Analysis of clarinet reed oscillations with digital Fresnel holography

P. Picart (1, 2) , J. Leval (1) , F. Piquet (2) , J.-P. Boileau (2) , Jean-Pierre Dalmont (1)

1 LAUM - Laboratoire d'Acoustique de l'Université du Mans
2 ENSIM - Ecole Nationale Supérieure d'Ingénieurs du Mans

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.

Mots clés: Physical Sciences

P. Picart, J. Leval, F. Piquet, J.-P. Boileau, Jean-Pierre Dalmont. Analysis of clarinet reed oscillations with digital Fresnel holography. European Physical Journal: Applied Physics, 2009, 47 (1), pp.1-8. ⟨10.1051/epjap/2008201⟩. ⟨hal-00480142⟩