J. Phys. IV France 02 (1992) C1-753-C1-756
SYNTHÈSE NUMÉRIQUE DE SOURCES INDUSTRIELLES POUR LE TEST DES MÉTHODES D'HOLOGRAPHIE ACOUSTIQUEJ.F. LI1, A. GARCIA1, C. CARLES1 and J.C. PASCAL2
1 Laboratoire d'Acoustique, Conservatoire National des Arts et Métiers (CNAM), 292 rue Saint-Martin, F-75141 Paris cedex 03, France
2 Centre Technique des Industries Mécaniques (CETIM), 52 avenue Félix-Louat, F-60300 Senlis, France
A numerical simulation model is presented for synthesizing the sound field by point sources (monopoles, dipoles etc) located in the space. Results are given in order to show the influence of the source coherence matrix to the sound radiation. The relationships between the source reference (in which the acoustic sources are defined) and the measuring reference (in which the measurements are made) are established in order to meet the need of the pratical traitement of acoustical measurement. By means of these transformations, the sound fields (the acoustic intensity, the density of potential energy and kinetic energy) can be easily illustrated on the rectangular plan or on the cylindrical surface, which could have any orientation and position with respect to the sound sources. From the results we have given several indications about the location and the characterization of the sound fields.
© EDP Sciences 1992