Identification passive en milieux acoustiques faiblement visqueux Expérimentations
Résumé
This paper presents an experimentation about passive identification of an acoustic propagation medium. This latter consists in estimating the impulse response, also called Green function, between to measurement points by using uncontrolled sources. The theory of passive identification implies the consideration of a dissipation model in the pressure propagation equation. The experimentation highlights the relevance of the viscous damping model beside the constant damping model usually considered. Data also provide interesting elements for discussing the effect of the number of sources, the spectral and statistichal properties of the sources on the quality of the Green function estimation.