Browsing Theses and Dissertations (University of Pretoria) by Supervisor "Hanekom, J.J. (Johannes Jurgens)"
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Browsing Theses and Dissertations (University of Pretoria) by Supervisor "Hanekom, J.J. (Johannes Jurgens)"
Now showing items 1-20 of 22
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(University of Pretoria, 2008-08-19)High levels of speech recognition have been obtained with cochlear implant users in quiet conditions. In noisy environments, speech recognition deteriorates considerably, especially in speech-like noise. The aim of this ...
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(University of Pretoria, 2010)Acoustic models are useful tools to increase understanding of cochlear implant perception. Two particular issues in modelling cochlear implant perception were considered in the present study, which aimed at improving ...
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(University of Pretoria, 2019)Post-implantation facial nerve stimulation is a common side-effect of cochlear electrical stimulation. Facial nerve stimulation can often be resolved through adjustments in speech processor fitting but, in some instances, ...
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(University of Pretoria, 2007-01-24)A cochlear implant is a prosthetic device that can provide severe-to-profoundly deaf individuals with partially restored hearing. It emulates the function of a normal cochlea through combined functioning of externally ...
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(University of Pretoria, 2012-08-14)Speech processing in the human cochlea introduces travelling waves on the basilar membrane. These travelling waves have largely been ignored in most processing strategies. This study implements a hydrodynamical model in ...
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(University of Pretoria, 2009-05-15)This study investigates the signal processing required in order to allow for the evaluation of hearing perception prediction models at low signal-to-noise Ratios (SNR). It focusses on speech enhancement and the estimation ...
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(University of Pretoria, 2009)Cochlear implants are electronic devices intended for restoring hearing to the profoundly deaf. Unfortunately the degree of restored hearing varies greatly between subjects. To investigate some of the mechanisms that ...
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(University of Pretoria, 2008-12-19)Speech audiometry is considered an essential tool in the assessment of hearing, not only to validate pure tone measurements, but also to indicate speech perception as a critical communicative function. The use of sentence ...
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(University of Pretoria, 2006-06-13)Using a Kalman filter that contains a forward-predictive model of a relevant system, to predict the states of that system by means of an analysis-by-synthesis implementation in order to evade significant time delays incurred ...
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(University of Pretoria, 2010-10-02)This study determined whether the Hodgkin-Huxley model for unmyelinated nerve fibres could be more comprehensively modified to predict excitation behaviour at Ranvier nodes of a human sensory nerve fibre, as specifically ...
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(University of Pretoria, 2010-10-08)Music perception in cochlear implant (CI) listeners has been found to be generally unsatisfactory. An improved understanding of music perception in CIs is thus required, where research into the perception of timbre, an ...
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(University of Pretoria, 2011)Read abstract in the document
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(2012)The degree of hearing restoration provided by the cochlear implant is prone to inter-subject variance. The objective of this study is to account for some of the factors influencing this through a subject-specific model ...
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(University of Pretoria, 2015)Cochlear implants have successfully been used to enable hundreds of thousands of profoundly deaf people to regain some perception of hearing. Hearing performance does, however, vary greatly among individual implant users. ...
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(University of Pretoria, 2006-06-14)Visual target acquisition is performed during several daily tasks, often requmng time¬dependent behavioural responses towards stimuli. Information processing during such tasks is subject to bottom-up as well top-down ...
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(University of Pretoria, 2009-06-18)The goal of this study was to investigate the methodology in designing a vowel intelligibility model that can objectively predict the outcome of a vowel confusion test performed with normal hearing individuals listening ...
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(University of Pretoria, 2014)Recipients of present-day cochlear implants (CIs) display remarkable success with speech recognition in quiet, but not with speech recognition in noise. Normal-hearing (NH) listeners, in contrast, perform relatively well ...
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(University of Pretoria, 2008-10-01)The value of studying elephant vocalizations lies in the abundant information that can be retrieved from it. Recordings of elephant rumbles can be used by researchers to determine the size and composition of the herd, the ...
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(University of Pretoria, 2011)Cochlear implant (CI) devices afford many profoundly deaf individuals worldwide partially restored hearing ability. Although CI users achieve remarkable speech perception with contemporary multichannel CI devices, their ...
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(University of Pretoria, 2012-02-29)To advance the understanding of electric hearing, from both a theoretical and practical perspective, the present study employs an engineering approach to examine whether a fundamental stochastic link exists between neural ...
Now showing items 1-20 of 22