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Systematic investigation of factors contributing to music perception by cochlear implant users
Thesis (PhD)--University of Pretoria, 2011.
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University of Pretoria
2013
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| _version_ | 1867613708003311616 |
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| access_status_str | Open Access |
| author2 | Hanekom, J.J. (Johannes Jurgens) |
| author_browse | Hanekom, J.J. (Johannes Jurgens) |
| author_facet | Hanekom, J.J. (Johannes Jurgens) |
| collection | Thesis |
| dc_rights_str_mv | © 2011 University of Pretoria. All rights reserved. The copyright in this work vests in the University of Pretoria. No part of this work may be reproduced or transmitted in any form or by any means, without the prior written permission of the University of Pretoria |
| description | Thesis (PhD)--University of Pretoria, 2011. |
| format | Thesis |
| id | oai:repository.up.ac.za:2263/30682 |
| institution | University of Pretoria (South Africa) |
| last_indexed | 2026-06-10T12:40:26.265Z |
| license_str | Other — see source repository |
| provenance_str_mv | Harvested via OAI-PMH from UPSpace — University of Pretoria Institutional Repository |
| publishDate | 2013 |
| publishDateRange | 2013 |
| publishDateSort | 2013 |
| publisher | University of Pretoria |
| publisherStr | University of Pretoria |
| record_format | dspace |
| source_str | UPSpace — University of Pretoria Institutional Repository |
| spelling | oai:repository.up.ac.za:2263/30682 Systematic investigation of factors contributing to music perception by cochlear implant users Hanekom, J.J. (Johannes Jurgens) linda.pretorius@gmail.com Pretorius, Linda Luise Neurocognition Music perception Loudness balancing Sound field Cochlear implants Frequency discrimination Psychoacoustic Rhythm perception Pitch perception Melody perception UCTD Thesis (PhD)--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 music perception ability is generally unsatisfactory. Improved CI-mediated music perception ability requires that the underlying constraints hindering processing of music-relevant information need to be identified and understood. This study puts forward a systematic approach, informed by the neurocognitive mechanisms underlying music perception in normal hearing (NH), for investigating implant-mediated music perception. Psychoacoustical experiments were used to explore the extent to which music-relevant information delivered to the central auditory system following peripheral electrical stimulation supports music perception. Task-specific stimuli and test procedures were developed to assess perception of pitch, rhythm and loudness information, both as separate and in combined form, in sound-field listening conditions. CI users’ unsuccessful judgement of the musical character of short, novel single-voice melodies suggests that insufficient information reaches the central auditory processing system to effect a unified musical percept. This is despite sound field frequency discrimination behaviour being better than had been expected and rhythm perception ability with regard to short tone sequences of varying pitch and rhythmic complexity being comparable to that of NH listeners. CI listeners also performed similarly to NH listeners during pitch-dependent loudness perception tasks. Within the framework of a hierarchical, modular processing system underlying music perception, it appears that early pitch processing deficits propagate throughout the music processing system to exert an overriding inhibitory perceptual effect. The outcomes of this study not only underline the importance of delivering sufficient pitch information to the electrically stimulated auditory system but also show that music perception in CI-mediated hearing should be investigated and understood as the outcome of an integrated perceptual system. Electrical, Electronic and Computer Engineering Unrestricted 2013-09-09T07:24:00Z 2013-03-12 2013-09-09T07:24:00Z 2011-04-06 2011 2013-03-11 Thesis Pretorius, LL 2011, Systematic investigation of factors contributing to music perception by cochlear implant users, PhD thesis, University of Pretoria, Pretoria, viewed yymmdd < http://upetd.up.ac.za/thesis/available/etd-03112013-164214 / > B11/84/gm http://hdl.handle.net/2263/30682 http://upetd.up.ac.za/thesis/available/etd-03112013-164214/ © 2011 University of Pretoria. All rights reserved. The copyright in this work vests in the University of Pretoria. No part of this work may be reproduced or transmitted in any form or by any means, without the prior written permission of the University of Pretoria application/pdf application/pdf application/pdf application/pdf application/pdf University of Pretoria |
| spellingShingle | Neurocognition Music perception Loudness balancing Sound field Cochlear implants Frequency discrimination Psychoacoustic Rhythm perception Pitch perception Melody perception UCTD Systematic investigation of factors contributing to music perception by cochlear implant users |
| title | Systematic investigation of factors contributing to music perception by cochlear implant users |
| title_full | Systematic investigation of factors contributing to music perception by cochlear implant users |
| title_fullStr | Systematic investigation of factors contributing to music perception by cochlear implant users |
| title_full_unstemmed | Systematic investigation of factors contributing to music perception by cochlear implant users |
| title_short | Systematic investigation of factors contributing to music perception by cochlear implant users |
| title_sort | systematic investigation of factors contributing to music perception by cochlear implant users |
| topic | Neurocognition Music perception Loudness balancing Sound field Cochlear implants Frequency discrimination Psychoacoustic Rhythm perception Pitch perception Melody perception UCTD |
| url | http://hdl.handle.net/2263/30682 http://upetd.up.ac.za/thesis/available/etd-03112013-164214/ |