Measuring the motion of the human tympanic membrane by laser Doppler vibrometry: basic principles and technical aspects

Hans-Jochen Foth; Christian Huthoff; Norbert Stasche M.D.; Karl Hoermann M.D.

doi:10.1117/12.167418

1 February 1994 Measuring the motion of the human tympanic membrane by laser Doppler vibrometry: basic principles and technical aspects

Hans-Jochen Foth, Christian Huthoff, Norbert Stasche M.D., Karl Hoermann M.D.

Author Affiliations +

Proceedings Volume 2083, Microscopy, Holography, and Interferometry in Biomedicine; (1994) https://doi.org/10.1117/12.167418
Event: Europto Biomedical Optics '93, 1993, Budapest, Hungary

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.

Citation Download Citation

Hans-Jochen Foth, Christian Huthoff, Norbert Stasche M.D., and Karl Hoermann M.D. "Measuring the motion of the human tympanic membrane by laser Doppler vibrometry: basic principles and technical aspects", Proc. SPIE 2083, Microscopy, Holography, and Interferometry in Biomedicine, (1 February 1994); https://doi.org/10.1117/12.167418

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