| Otoacoustic emissions in neonates measured with different acquisition protocols. | |
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MedLine Citation:
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PMID: 22266169 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
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OBJECTIVE: The purpose of the study was to investigate the properties of neonatal transiently evoked otoacoustic emissions (TEOAEs) recorded with three most popular stimulation protocols. Differences between the recorded TEOAEs with and without spontaneous otoacoustic emissions (SOAEs), were also assessed. In addition two more issues were addressed: (i) the effect of windowing on the TEOAE responses; and (ii) the contribution of the TEOAE segment from 12.5 to 20ms to the overall TEOAE response. METHODS: TEOAEs and SOAEs were recorded from 50 normal hearing neonates using linear, non-linear, QuickScreen and standard synchronized SOAE stimulation protocols. Global and half-octave-band values of TEOAE reproducibility and response level were used to assess statistical differences in the recorded responses. Furthermore protocol differences were evaluated in different recording windows from 2.5 to 12.5 and 12 to 20ms. RESULTS: Data from the linear protocol presented TEOAE parameters with the highest values. The differences between recordings with longer and shorter acquisition windows were especially apparent in 1-1.4kHz frequency range. Furthermore the data have shown that the low frequency TEOAE components are a significant part of the TEOAE response, especially in ears without SOAEs. CONCLUSIONS: The results suggest that TEOAE protocols using short recording windows (i.e. QuickScreen) can be used only for a fast detection of a valid TEOAE. For more sophisticated clinical analyses the standard 20ms TEOAE recording window is more appropriate. The presence of SOAEs significantly influences TEOAEs. Ears with SOAEs presented higher values of TEOAE parameters especially in the 2-4kHz range. On the other hand, in the ears without SOAEs low frequency components contribute more to the signal. |
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Authors:
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W Wiktor Jedrzejczak; Stavros Hatzopoulos; Lech Sliwa; Edyta Pilka; Krzysztof Kochanek; Henryk Skarzynski |
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Publication Detail:
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Type: JOURNAL ARTICLE Date: 2012-1-20 |
Journal Detail:
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Title: International journal of pediatric otorhinolaryngology Volume: - ISSN: 1872-8464 ISO Abbreviation: - Publication Date: 2012 Jan |
Date Detail:
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Created Date: 2012-1-23 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 8003603 Medline TA: Int J Pediatr Otorhinolaryngol Country: - |
Other Details:
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Languages: ENG Pagination: - Citation Subset: - |
Copyright Information:
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Copyright © 2011 Elsevier Ireland Ltd. All rights reserved. |
Affiliation:
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Institute of Physiology and Pathology of Hearing, ul. Zgrupowania AK Kampinos 1, 01-943 Warszawa, Poland. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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