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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

Top-Down Processes in Simulated Combined Electric-Acoustic Hearing: The Effect of Context and the Role of Low-Frequency Cues in the Perception of Temporally Interrupted Speech

Oh, Soo Hee 12 November 2014 (has links)
In recent years, the number of unilateral cochlear implant (CI) users with functional residual-hearing has increased and bimodal hearing has become more prevalent. According to the multi-source speech perception model, both bottom-up and top-down processes are important components of speech perception in bimodal hearing. Additionally, these two components are thought to interact with each other to different degrees depending on the nature of the speech materials and the quality of the bottom-up cues. Previous studies have documented the benefits of bimodal hearing as compared with a CI alone, but most of them have focused on the importance of bottom-up, low-frequency cues. Because only a few studies have investigated top-down processing in bimodal hearing, relatively little is known about the top-down mechanisms that contribute to bimodal benefit, or the interactions that may occur between bottom-up and top-down processes during bimodal speech perception. The research described in this dissertation investigated top-down processes of bimodal hearing, and potential interactions between top-down and bottom-up processes, in the perception of temporally interrupted speech. Temporally interrupted sentences were used to assess listeners' ability to fill in missing segments of speech by using top-down processing. Young normal hearing listeners were tested in simulated bimodal listening conditions in which noise band vocoded sentences were presented to one ear with or without low-pass (LP) filtered speech or LP harmonic complexes (LPHCs) presented to the contralateral ear. Sentences were square-wave gated at a rate of 5 Hz with a 50 percent duty cycle. Two factors that were expected to influence bimodal benefit were examined: the amount of linguistic context available in the speech stimuli, and the continuity of low-frequency cues. Experiment 1 evaluated the effect of sentence context on bimodal benefit for temporally interrupted sentences from the City University of New York (CUNY) and Institute of Electrical and Electronics and Engineers (IEEE) sentence corpuses. It was hypothesized that acoustic low-frequency information would facilitate linguistic top-down processing such that the higher context CUNY sentences would produce more bimodal benefit than the lower context IEEE sentences. Three vocoder channel conditions were tested for each type of sentence (8-, 12-, and 16-channels for CUNY; 12-, 16-, and 32-channels for IEEE), in combination with either LP speech or LPHCs. Bimodal benefit was compared for similar amounts of spectral degradation (matched-channels) and similar ranges of baseline performance. Two gain measures, percentage point gain and normalized gain, were examined. Experiment 1 revealed clear effects of context on bimodal benefit for temporally interrupted speech, when LP speech was presented to the residual-hearing ear, thereby providing additional support for the notion that low-frequency cues can enhance listeners' use of top-down processing. However, the bimodal benefits observed for temporally interrupted speech were considerably smaller than those observed in an earlier study that used continuous speech. In addition, unlike previous findings for continuous speech, no bimodal benefits were observed when LPHCs were presented to the LP ear. Experiments 2 and 3 further investigated the effects of low-frequency cues on bimodal benefit by systematically restoring continuity to temporally interrupted signals in the vocoder and/or LP ears. Stimuli were 12-channel CUNY sentences presented to the vocoder ear, and LPHCs presented to the LP ear. Signal continuity was restored to the vocoder ear by filling silent gaps in sentences with envelope-modulated, speech-shaped noise. Continuity was restored to signals in the LP ear by filling gaps with envelope-modulated LP noise or by using continuous LPHCs. It was hypothesized that the restoration of continuity in one or both ears would improve bimodal benefit relative to the condition in which both ears received temporally interrupted stimuli. The results from Experiments 2 and 3 showed that restoring continuity to the simulated residual-hearing or CI ear improved bimodal benefits, but that the greatest improvement was observed when continuity was restored to both ears. These findings support the conclusion that temporal interruption disrupts top-down enhancement effects in bimodal hearing. Lexical segmentation and perceptual continuity were identified as factors that could potentially explain the increased bimodal benefit for continuous, as compared to temporally interrupted, speech. Taken together, the findings from Experiments 1-3 provide additional evidence that low-frequency sensory information can provide bimodal benefit for speech that is spectrally and/or temporally degraded by improving listeners' ability to make use of top-down processing. Findings further suggest that temporal degradation reduces top-down enhancement effects in bimodal hearing, thereby reducing bimodal benefit for temporally interrupted speech as compared to continuous speech.
2

