| Commentary on why laryngeal stroboscopy really works: clarifying misconceptions surrounding Talbot's law and the persistence of vision. | |
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MedLine Citation:
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PMID: 20881095 Owner: NLM Status: In-Process |
Abstract/OtherAbstract:
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PURPOSE: The purpose of this article is to clear up misconceptions that have propagated in the clinical voice literature that inappropriately cite Talbot's law (1834) and the theory of persistence of vision as the scientific principles that underlie laryngeal stroboscopy. METHOD: After initial research into Talbot's (1834) original studies, it became clear that his experiments were not designed to explain why stroboscopy works. Subsequently, a comprehensive literature search was conducted for the purpose of investigating the general principles of stroboscopic imaging from primary sources. RESULTS: Talbot made no reference to stroboscopy in designing his experiments, and the notion of persistence of vision is not applicable to stroboscopic motion. Instead, two visual phenomena play critical roles: (a) the flicker-free perception of light and (b) the perception of apparent motion. In addition, the integration of stroboscopy with video-based technology in today's voice clinic requires additional complexities to include synchronization with camera frame rates. CONCLUSIONS: References to Talbot's law and the persistence of vision are not relevant to the generation of stroboscopic images. The critical visual phenomena are the flicker-free perception of light intensity and the perception of apparent motion from sampled images. A complete understanding of how laryngeal stroboscopy works will aid in better interpreting clinical findings during voice assessment. |
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Authors:
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Daryush D Mehta; Dimitar D Deliyski; Robert E Hillman |
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Publication Detail:
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Type: Letter; Research Support, N.I.H., Extramural; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: Journal of speech, language, and hearing research : JSLHR Volume: 53 ISSN: 1558-9102 ISO Abbreviation: J. Speech Lang. Hear. Res. Publication Date: 2010 Oct |
Date Detail:
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Created Date: 2010-09-30 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 9705610 Medline TA: J Speech Lang Hear Res Country: United States |
Other Details:
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Languages: eng Pagination: 1263-7 Citation Subset: IM |
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| Grant Support | |
ID/Acronym/Agency:
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R01 DC007640/DC/NIDCD NIH HHS; T32 DC00038/DC/NIDCD NIH HHS |
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