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5 September 2014 Full-field transient vibrometry of the human tympanic membrane by local phase correlation and high-speed holography
Ivo Dobrev, Cosme Furlong, Jeffrey T. Cheng, John Rosowski
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Journal of Biomedical Optics, Vol. 19, Issue 9, 096001 (September 2014). https://doi.org/10.1117/1.JBO.19.9.096001
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.
CC BY: © The Authors. Published by SPIE under a Creative Commons Attribution 4.0 Unported License. Distribution or reproduction of this work in whole or in part requires full attribution of the original publication, including its DOI.
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Ivo Dobrev, Cosme Furlong, Jeffrey T. Cheng, and John Rosowski "Full-field transient vibrometry of the human tympanic membrane by local phase correlation and high-speed holography," Journal of Biomedical Optics 19(9), 096001 (5 September 2014). https://doi.org/10.1117/1.JBO.19.9.096001
Published: 5 September 2014
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Cited by 23 scholarly publications.
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KEYWORDS
Acoustics
Laser Doppler velocimetry
Ferroelectric materials
Holography
Vibrometry
Cameras
Phase shifts
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