Англоязычные фразеологизмы с антропонимами: лингвокультурные характеристики и особенности перевода : магистерская диссертация / English phraseological units with anthroponyms: linguocultural characteristics and features of translation

Голенева, Е. В., Goleneva, E. V. January 2022 (has links)
Работа посвящена изучению особенностей перевода фразеологических единиц с компонентом антропонимом в составе на базе современной литературы. Материал исследования составили отрывки из произведений Стивена Кинга, Терри Праттчета и Нила Геймана. В Главе 1 мы даем определение понятия фразеологической единицы, рассматриваем основные классификации фразеологизмов (В.В. Виноградов, А.В. Кунин и т.д.) и общепринятые способы перевода. Затем мы рассматриваем место фразеологической единицы в разделе лингвокультурологии и ее особенности, как лингвокультурного феномена. В последнем пункте теоретической части мы разбираем основные способы перевода фразеологических единиц с антропонимом в составе. В Главе 2 данной работы мы проанализируем фразеологические единицы с компонентом антропонимом, взятые из отрывков произведений Стивена Кинга, Терри Праттчета и Нила Геймана, и посмотрим, какие переводческие стратегии были использованы, а также какие лингвокультурные тенденции можно наблюдать на их фоне. Основные выводы, а также практический материал, представленные в работе, могут быть использованы в курсе лексикологии английского языка, а также в курсе теории и практики перевода. / The work is devoted to the study of the features of the translation of phraseological units with an anthroponym component on the basis of modern literature. The material of the study was taken from books of Stephen King, Terry Pratchett and Neil Gaiman. In Chapter 1, we define the concept of a phraseological unit, consider the main classifications of phraseological units (V.V. Vinogradov, A.V. Kunin, etc.) and generally accepted methods of translation. Then we consider the place of the phraseological unit in the section of linguoculturology and its features as a linguocultural phenomenon. In the last paragraph of the theoretical part, we analyze the main ways of translating phraseological units with an anthroponym included. In Chapter 2 of the work, we will analyze phraseological units with an anthroponym component, taken from books of Stephen King, Terry Pratchett and Neil Gaiman, and observe what translation strategies were applied, and what linguistic and cultural trends can be observed against their background. The main conclusions, as well as practical material presented in the work, can be used in the course of English lexicology, as well as in the course of theory and practice of translation.
3

Problèmes de perception de la parole dans le bruit chez les enfants présentant un trouble de traitement auditif

