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Proceedings Paper

Measuring the motion of the human tympanic membrane by laser Doppler vibrometry: basic principles and technical aspects
Author(s): Hans-Jochen Foth; Christian Huthoff; Norbert Stasche M.D.; Karl Hoermann M.D.
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Paper Abstract

Under hearing conditions, the amplitude of the motion of the human tympanic membrane is in the range of several tens of nanometers. To measure motions of this size by a touchfree method is a domain of laser technology. Here laser-Doppler-vibrometry was chosen because of its sensitivity in detecting small amplitudes and the clear information about the detected point on the tympanic membrane. Care was taken to develop the method for a clinically acceptable procedure for hearing diagnosis. The first realization by sinus wave excitation was found to be very time consuming. A measuring time of less than a minute was obtained by white noise excitation, fast Fourier transformation and choosing the umbo as the detection point. Meanwhile the setup is used for in vivo measurements.

Paper Details

Date Published: 1 February 1994
PDF: 13 pages
Proc. SPIE 2083, Microscopy, Holography, and Interferometry in Biomedicine, (1 February 1994); doi: 10.1117/12.167418
Show Author Affiliations
Hans-Jochen Foth, Univ. of Kaiserslautern (Germany)
Christian Huthoff, Univ. of Kaiserslautern (Germany)
Norbert Stasche M.D., Klinikum of Kaiserslautern (Germany)
Karl Hoermann M.D., Klinikum of Kaiserslautern (Germany)

Published in SPIE Proceedings Vol. 2083:
Microscopy, Holography, and Interferometry in Biomedicine
Adolf Friedrich Fercher; Aaron Lewis; Halina Podbielska M.D.; Herbert Schneckenburger; Tony Wilson, Editor(s)

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