo encaminhar para a reabilitação auditiva/cognitiva, quando for necessário
25

Effects of Age, Age-Related Hearing Loss, and Contralateral Cafeteria Noise on the Discrimination of Small Frequency Changes: Psychoacoustic and Electrophysiological Measures

Bertoli, Sibylle, Smurzynski, Jacek, Probst, Rudolf 01 September 2005 (has links) (PDF)
The aim of the study was to examine central auditory processes compromised by age, age-related hearing loss, and the presentation of a distracting cafeteria noise using auditory event-related potentials (ERPs). In addition, the relation of ERPs to behavioral measures of discrimination was investigated. Three groups of subjects participated: young normal hearing, elderly subjects with normal hearing for their age, and elderly hearing-impaired subjects. Psychoacoustic frequency discrimination thresholds for a 1000-Hz pure tone were determined in quiet and in the presence of a contralateral cafeteria noise. To elicit ERPs, small frequency contrasts were presented with and without noise under unattended and attended conditions. In the attended condition, behavioral measures of d′ detectability and reaction times were also obtained. Noise affected all measures of behavioral frequency discrimination significantly. Except N1, all ERP components in the standard and difference waveforms decreased significantly in amplitude and increased in latency to the same degree in all three subject groups, arguing against a specific age-related sensitivity to the effects of contralateral background noise. For N1 amplitude, the effect of noise was different in the three subject groups, with a complex interaction of age, hearing loss, and attention. Behavioral frequency discrimination was not affected by age but deteriorated significantly in the elderly subjects with hearing loss. In the electrophysiological test, age-related changes occurred at various levels. The most prominent finding in the response to the standard stimuli was a sustained negativity (N2) following P2 in the young subjects that was absent in the elderly, possibly indicating a deficit in the inhibition of irrelevant information processing. In the attended difference waveform, significantly larger N2b and smaller P3b amplitudes and longer N2b and P3b latencies were observed in the elderly indicating different processing strategies. The pronounced age-related changes in the later cognitive components suggest that the discrimination of difficult contrasts, although behaviorally maintained, becomes more effortful in the elderly.
26

Prevalência de perda auditiva autorrelatada em idosos do município de Juiz de Fora, MG e fatores associados