Lagacé, Josée 08 1900 (has links)
Il est bien connu que les enfants qui présentent un trouble de traitement auditif (TTA) ont de la difficulté à percevoir la parole en présence de bruit de fond. Cependant, il n’existe aucun consensus quant à l’origine de ces difficultés d’écoute. Ce programme de recherche est consacré à l’étude des incapacités sous-jacentes aux problèmes de perception de la parole dans le bruit chez les enfants présentant un TTA. Le Test de Phrases dans le Bruit (TPB) a été développé afin d’examiner si les difficultés de perception de la parole dans le bruit d’enfants ayant un TTA relèvent d’incapacités auditives, d’incapacités cognitivo-linguistiques ou des deux à la fois. Il comprend cinq listes de 40 phrases, composées de 20 phrases hautement prévisibles (HP) et de 20 phrases faiblement prévisibles (FP), de même qu’un bruit de verbiage. Le niveau de connaissance du mot clé (mot final) de chaque phrase a été vérifié auprès d’un groupe d’enfants âgés entre 5 et 7 ans. De plus, le degré d’intelligibilité des phrases dans le bruit et le niveau de prévisibilité ont été mesurées auprès d’adultes pour assurer l’équivalence entre les listes. Enfin, le TPB a été testé auprès d’un groupe de 15 adultes et d’un groupe de 69 enfants sans trouble auditif avant de l’administrer à des enfants ayant un TTA. Pour répondre à l’objectif général du programme de recherche, dix enfants présentant un TTA (groupe TTA) et dix enfants jumelés selon le genre et l’âge sans difficulté auditive (groupe témoin) ont été soumis aux listes de phrases du TPB selon différentes conditions sonores. Le groupe TTA a obtenu des performances significativement plus faibles comparativement au groupe témoin à la tâche de reconnaissance du mot final des phrases présentées en même temps qu’un bruit de verbiage compétitif, aux rapports signal-sur-bruit de 0, +3 et +4 dB. La moyenne de la différence des scores obtenue entre les phrases HP et FP à chaque condition expérimentale de bruit était similaire entre les deux groupes. Ces résultats suggèrent que les enfants ayant un TTA ne se distinguent pas des enfants du groupe témoin au plan de la compétence cognitivo-linguistique. L’origine des difficultés d’écoute de la parole dans le bruit dans le cas de TTA serait de nature auditive. Toutefois, les résultats des analyses de groupe diffèrent de ceux des analyses individuelles. Les divers profils de difficultés d’écoute identifiés auprès de cette cohorte appuient l’importance de continuer les investigations afin de mieux comprendre l’origine des problèmes de perception de la parole dans le bruit dans le cas de TTA. En connaissant mieux la nature de ces difficultés, il sera possible d’identifier les stratégies d’intervention de réadaptation spécifiques et efficaces. / A hallmark listening problem of individuals presenting with Auditory Processing Disorder (APD) is their poor speech recognition in noise. The underlying cause of their difficulties in unfavourable listening conditions is unknown. The objective of this dissertation was to explore the underlying nature of the speech perception problems in noise in the case of APD. The Test de Phrases dans le Bruit (TPB) was developed to explore the underlying origins of the speech perception difficulties in noise in the case of APD, in order to identify if they are related to an auditory dysfunction, a language-based dysfunction or both. The TPB consists of five lists of 40 recorded sentences, including 20 highly predictable (HP) sentences and 20 low predictable (LP) sentences, and a speech babble. The familiarity of each sentence final key word was tested with a group of children from five to seven years old. The intelligibility in noise of the sentences and the degree of predictability were also measured with adult participants in order to obtain equivalent lists. The actual sentence list sets of the TPB have been tested with a group of 15 adults and a group of 69 children without any hearing problem before its use with children presenting with APD. To achieve the general goal of the study, ten participants identified with APD (APD group) were assessed with the TPB, as well as ten age and gender matched children with normal auditory processing functions (control group). The mean performances of the APD group were significantly lower than the ones of the control group on the TPB sentence keyword recognition in noise at the signal-to-noise ratios of 0, +3 and +4 dB. The group average of the HP and LP difference of scores was similar between the groups at each of the tested signal-to-noise ratio. These results suggest that, as a group, children with APD use linguistic contextual information when listening to speech in background noise to the same extent as the ones of the control group. According to these analyses, the underlying origin of the speech perception problems in noise in the case of APD would be related to an auditory dysfunction. However, examination of the group data analyses differed from the individual analyses. The verification of the individual patterns revealed different profiles suggesting that further substantiation of these preliminary findings is warranted. A better understanding of the listening difficulties in noise exhibited by individuals with APD should lead to specific and efficacious intervention programs.
4

The Role of Linguistic Context in the Acquisition of the Pluperfect : Polish Learners of Swedish as a Foreign Language

