Applicability of Distortion Product Otoacoustic Emissions as a new health surveillance technique for hearing screening in industry

dc.contributor.advisorSoer, Maggi E. (Magdalena Elizabeth)en
dc.contributor.coadvisorVinck, Bart M.en
dc.contributor.emailmmoepeng2001@yahoo.co.uken
dc.contributor.postgraduateMoepeng, Meshacken
dc.date.accessioned2017-05-12T11:38:47Z
dc.date.available2017-05-12T11:38:47Z
dc.date.created2017-04-24en
dc.date.issued2016en
dc.descriptionDissertation (M Communication Pathology)--University of Pretoria, 2016.en
dc.description.abstractBackground: Distortion product otoacoustic emissions (DPOAEs) are a promising screening technique for the early detection of subtle noise induced cochlear function changes. Objectives: To determine the applicability of DPOAEs as a health surveillance technique for the early detection of noise induced hearing loss (NIHL) in workers at a steel manufacturing industry. Methods: DPOAEs were recorded in 20 participants with no history of occupational noise exposure and 20 participants exposed to noise in the steel manufacturing industry. Participants were not exposed to noise for at least 48 hours prior to testing. All participants were male with normal audiometric thresholds of ?15 dB HL. The DPOAE presence and response amplitude levels for different frequencies were compared between the two groups. The study further evaluated the short-term test-retest repeatability of DPOAE measurements, and also compared the total test duration of performing DPOAEs to the duration of screening audiometry. Results: The noise exposed group had statistically significantly lower DPOAE response amplitudes than the control group for all the tested frequencies; (p&#0600.001) at 2002 to 4004 Hz, and (p=0.01, p=0.001) at 6348 and 7996 Hz respectively, suggesting more cochlear damage in the noise exposed group due to early outer hair cell damage. DPOAEs showed very good reproducibility, and the average duration of performing a set of DPOAEs was significantly shorter (461 ± 68.2 seconds) than the duration of performing audiometry (591 ± 76.9 seconds), p&#0600.001. Conclusion: DPOAEs appeared to be a sensitive technique in detecting noise induced subtle cochlear function changes. DPOAEs could be used as a health surveillance technique for the early detection of NIHL in the steel manufacturing industry.en_ZA
dc.description.availabilityUnrestricteden
dc.description.degreeM Communication Pathologyen
dc.description.departmentSpeech-Language Pathology and Audiologyen
dc.identifier.citationMoepeng, M 2016, Applicability of Distortion Product Otoacoustic Emissions as a new health surveillance technique for hearing screening in industry, M Communication Pathology Dissertation, University of Pretoria, Pretoria, viewed yymmdd <http://hdl.handle.net/2263/60391>en
dc.identifier.otherA2017en
dc.identifier.urihttp://hdl.handle.net/2263/60391
dc.language.isoenen
dc.publisherUniversity of Pretoriaen
dc.rights© 2017 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.en
dc.subjectDistortion product otoacoustic emissionsen
dc.subjectHearing screeningen
dc.subjectHealth surveillanceen
dc.subjectNoise induced hearing lossen
dc.subjectUCTDen
dc.titleApplicability of Distortion Product Otoacoustic Emissions as a new health surveillance technique for hearing screening in industryen_ZA
dc.typeDissertationen

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