Caruso, Maritza Fabiany Breder 20 December 2013 (has links)
Submitted by Renata Lopes (renatasil82@gmail.com) on 2016-09-08T11:20:09Z No. of bitstreams: 1 maritzafabianybredercaruso.pdf: 822418 bytes, checksum: 80e8945a8c0bf788e79da29f6af6305c (MD5) / Approved for entry into archive by Diamantino Mayra (mayra.diamantino@ufjf.edu.br) on 2016-09-09T10:51:42Z (GMT) No. of bitstreams: 1 maritzafabianybredercaruso.pdf: 822418 bytes, checksum: 80e8945a8c0bf788e79da29f6af6305c (MD5) / Made available in DSpace on 2016-09-09T10:51:42Z (GMT). No. of bitstreams: 1 maritzafabianybredercaruso.pdf: 822418 bytes, checksum: 80e8945a8c0bf788e79da29f6af6305c (MD5) Previous issue date: 2013-12-20 / A perda auditiva (PA), terceira condição crônica mais prevalente em idosos, traz prejuízos funcionais, além de gastos com a saúde pública. Poucos são os estudos no Brasil que se preocupam em verificar a prevalência desta afecção e seus fatores associados, dentre estes a falta de discussões relacionadas ao nível de escolaridade como fator predisponente para a PA do idoso. O objetivo deste estudo foi determinar a prevalência de PA autorrelatada em indivíduos com 65 anos ou mais, moradores da comunidade, e participantes do estudo sobre fragilidade em idosos brasileiros – FIBRA – JF e investigar os possíveis fatores associados. Este estudo, de delineamento transversal, é derivado do Estudo Multicêntrico sobre Fragilidade em Idosos Brasileiros, denominada Rede FIBRA. A amostra foi composta por 427 idosos de Juiz de Fora. Foram considerados sujeitos com PA autorrelatada os idosos que preencheram os seguintes critérios: (1) declararam não ouvir bem para a questão “O (a) senhor (a) ouve bem?”; (2) respondeu sim para a questão “O (a) senhor (a) usa aparelho auditivo?”. Estudou-se a associação da PA autorrelatada com variáveis sóciodemográficas, clínicas, comportamentais e funcionais. A análise dos dados foi feita pelo programa SPHINX LEXICA & EURECA V. 5, utilizando-se o método de teste do Quiquadrado (χ²). Foi encontrada uma prevalência de 24,4% de PA autorrelatada. Observou-se forte associação desse distúrbio com a variável idade (p<0,05). A média de idade encontrada para os que relataram não ouvir bem 77,09 anos. As demais variáveis predisponentes analisadas não representaram fatores significantes. Foram verificadas associações significativamente estatísticas somente para alguns itens das escalas funcionais, a saber: dirigir automóveis, uso do telefone, preparo de alimentos, uso de medicação, cuidado com a saúde, nível de atividade, sentir-se cheio de energia e satisfação com a memória. Conclui-se que a prevalência de PA autorrelatada encontrada nesta população apresentou divergências com outras pesquisas. A variável idade foi a principal associação estabelecida. As associações com as variáveis funcionais sugerem que a PA pode ser primordialmente um fator causador de prejuízos funcionais, porém, necessita-se de estudos mais específicos visando estabelecer melhor esta correlação. / Hearing Loss (HL), the third most prevalent chronic condition in the elderly, brings functional impairment, as well as spending on public health. There are few studies in Brazil which verify the prevalence of this disease and its associated factors, such as the lack of discussions related to level of education as a predisposing factor for HL in the elderly. The aim of this study was to determine the prevalence of HL reported in individuals aged 65 years or over, community residents, and participants of a study about frailty in elderly Brazilians - FIBER - JF and investigate possible associated factors. This cross-sectional study is derived from the Multicenter Study on Fragility of the Brazilian Elderly, called "Rede FIBRA". The sample consisted of 427 elderly citizens from Juiz de Fora. Senior citizens with HL who met the following criteria were included as subjects: (1) those who reported not hearing well the question "Do you hear well?", (2) those who answered yes to the question "Do you wear any hearing aid?". From there, we studied the association of HL with socio-demographic, clinical, behavioral and functional variables. Data analysis was made using SPHINX LEXICA & EURECA V. 5, setting the frequency of each variable in the sample surveyed, using the Chisquare test (χ²) method. A prevalence of 24.4% of PA was found. There was a strong association of this disorder with variable age (p<0.05). The average age for those who reported they could not hear well was 77.09 years. The other predisposing variables analyzed did not represent significant factors. HL were associated to only some items of the functional scales, namely driving a car, using the phone, food preparation, use of medication, health care, activity level, feeling full of energy and satisfaction with memory. It can be concluded that the prevalence of HL in this population there were differences with other research findings. The age variable was the main association established. The associations with functional variables suggest that HL may be primarily a factor which causes functional impairment, however, it requires more specific studies to better establish this correlation.
27

Privation sensorielle auditive et réhabilitation chez le sujet âgé : conséquences sur le fonctionnement cognitif / Auditory deprivation and rehabilitation in the elderly : consequences on cognitive functioning

Leusie, Séverine 20 March 2015 (has links)
La presbyacousie est une maladie qui concernerait plus de 12 millions de Français mais qui reste peu connue. Si elle n'est pas traitée tôt, elle peut entraîner de graves complications comme des troubles de la communication, de la dépression et des troubles cognitifs. Le constat actuel est que très peu de presbyacousiques sont traités, et lorsqu'ils le sont, le résultat semble insuffisant. L'objet de cette thèse est de proposer à partir des connaissances actuelles, des solutions adaptées aux besoins de ces patients, du dépistage à la réadaptation. Trois études ont été menées : l'étude « AcoumAudio », déclinée en trois volets a montré que l'acoumétrie vocale était un bon test de dépistage de la surdité chez les personnes âgées, d'évaluation du degré de perte auditive et de mesure du gain auditif fonctionnel après réhabilitation ; l'étude 1 intitulée « Privation sensorielle auditive et fonctionnement cognitif chez le sujet âgé (ACADem) » a montré que le port d'un appareillage auditif pouvait préserver d'une dégradation cognitive ; et l'étude 2 intitulée « Faisabilité d'une Réhabilitation Conjointe Audioprothétique et Orthophonique pour les Presbyacousiques (FRéCAOP) » a montré qu'il était possible de proposer une prise en charge plus complète et efficiente de la presbyacousie, dans un circuit de l'audition du GRAPsanté, incluant nécessairement un Aidant / Presbycusis is a disease that occurs in more than 12 million French people, but which is still not well known. If it is not treated early, it can lead to serious complications such as communication disorders, depression and cognitive impairment. The current situation is that very few presbycusic patients are treated, and when they are, the result seems insufficient. The purpose of this thesis is to propose using current data, solutions tailored to the needs of these patients, from screening to rehabilitation. Three studies were conducted: the "AcoumAudio" Study, available in three components showed that the vocal acoumetry was a good hearing test to screen elderly people, to evaluate the degree of hearing disorders and to measure functional auditory gain after rehabilitation; Study 1 entitled "Auditory deprivation and cognitive functioning in the elderly" showed that wearing hearing aids could preserve from cognitive deterioration; and Study 2 entitled "Feasibility of a Conjoint Rehabilitation involving audiology and speech therapy for presbycusis (FRéCAOP)" showed that it was possible to offer a more complete and efficient management of presbycusis, in the hearing circuit of GRAPsanté, necessarily including a caregiver
28

