Numéro
J. Phys. IV France
Volume 04, Numéro C5, Mai 1994
3ème Congrés français d'acoustique
3rd French conference on acoustics
Page(s) C5-609 - C5-612
DOI https://doi.org/10.1051/jp4:19945130
3ème Congrés français d'acoustique
3rd French conference on acoustics

J. Phys. IV France 04 (1994) C5-609-C5-612

DOI: 10.1051/jp4:19945130

Caractérisation du rayonnement de la table d'harmonie d'un piano droit

Ph. DEROGIS and R. CAUSSÉ

I.R.C.A.M., 1 Place Igor Stravinsky, 75004 Paris, France


Abstract
In this paper we present a simple model of a upright piano soundboard as a baffled isotrope plate. This model enables us to calculate analytically the sound radiation of the soundboard in the back semi-infinite space of the piano and to find the frequency threshold of the appearance of the lobe of maximum pressure for each mode. These results are compared with measurements on a real upright piano. We find that the resonance frequency of the modes are less than this frequency threshold, therefore the maximum sound radiation can not occur. The pattern of the sound radiation appears to follow the theoretical model but more experiments will be required to show this clearly.



© EDP Sciences 1994