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 18 of 18 for “"perception of sound"”.
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On the Simultaneous Perception of Sound and Three-Dimensional Objects
Although examples of work investigating the perceptual relationship and possibilities of sound and image are common, relatively litle work has been carried out into multimedia works combining sound and three-dimensional objects. A practice-based investigation into this subject is presented with …
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Relative distance perception of sound sources in critical listening environment via binaural reproduction
… distance cues are important in the degree of realism provided by virtual audio systems. In the last decade there has been an increased interest in this research area. The main focus of this research project is to investigate the effect of different acoustic cues related to distance …
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The effects of on-screen messages on viewer perceptions of source credibility and issue valence
<p>The present study investigates the effects of on-screen messages on viewer perceptions of source credibility and issue valence. Previous research has found that elites utilize framing in order to alter viewer perceptions and change public opinion. An experiment was conducted, which examined …
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Cellular Signaling in Development of the Cochlear Tonotopic Gradient
<p>The accurate perception of sound frequency by a vertebrate results from tuning of hair cells, which are arranged along the auditory organ according to their preferred frequencies. This arrangement is termed a tonotopic gradient. The tuning results from coordination of many cellular and …
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A distortion product otoacoustic emissions (DPOAE) assessment of cochlear function in tinnitus subjects with normal hearing sensitivity
Tinnitus, the perception of sound in the absence of an external acoustic source, disrupts the daily life of 1 out of every 200 adults, yet its physiological basis remains largely a mystery. While tinnitus and hearing loss (i.e., elevated pure tone thresholds) commonly co-occur, many people without …
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Neural abnormalities underlying tinnitus and hyperacusis
Tinnitus, the ongoing perception of sound in the absence of a physical stimulus, and hyperacusis, the intolerance of sound intensities considered comfortable by most people, are two often co-occurring clinical conditions lacking effective treatments. This thesis identified neural correlates of …
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Transfer Properties of the Hair Cell-Afferent Fiber Synapse
<p>The perception of sound is initiated in the inner ear by the conversion of vibrational energy into a neural code, a transduction process achieved by the chemical synapses of hair cells in the auditory periphery. Thus, the operation of the hair cell's presynaptic active zone is key to …
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Perceived Similarity Between Complex Sounds: The Contribution Of Acoustic, Descriptive And Categorical Features
The thesis identifies some of the most salient acoustic and descriptive features employed in listeners' representations of sounds focussing on similarity judgements. A range of descriptive data (including word pair and imagery/word use) was collected alongside acoustic measures for the sound …
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Optimal Algorithms for Blind Source Separation - Application to Acoustic Echo Cancellation
We are all familiar with the sound which can be viewed as a wave motion in air or other elastic media. In this case, sound is a stimulus. Sound can also be viewed as an excitation of the hearing mechanism that results in the perception of sound. The interaction between the physical properties of …
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Audioptimization : global-based acoustic design
… design is a difficult problem, because the human perception of sound depends on such things as decibel level, direction of propagation, and attenuation over time, none of which are tangible or visible. The advent of computer simulation and visualization techniques for acoustic design and analysis …
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Effect of dynamic range compression on attending to sounds based on spatial location
… to accommodate the reduced dynamic range that often accompanies hearing loss. Unfortunately, when applied independently at either ear, this gain can introduce fluctuations in interaural level difference (ILD), which is an important cue for spatial perception and attending to sounds in an …
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FOURTH SPACE: Sonic & /aural dimensions of Cape Town's historic urban landscape
Focusing on the urban enclave of Cape Town, informally known as the City Bowl, this thesis examines the significance of historic city soundscapes that give shape to its urban heritage. At the levels of international, national, and local governance and in policy documentation, little attention is …
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Using Phoneme Groups to Train Deep Learning Models to Remove Reverberation in Cochlear Implant Stimulus Patterns
… (CI) is a medical device that aims to restore sound perception and speech intelligibility to individuals with profound sensorineural hearing loss. CIs mimic the function of the auditory system by transforming an acoustic signal into a sequence of electrical pulses that stimulate the auditory …
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Classification of tinnitus versus non-tinnitus hearing impaired subject fMRI data
Diagnosis of tinnitus, the perception of sound minus external stimulus, depends on self-report and there is currently no objective way to determine if a person has the disorder. Previous examinations of resting-state brain scan data combined with a priori knowledge in the form of suspect regions …
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Collaborative audiological and psychological intervention where tinnitus and hearing loss co-exist
Tinnitus is the perception of sound in the absence of an external sound source and is estimated to be experienced by 10-15% of the population. The majority of tinnitus patients present with some form of hearing loss and intervention aimed at reducing the effects of auditory pathology is indicated …
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Spaces of the Ear: Literature, Media, and the Science of Sound, 1870-1930
Spaces of the Ear examines the concomitant emergence of new forms of acoustical embodiment across the diverse fields of literature and science in the historical period beginning with the Franco-Prussian War and ending with the introduction of early information theory in the late 1920s. In …
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Effects of Earplug Material, Insertion Depth, and Measurement Technique on Hearing Occlusion Effect
Occlusion effects result from amplification of low frequency components of body- transmitted sound when the ear canal is occluded with hearing protection devices, hearing aids, or other canal-sealing inserts. Since the occlusion effect will enhance the hearing of bodily- generated sounds and result …
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Characterization of the head-related transfer function using chirp and maximum length sequence excitation signals
… signals are used to obtain measurements of the head-related transfer function (HRTF) for the Knowles electronic manikin for acoustic research (KEMAR), resulting in remarkably low relative error between the two measurement methods. Due to the low relative error, it is asserted that …