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Journal of Biomedical Optics • Open Access

Full-field transient vibrometry of the human tympanic membrane by local phase correlation and high-speed holography
Author(s): Ivo Dobrev; Cosme Furlong; Jeffrey T. Cheng; John Rosowski

Paper Abstract

Understanding the human hearing process would be helped by quantification of the transient mechanical response of the human ear, including the human tympanic membrane (TM or eardrum). We propose a new hybrid high-speed holographic system (HHS) for acquisition and quantification of the full-field nanometer transient (i.e., <10  kHz ) displacement of the human TM. We have optimized and implemented a 2+1 frame local correlation (LC) based phase sampling method in combination with a high-speed (i.e., <;40  K fps ) camera acquisition system. To our knowledge, there is currently no existing system that provides such capabilities for the study of the human TM. The LC sampling method has a displacement difference of <11  nm relative to measurements obtained by a four-phase step algorithm. Comparisons between our high-speed acquisition system and a laser Doppler vibrometer indicate differences of <10  μs . The high temporal (i.e., <40  kHz ) and spatial (i.e., <100  k data points) resolution of our HHS enables parallel measurements of all points on the surface of the TM, which allows quantification of spatially dependent motion parameters, such as modal frequencies and acoustic delays. Such capabilities could allow inferring local material properties across the surface of the TM.

Paper Details

Date Published: 5 September 2014
PDF: 12 pages
J. Biomed. Opt. 19(9) 096001 doi: 10.1117/1.JBO.19.9.096001
Published in: Journal of Biomedical Optics Volume 19, Issue 9
Show Author Affiliations
Ivo Dobrev, Worcester Polytechnic Institute (United States)
Cosme Furlong, Worcester Polytechnic Institute (United States)
Massachusetts Eye and Ear Infirmary (United States)
Harvard Medical School (United States)
Jeffrey T. Cheng, Massachusetts Eye and Ear Infirmary (United States)
Harvard Medical School (United States)
John Rosowski, Massachusetts Eye and Ear Infirmary (United States)
Harvard Medical School (United States)


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