Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 163 for “"Speech perception"”.
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Units of Speech Perception
Made available in DSpace on 2014-12-10T21:07:25Z (GMT). No. of bitstreams: 1 7212422.pdf: 5198117 bytes, checksum: 4efbca170c767992b3ef04e32d5549d2 (MD5) Previous issue date: 1971
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Speech perception in virtual environments
… software or training simulations make use of speech to convey important information to the user. These applications typically present a combination of background music, sound effects, ambient sounds and dialog simultaneously to create a rich auditory environment. Since interactive virtual …
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Cognitive resources in audiovisual speech perception
… with correlated information, and audiovisual speech perception is a familiar instance of multisensory integration. Several approaches will be used to further examine the role of cognitive factors on audiovisual speech perception. The main focuses of this thesis will be to examine the …
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Speech perception in a sparse domain
… to be efficient for processing natural images or speech. The common characteristics between natural images and speech are that they are both highly structured, therefore having much redundancy. Our perceptual system may use redundancy reduction and sparse coding strategies to deal with complex …
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The neural basis of speech perception
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Brain and Cognitive Sciences, 1995.
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The Neural Substrates of Multisensory Speech Perception
<p>Comprehending speech is one of the most important human behaviors, but we are only beginning to understand how the brain accomplishes this difficult task. One key to speech perception seems to be that the brain integrates the independent sources of information available in the auditory and …
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Speech perception in children with reading disabilities
… after hearing it. All of the natural CV and VC speech syllables used in both tasks were taken from a commercial database of 18 talkers. Experimental results were: First, regardless of pure tone hearing ability and higher language processing ability (at the level of words and sentences), children …
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Neural Correlates of Auditory -Visual Speech Perception in Noise
Speech perception in noise may be facilitated by presenting the concurrent optic stimulus of observable speech gestures. Objective measures such as event-related potentials (ERPs) are crucial to understanding the processes underlying a facilitation of auditory-visual speech perception. Previous …
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Sources and Correlates of Performance Enhancement in Audiovisual Speech Perception
In a noisy environment, speech intelligibility is greatly enhanced by seeing the speaker’s face. This enhancement results from the integration of auditory and visual signals, but the underlying mechanisms remain largely unknown. This thesis describes the results from four studies investigating the …
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Perceptions of Parisian French: From Language Attitudes to Speech Perception
… much more by cities' reputations than by perceptions of their residential desirability. Subjects' mental maps of the Parisian region were indicated to be constrained by subjects' age, gender, socio-economic status and level of anti-immigrant bias. A subsequent study demonstrated that such …
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Immediate transfer of learning from speech perception to speech production
… through listening experience affect later perception (Onishi et al., 2002), and speech production errors reflect constraints present in recently spoken syllables (Dell et al., 2000). There is little evidence, however, that such phonotactic learning can transfer between perception and …
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Optimization under ecological realism reproduces signatures of human speech perception
… in machine learning have made real-world perception tasks feasible for computers, in many cases approaching levels of performance similar to those of humans. In particular, optimizing models for ecologically realistic training datasets has helped to yield more human-like model results. In …
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Neural Correlates of Audiovisual Speech Perception In Aphasia and Healthy Aging
<p>Understanding speech in face-to-face conversation utilizes the integration of multiple pieces of information, most importantly the auditory vocal sounds and visual lip movements. Prior studies of the neural underpinnings of audiovisual integration in the brain have provided converging evidence …
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A theory of speech perception in normal and hearing-impaired ears
… the longstanding problem of understanding human speech perception. We aim to study speech perception and decode perceptual cues in speech by conducting psychoacoustic experiments on several subjects by presenting them with nonsense consonant-vowel (CV) syllables in various kinds of masking noise …
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Masking effects of perceptual cues on hearing-impaired ears for speech perception
Made available in DSpace on 2019-08-23T20:35:43Z (GMT). No. of bitstreams: 2 GUO-THESIS-2019.pdf: 1675278 bytes, checksum: fd32a53717e6038243e75bd42c445267 (MD5) LICENSE.txt: 4206 bytes, checksum: c6d48ca9d6e46da3cfc1d9bb92c35617 (MD5) Previous issue date: 2019-03-27
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FMRI studies of effects of hearing status on audio-visual speech perception
… neurological processes of visual influences on speech perception and to investigate effects of hearing status on AV speech perception. More specifically, functional magnetic resonance imaging (fMRI) was used to investigate the brain activity underlying audio-visual speech perception in three …
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Investigating The Neural Basis of Audiovisual Speech Perception With Intracranial Recordings In Humans
<p>Speech is inherently multisensory, containing auditory information from the voice and visual information from the mouth movements of the talker. Hearing the voice is usually sufficient to understand speech, however in noisy environments or when audition is impaired due to aging or disabilities, …
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Sensory and cognitive contributions to speech perception in background noise in young adults
In the present study, speech perception in background noise was investigated by asking participants to perform listening tasks in two target speech contexts. Each target speech context was presented in four listening environments. External factors within each listening environment were manipulated, …
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Effects of NAL-R amplification on consonant speech perception in hearing-impaired listeners
This thesis investigates speech perception in hearing impaired (HI ) subjects. Psychoacoustic experiments in different conditions were undertaken. In particular, two consonant vowel (CV ) identification experiments in masking noise were conducted at various signal-to-noise ratios (SNRs) with 16 HI …
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