A Comparison of Behavioral and Auditory Brainstem Response Measures of Hearing in the Laboratory Rat (Rattus norvegicus)

Hill, Evan Matthew January 2011 (has links)
No description available.
29

Encodage neuronal des sons de parole : développements méthodologiques, générateurs neuronaux et application au malentendant appareillé / Neural encoding of speech sounds : methodological developments, neural generators, and application to hearing aid users

Bellier, Ludovic 25 September 2015 (has links)
A ce jour, six millions de français sont atteints de troubles de l'audition. Face à ce problème de santé publique, des outils performants d'exploration de la fonction auditive sont indispensables. La Speech ABR (Speech Auditory Brainstem Response ou Réponse du tronc cérébral auditif à la parole) est un outil prometteur, comme marqueur électrophysiologique fin de l'encodage neuronal de la parole. Cependant, sa méthodologie reste peu développée, son origine neuronale incertaine et elle n'a jamais été enregistrée chez le malentendant porteur d'aides auditives. Le premier axe de cette thèse porte sur les générateurs neuronaux de la Speech ABR. Le développement d'une méthodologie de recueil topographique de cette réponse jusqu'alors décrite comme strictement sous-corticale, a d'abord suggéré la possibilité d'un générateur cortical. Une étude en stéréo-électroencéphalographie a ensuite confirmé l'existence d'une activité Speech ABR dans les cortex auditifs primaires bilatéraux. Ce résultat apporte un éclairage nouveau sur la représentation des sons de parole par système nerveux auditif. Le second axe concerne l'étude de la Speech ABR chez le malentendant appareillé. Après avoir développé une méthodologie de stimulation acoustique directement au travers des aides auditives, nous avons étudié la plasticité neuronale induite par le port d'aides auditives. Les résultats montrent une amélioration de l'identification des phonèmes amplifiés, liée à une représentation corticale modifiée et à un encodage fréquentiel rééquilibré. Ces toutes premières preuves de plasticité neuronales dès les 4 premiers mois d'utilisation des aides auditives ouvrent de nouveaux espoirs thérapeutiques / To date, six million French are hearing impaired. To address this public health issue, efficient tools for exploration of the hearing function are essentials. Speech ABR (Speech Auditory Brainstem Response) is a promising tool, being a fine electrophysiological marker of the neuronal encoding of speech. Though, its methodology remains underdeveloped, its neural origin is still uncertain, and it has never been recorded in hearing aid users. The first axis of this thesis focuses on the neural generators of Speech ABR. The development of a methodology for recording topographies of this response, up to now described as strictly subcortical, first suggested the possibility of a cortical generator. A stereo-electroencephalography study then confirmed the existence of Speech ABR activity in bilateral primary auditory cortices. This result sheds a new light on the representation of speech sounds within the auditory nervous system. The second axis concerns the study of Speech ABR in hearing aid users. After having developed a methodology of acoustic stimulation directly through hearing aids, we investigated neural plasticity induced by hearing aid use. Results show an improvement in the identification of amplified phonemes, linked to an altered cortical representation and a rebalanced frequency encoding. This very first evidence of neural plasticity as soon as the first four months of hearing aid use opens up new therapeutic hopes

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