Zielonka, Bronisława January 2005 (has links)
<p>This work consists of two parts: the theoretical and the experimental. In the theoretical part, some general and some language specific theories of tense, aspect and aktionsart are presented, and the temporal systems of Swedish and Polish are compared. </p><p>The theoretical part is not a mere review of the literature on the subject. The comparison of the descriptions of aspect and aktionsart by Slavic researchers with the universal theory of Smith (1991) and (1977) and with description of aktionsart in Swedish in Teleman et al. (1999) has allowed me for some important observations as to the nature of the long-lasting dispute about the differences between aspect and aktionsart.</p><p>The experimental part is a cross-sectional study on the role of the linguistic context on the acquisition of the pluperfect by Polish learners Swedish as a foreign language. The informants are university students studying Swedish as a foreign language. The language samples were collected by means of two types of tests: gap-filling and translation from Polish. </p><p>Twelve linguistic factors, each divided into two subgroups, were hypothesised to have affected the correct use of the pluperfect. All those hypotheses as to which of the subgroups may inhibit and which may facilitate the correct use of the pluperfect are grounded in linguistic theories, i.e. presented in the form of linguistically-based discussions as to what kind of effect, facilitative or inhibiting, each of the linguistic factors may have had, and why. </p><p>The effect of those factors upon the correct use of the pluperfect has been tested by means of a step-wise multiple regression which measured the simultaneous effect of each factor upon the correct use of the pluperfect. This method has confirmed the facilitative effect of the following six linguistic factors: intrasentential indication of topic time (subordinate clause), unbounded verb indicating topic time, agentive meaning of the target verb, specifying subordinate clause, statal pluperfect and location of the time of action of pluperfect clause outside the temporal frame of narrative plot.</p>
5

The Role of Linguistic Context in the Acquisition of the Pluperfect : Polish Learners of Swedish as a Foreign Language

Zielonka, Bronisława January 2005 (has links)
This work consists of two parts: the theoretical and the experimental. In the theoretical part, some general and some language specific theories of tense, aspect and aktionsart are presented, and the temporal systems of Swedish and Polish are compared. The theoretical part is not a mere review of the literature on the subject. The comparison of the descriptions of aspect and aktionsart by Slavic researchers with the universal theory of Smith (1991) and (1977) and with description of aktionsart in Swedish in Teleman et al. (1999) has allowed me for some important observations as to the nature of the long-lasting dispute about the differences between aspect and aktionsart. The experimental part is a cross-sectional study on the role of the linguistic context on the acquisition of the pluperfect by Polish learners Swedish as a foreign language. The informants are university students studying Swedish as a foreign language. The language samples were collected by means of two types of tests: gap-filling and translation from Polish. Twelve linguistic factors, each divided into two subgroups, were hypothesised to have affected the correct use of the pluperfect. All those hypotheses as to which of the subgroups may inhibit and which may facilitate the correct use of the pluperfect are grounded in linguistic theories, i.e. presented in the form of linguistically-based discussions as to what kind of effect, facilitative or inhibiting, each of the linguistic factors may have had, and why. The effect of those factors upon the correct use of the pluperfect has been tested by means of a step-wise multiple regression which measured the simultaneous effect of each factor upon the correct use of the pluperfect. This method has confirmed the facilitative effect of the following six linguistic factors: intrasentential indication of topic time (subordinate clause), unbounded verb indicating topic time, agentive meaning of the target verb, specifying subordinate clause, statal pluperfect and location of the time of action of pluperfect clause outside the temporal frame of narrative plot.
6

Problèmes de perception de la parole dans le bruit chez les enfants présentant un trouble de traitement auditif

