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Transducer influence on Auditory Steady State Evoked Potentials
Dissertation (M (Communication Pathology))--University of Pretoria, 2006.
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University of Pretoria
2013
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| _version_ | 1867613538808233984 |
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| access_status_str | Open Access |
| author2 | Schmulian, Dunay Liezel |
| author_browse | Schmulian, Dunay Liezel |
| author_facet | Schmulian, Dunay Liezel |
| collection | Thesis |
| dc_rights_str_mv | © 2005, 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 | Dissertation (M (Communication Pathology))--University of Pretoria, 2006. |
| format | Thesis |
| id | oai:repository.up.ac.za:2263/22935 |
| institution | University of Pretoria (South Africa) |
| last_indexed | 2026-06-10T12:37:44.900Z |
| 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:2263/22935 Transducer influence on Auditory Steady State Evoked Potentials Schmulian, Dunay Liezel Swanepoel, De Wet Marais, Jacobus Johannes Sound field speakers Insert earphones Sound field Estimated pure tone thresholds Auditory steady state evoked potential Stimulus presentations Transducers Objective audiometry Minimum response levels UCTD Dissertation (M (Communication Pathology))--University of Pretoria, 2006. Preliminary studies have stirred the hope that sound-field stimulation through auditory steady state evoked potentials can be used to assess aided thresholds in the difficult-to-test population. Before the introduction of ASSEP into the clinical field, as a technique for the prediction of aided thresholds in the difficult-to-test population, a question arises concerning its clinical validation. The application of ASSEP through sound field stimulation, in the determination of aided thresholds and for the evaluation of amplification fittings, is dependent on the determination of unaided responses. Subsequently the estimation of unaided thresholds in the hearing impaired population is dependent on the establishment of normative data from the normal hearing population. The aim of this study was to determine the influence of insert earphones and sound field speaker presentation on threshold estimations using monotic auditory steady state evoked potentials, in a group of normal hearing adults. To achieve the aim of the study, a comparative, within-group experimental design was selected. The results of the current study indicated that the monotic single ASSEP technique under both insert earphone- and sound field conditions provided a reasonable estimation (25-35 dB HL for inset earphones; 20-33 dB HL for sound field speaker presentation) of the behavioural pure tone thresholds. The minimum response levels obtained under insert earphone conditions differed significantly from those obtained under sound field conditions for all the frequencies tested except 2 kHz (p < 0.01). Subsequently, the current study indicates that minimum response levels obtained using a specific transducer should serve as the basis of comparison with behavioural thresholds obtained under the same transducer. Therefore, behavioural pure tone thresholds obtained under insert earphone conditions will not suffice as a basis of comparison for minimum response levels obtained for the ASSEP technique under sound field conditions, and vice versa. This research endeavour concluded that the monotic ASSEP technique under both insert earphone and sound field conditions provide useful information for the estimation of frequency specific thresholds, but that the results are transducer specific and that comparison across transducers should be avoided. Speech-Language Pathology and Audiology Unrestricted 2013-09-06T14:02:23Z 2005-01-12 2013-09-06T14:02:23Z 2005-04-12 2006-01-12 2005-01-12 Dissertation Marais, J 2005, Transducer influence on Auditory Steady State Evoked Potentials, M dissertation, University of Pretoria, Pretoria, viewed yymmdd < http://hdl.handle.net/2263/22935 > http://hdl.handle.net/2263/22935 http://upetd.up.ac.za/thesis/available/etd-01122005-144151/ © 2005, 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 University of Pretoria |
| spellingShingle | Sound field speakers Insert earphones Sound field Estimated pure tone thresholds Auditory steady state evoked potential Stimulus presentations Transducers Objective audiometry Minimum response levels UCTD Transducer influence on Auditory Steady State Evoked Potentials |
| title | Transducer influence on Auditory Steady State Evoked Potentials |
| title_full | Transducer influence on Auditory Steady State Evoked Potentials |
| title_fullStr | Transducer influence on Auditory Steady State Evoked Potentials |
| title_full_unstemmed | Transducer influence on Auditory Steady State Evoked Potentials |
| title_short | Transducer influence on Auditory Steady State Evoked Potentials |
| title_sort | transducer influence on auditory steady state evoked potentials |
| topic | Sound field speakers Insert earphones Sound field Estimated pure tone thresholds Auditory steady state evoked potential Stimulus presentations Transducers Objective audiometry Minimum response levels UCTD |
| url | http://hdl.handle.net/2263/22935 http://upetd.up.ac.za/thesis/available/etd-01122005-144151/ |