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 15 of 15 for “"Just Noticeable Difference."”.
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Exploring the Impacts of Aspect Ratios on Visual Perception in Scatterplots
… for detecting correlation. In addition, the JND (Just Noticeable Difference) was used in evaluating the visual perception of scatterplots in this experiment. The findings of this study have important implications for the design of scatterplots in data visualization, as well as for future research …
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What Properties Drive Differences in Visual Processing between Real Objects and Images?
… such as shadows as the responsible party for the differences between formats. To test these theories, participants performed in a visuomotor task measuring grip aperture and just noticeable difference with different size stimuli in a real world, image, and object condition. While findings did not …
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Modelling image quality for automotive display technologies
… to automotive applications is given and the difference between readability and perceived image quality is explained. The methodology chosen to investigate perceived image quality is the Image-Quality-Circle framework by Engeldrum (2000). Engeldrum states that observers form their image …
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Programmable MIDI Instrument Controller Design: The No Strings Attached Hammer Dulcimer
… optionally outputs the partials tones with the just noticeable difference (JND) tolerances described in psychoacoustic research. This feature allows the designer to experiment with the timbre of the fundamental tome. The controller interface succeeds in capturing the gestural movements and …
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The Effects of Circular Singer Gestures on Acoustic and Perceptual Measures of Middle School and High School Choral Singing
… effect; (b) entire spectrum grand mean and range differences between gestures comparisons indicate twelve pairings of more than 1 dB difference (Just Noticeable Difference); (c) more than half of the singer participants noticed differences in overall choral sound while using the high circular arm …
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Statistical Spectral Parameter Estimation of Acoustic Signals with Applications to Byzantine Music
… experiments were used to determine the aural just noticeable difference (jnd) in pitch and deduce patterns utilized to customize acceptable performable pitch deviation to the application at hand. These customizations [Acceptable Performance Difference (a new measure of frequency differential …
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A high accuracy nonlinear model of the human cochlea
… membrane compression curve and the intensity just-noticeable-difference. The result is an efficient multi-rate system which can be easily reconfigured based on the needs of the application. Preliminary tests of the model show that it is capable of reproducing documented psychoacoustical …
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Aspect of image quality and the Internet
… that can be reproduced with perceptible colour differences. It is shown that a 24-bit depth image displayed under the 8-bit depth setting of a graphics card adapter results in lower colour differences than the 216 colour image displayed under the same bit depth setting. The standard RGB colour …
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A Thousand Bells: Acoustical implementation of bell spectra using the finite element method and its compositional realization
… profiles of optimal bell tone colors based upon just tuning ratios. In this chapter, I discuss how the concepts of consonance and Just Noticeable Difference in psychoacoustics are applied to use the 96 tone equal temperament tuning system for bell harmonic profiles. The third chapter includes the …
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The auditory fingerprint : multidimensional characterization of individual pitch perception in musicians
… reported to show remarkable inter-individual differences in elementary hearing functions, sound perception mode, musical instrument preference, performance style, as well as musical abilities such as absolute- and relative pitch perception or auditory imagery (audiation). However, relevant …
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Joint Torque Feedback for Motion Training with an Elbow Exoskeleton
Joint torque feedback (JTF) is a new and promising means of kinesthetic feedback to provide information to a person or guide them during a motion task. However, little work has been done to apply the torque feedback to a person. This project evaluates the properties of JTF as haptic feedback, …
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Motion cueing in driving simulators for research applications
… measures of driver performance. Using a Just Noticeable Difference methodology, Stage 1 determined the maximum perceptible motion scaling for platform movement in both translation and tilt. Motion cues scaled by 90% or more could not be perceptibly differentiated from unscaled motion. …
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Negative masking and the units problem in audition
… have attempted to explicitly define the just-noticeable difference (JND) for loudness: the smallest amount, in physical units, that a stimulus needs to be increased to produce a perceptual difference. A review of the literature suggests that the problem in defining the JND is twofold. …
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High-resolution spatio-temporal quantification of fish predator-prey interactions over ecosystem scales with multispectral underwater sensing and optimality of human visual perception with natural daylight
… near fish swimbladder resonance where the large differences across fish species are discernible. Such synoptic imaging at areal rates roughly 10^4 to 10^6 times greater than conventional methods may lead to more stable prediction of key ecosystem processes and has broad applications in remotely …
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The effects of proprioceptive training and dyad practice to improve sensorimotor function
… after the end of training (retention), using the Just-noticeable-difference (JND) threshold and Uncertainty. Results - Aim 2: MPS did not differ between groups at baseline. All groups revealed significant motor performance gains by the end of training. However, dyads outperformed the other groups …