| The acoustic reflex at a 1000 Hz probe frequency: phasor and vector analysis. | |
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MedLine Citation:
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PMID: 8928039 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Phasor plots of reflex growth functions have been inconclusive concerning the effect of the reflex for mass dominated ears. The present study aimed to establish whether vector plots clarified the effects of the reflex for phasors not showing a clear circular shape. Measured admittance data (ipsilateral reflexes across a wide intensity range) was represented as both phasor diagrams and converted to impedance quantities, represented as vectors. The results analysed for 34 ears showed few unclassifiable phasor diagrams. In addition, all growth functions showed increased stiffness on vector analysis. Resistance changes appeared to be variable. The results suggest that vector diagrams may be a useful way of representing data that is not clearly represented via phasor diagrams. The current study, however, does not clarify the pattern for mass dominated ears. |
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Authors:
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J Ferguson; L Reynolds |
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Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: The South African journal of communication disorders. Die Suid-Afrikaanse tydskrif vir Kommunikasieafwykings Volume: 42 ISSN: 0379-8046 ISO Abbreviation: S Afr J Commun Disord Publication Date: 1995 |
Date Detail:
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Created Date: 1996-10-30 Completed Date: 1996-10-30 Revised Date: 2008-02-12 |
Medline Journal Info:
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Nlm Unique ID: 7805099 Medline TA: S Afr J Commun Disord Country: SOUTH AFRICA |
Other Details:
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Languages: eng Pagination: 29-34 Citation Subset: IM |
Affiliation:
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Department of Logopaedics, University of Cape Town. |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Adolescent Adult Auditory Threshold / physiology Hearing / physiology* Humans Reflex, Acoustic* |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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