Lagacé, Josée 08 1900 (has links)
Il est bien connu que les enfants qui présentent un trouble de traitement auditif (TTA) ont de la difficulté à percevoir la parole en présence de bruit de fond. Cependant, il n’existe aucun consensus quant à l’origine de ces difficultés d’écoute. Ce programme de recherche est consacré à l’étude des incapacités sous-jacentes aux problèmes de perception de la parole dans le bruit chez les enfants présentant un TTA. Le Test de Phrases dans le Bruit (TPB) a été développé afin d’examiner si les difficultés de perception de la parole dans le bruit d’enfants ayant un TTA relèvent d’incapacités auditives, d’incapacités cognitivo-linguistiques ou des deux à la fois. Il comprend cinq listes de 40 phrases, composées de 20 phrases hautement prévisibles (HP) et de 20 phrases faiblement prévisibles (FP), de même qu’un bruit de verbiage. Le niveau de connaissance du mot clé (mot final) de chaque phrase a été vérifié auprès d’un groupe d’enfants âgés entre 5 et 7 ans. De plus, le degré d’intelligibilité des phrases dans le bruit et le niveau de prévisibilité ont été mesurées auprès d’adultes pour assurer l’équivalence entre les listes. Enfin, le TPB a été testé auprès d’un groupe de 15 adultes et d’un groupe de 69 enfants sans trouble auditif avant de l’administrer à des enfants ayant un TTA. Pour répondre à l’objectif général du programme de recherche, dix enfants présentant un TTA (groupe TTA) et dix enfants jumelés selon le genre et l’âge sans difficulté auditive (groupe témoin) ont été soumis aux listes de phrases du TPB selon différentes conditions sonores. Le groupe TTA a obtenu des performances significativement plus faibles comparativement au groupe témoin à la tâche de reconnaissance du mot final des phrases présentées en même temps qu’un bruit de verbiage compétitif, aux rapports signal-sur-bruit de 0, +3 et +4 dB. La moyenne de la différence des scores obtenue entre les phrases HP et FP à chaque condition expérimentale de bruit était similaire entre les deux groupes. Ces résultats suggèrent que les enfants ayant un TTA ne se distinguent pas des enfants du groupe témoin au plan de la compétence cognitivo-linguistique. L’origine des difficultés d’écoute de la parole dans le bruit dans le cas de TTA serait de nature auditive. Toutefois, les résultats des analyses de groupe diffèrent de ceux des analyses individuelles. Les divers profils de difficultés d’écoute identifiés auprès de cette cohorte appuient l’importance de continuer les investigations afin de mieux comprendre l’origine des problèmes de perception de la parole dans le bruit dans le cas de TTA. En connaissant mieux la nature de ces difficultés, il sera possible d’identifier les stratégies d’intervention de réadaptation spécifiques et efficaces. / A hallmark listening problem of individuals presenting with Auditory Processing Disorder (APD) is their poor speech recognition in noise. The underlying cause of their difficulties in unfavourable listening conditions is unknown. The objective of this dissertation was to explore the underlying nature of the speech perception problems in noise in the case of APD. The Test de Phrases dans le Bruit (TPB) was developed to explore the underlying origins of the speech perception difficulties in noise in the case of APD, in order to identify if they are related to an auditory dysfunction, a language-based dysfunction or both. The TPB consists of five lists of 40 recorded sentences, including 20 highly predictable (HP) sentences and 20 low predictable (LP) sentences, and a speech babble. The familiarity of each sentence final key word was tested with a group of children from five to seven years old. The intelligibility in noise of the sentences and the degree of predictability were also measured with adult participants in order to obtain equivalent lists. The actual sentence list sets of the TPB have been tested with a group of 15 adults and a group of 69 children without any hearing problem before its use with children presenting with APD. To achieve the general goal of the study, ten participants identified with APD (APD group) were assessed with the TPB, as well as ten age and gender matched children with normal auditory processing functions (control group). The mean performances of the APD group were significantly lower than the ones of the control group on the TPB sentence keyword recognition in noise at the signal-to-noise ratios of 0, +3 and +4 dB. The group average of the HP and LP difference of scores was similar between the groups at each of the tested signal-to-noise ratio. These results suggest that, as a group, children with APD use linguistic contextual information when listening to speech in background noise to the same extent as the ones of the control group. According to these analyses, the underlying origin of the speech perception problems in noise in the case of APD would be related to an auditory dysfunction. However, examination of the group data analyses differed from the individual analyses. The verification of the individual patterns revealed different profiles suggesting that further substantiation of these preliminary findings is warranted. A better understanding of the listening difficulties in noise exhibited by individuals with APD should lead to specific and efficacious intervention programs.

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