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Proceedings Paper

Possibility to distinguish between translational and vibrational modes with two laser Doppler vibrometers and concept for use for hearing diagnosis
Author(s): Hans-Jochen Foth; Ralf Kretner
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Paper Abstract

Whereas laser doppler vibrometry is used widely in technical fields, their application for clinical diagnosis seems to be limited. Although several technical problems could be solved and the reproducibility of the technique appears to be high enough, the individual variations of the recorded signals between different persons is quite large. The complexity of the motions of the middle ear bones with frequency dependent superpositions of translational and rotational modes is seen as chance for a yield of information about middle ear diseases. A new concept is presented which relays on tow laser beams guided under different angle onto the same spot on the tympanic membrane to determine between the different kinds of motions. The theoretical and basis and first experimental test are described to evaluate the reliability of this concept.

Paper Details

Date Published: 1 June 1998
PDF: 10 pages
Proc. SPIE 3411, Third International Conference on Vibration Measurements by Laser Techniques: Advances and Applications, (1 June 1998); doi: 10.1117/12.307746
Show Author Affiliations
Hans-Jochen Foth, Univ. of Kaiserslautern (Germany)
Ralf Kretner, Univ. of Kaiserslautern (Germany)


Published in SPIE Proceedings Vol. 3411:
Third International Conference on Vibration Measurements by Laser Techniques: Advances and Applications
Enrico Primo Tomasini, Editor(s)

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