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 38 for “"Sound localization"”.
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Mechanisms of sound localization in mammals: ageing, dynamics and adaption
… assess the differences in timing and level of sounds at the two ears in order to determine the azimuthal location of a sound source. These binaural cues play an important role in the ability of animals, including humans, to orient and communicate. Since the auditory scene is not static and the …
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Effects of hearing aid frequency-gain characteristics on sound localization
Thesis (M. Eng.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1996.
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Modeling and Evaluating Human Sound Localization in the Natural Environment
Humans locate sounds in their environment to avoid danger and identify objects of interest. In a ten-minute bike ride, a person might take note of a car approaching from behind, a tree where a bird is singing, and pedestrians walking from around a blind corner. Research on human sound localization …
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Sound localization and interaural time sensitivity with bilateral cochlear implants
… common as clinicians attempt to provide better sound-source localization and speech reception in noise for cochlear implant (CI) users. While some improvement over the abilities of monolateral implantees has been documented, bilateral performance for CI users is far from that achieved with …
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Neural correlates and mechanisms of sound localization in everyday reverberant settings
… These reflections interfere with the direct sound arriving at a listener's ears, distorting the binaural cues for sound localization. Yet, human listeners have little difficulty localizing sounds in most settings. This thesis addresses fundamental questions regarding the neural basis of sound …
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Spatial sound and sound localization on a horizontal surface for use with interactive surface (tabletop) computers
… computers?" "How does our perception of spatial sound change with these different loudspeaker configurations?" and "What panning methods should be used to maximally use the spatial localization abilities of the user(s)?" Using a custom-built tabletop computer setup, the work presented in this …
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The Effect of Motor Responses Versus Verbal Responses on Sound Localization Accuracy in Young Children with Normal Hearing
<p>Rationale. Sound localization is the ability to pinpoint the origin of a sound source within an auditory space. This ability is essential for safety, orientation, and communication. Poor sound localization abilities, especially in young children, can have a negative impact on academics and …
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Manatee Sound Localization: Performance Abilities, Interaural Level Cues, and Usage of Auditory Evoked Potential Techniques to Determine Sound Conduction Pathways
… and means by which Florida manatees determine sound source directionality. An eight-choice discrimination paradigm determined the sound localization abilities of two manatees within a 360° array of speakers. Five conditions were tested including a 3,000 and 200 ms, 95 dB, 0.2-24 kHz signal, a …
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FLY-EAR INSPIRED MINIATURE SENSOR SYSTEM FOR TWO-DIMENSIONAL SOUND SOURCE LOCALIZATION
A micro-scale sound localization sensor is developed and studied in this thesis to address the fundamental challenge of miniaturizing sound localization systems. When miniaturizing a microphone array, there is a critical size limitation at which the array will be unable to localize the sound source …
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Precise Temporal Processing in the Gerbil Auditory Brainstem
Sound localization and recognition are two important tasks of the auditory system. Both require accurate processing of temporal cues. Microsecond differences in the arrival time of a sound at the two ears (interaural time differences, ITDs) are the main cue for localizing low frequency sound …
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Localization and separation of concurrent talkers based on principles of auditory scene analysis and multi-dimensional statistical methods
… on 'statistical cocktail party processing': localization, tracking, and enhancement of voices in concurrent speech or in high levels of nonstationary noise. Key strategies are to link binaural and spectro-temporal information, to combine cues across frequency and time by a probabilistic …
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Binaural interactions in the auditory midbrain with bilateral electric stimulation of the cochlea
… to binaural cues normally important for accurate sound localization and speech reception in noise. This thesis characterizes binaural interactions in auditory neurons using a cat model of bilateral cochlear implants. Single neuron responses in the inferior colliculus (IC), the main nucleus of the …
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Characterization of a wideband monopulse piezoelectric direction finder
Sound localization has been the subject of much ongoing research in the area of beamformers and microphone arrays. Although these methods have been successful under certain conditions, the signal processing requirements needed for real-time operation are extensive. This thesis describes the …
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Microphone Array Based Sound Source Detection and Localization with Beamforming, GCC-PHAT, and Triangulation using Arduino and MATLAB
Microphone arrays are becoming popular for sound source localization (SSL). Keeping real-time applications in mind, such as search and rescue missions, military operations for gunshot detection, scream based localization, etc., it will help us understand how important sound localization is for …
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Human Perception of Aural and Visual Disparity in Virtual Environments
… of audio component disparity led to better localization performance by participant. Presence and prior experience did not have an effect on localization performance; however, a larger participant base may be needed to draw further conclusions. Increase in localization ability was observed …
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The role of short term synamptic plasticity in temporal coding of neuronal networks
… phase delays. This property is used by birds in sound localization. When there is no plasticity from the inputs, the firing rate of the neuron, depends more on input frequencies and less on phase delays between inputs. This leads to ambiguity in localizing the sound source. We derive a …
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Visual and auditory scene parsing
… regions of an image into objects and segregate sound components in a noisy environment. This thesis investigates fully-supervised and self-supervised machine learning approaches to parse visual and auditory signals, including images, videos, and audios. Visual scene parsing refers to densely …
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Alpha suppression as a neural marker of task demands in voluntary vs involuntary retrieval in older and younger adults
… between-subjects). Participants first encoded sounds, half of which were paired with pictures, the other half unpaired. EEG was then recorded as they listened to the sounds, with participants in the involuntary group performing a sound localization task, and those in the voluntary group …
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Effect of reverberation on the directional sensitivity of auditory neurons : peripheral factors
Reverberation poses a challenge for theories of sound localization due to the interaction between the direct sound and the various acoustic reflections. These reflections corrupt binaural cues available to the receiver, resulting in a degradation of directional information available in the acoustic …
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