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Analysis of clarinet reed oscillations with digital Fresnel holography

Published online by Cambridge University Press:  17 February 2009

P. Picart ,
J. Leval ,
F. Piquet ,
J.-P. Boileau  and
J.-P. Dalmont
P. Picart*
Affiliation:
LAUM, CNRS, Université du Maine, Av. O. Messiaen, 72085 Le Mans Cedex 09, France ENSIM-École Nationale Supérieure d'Ingénieurs du Mans, Rue Aristote, 72085 Le Mans Cedex 09, France
J. Leval
Affiliation:
LAUM, CNRS, Université du Maine, Av. O. Messiaen, 72085 Le Mans Cedex 09, France
F. Piquet
Affiliation:
ENSIM-École Nationale Supérieure d'Ingénieurs du Mans, Rue Aristote, 72085 Le Mans Cedex 09, France
J.-P. Boileau
Affiliation:
ENSIM-École Nationale Supérieure d'Ingénieurs du Mans, Rue Aristote, 72085 Le Mans Cedex 09, France
J.-P. Dalmont
Affiliation:
LAUM, CNRS, Université du Maine, Av. O. Messiaen, 72085 Le Mans Cedex 09, France
*
[email protected]
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Abstract

This paper describes optical instrumentation devoted to vibration analysis. Two strategies based on digital Fresnel holography are presented. The first, called time-averaging consists in the numerical reconstruction of the hologram after recording with an exposure time much greater than the vibration period. Thus, the holograms are amplitude modulated by a Bessel function. The last strategy, using a pulsed regime, allows the reconstruction of the full movement of the vibration, even if it exhibits very high amplitude. Experimental results presented in this paper concern the study of the vibrations of a clarinet reed under free and forced oscillation regimes.

Keywords

Type
Research Article
Information
The European Physical Journal - Applied Physics , Volume 47 , Issue 1: 4th Colloquium Interdisciplinary in Instrumentation (C2I 2007) , July 2009 , 12706
Copyright
© EDP Sciences, 2009

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