title: Experimental vibroacoustic testing of plane panels using synthesized random pressure fields.
abstract: The experimental reproduction of random pressure fields on a plane panel and corresponding induced vibrations is studied. An open-loop reproduction strategy is proposed that uses the synthetic array concept, for which a small array element is moved to create a large array by post-processing. Three possible approaches are suggested to define the complex amplitudes to be imposed to the reproduction sources distributed on a virtual plane facing the panel to be tested. Using a single acoustic monopole, a scanning laser vibrometer and a baffled simply supported aluminum panel, experimental vibroacoustic indicators such as the Transmission Loss for Diffuse Acoustic Field, high-speed subsonic and supersonic Turbulent Boundary Layer excitations are obtained. Comparisons with simulation results obtained using a commercial software show that the Transmission Loss estimation is possible under both excitations. Moreover and as a complement to frequency domain indicators, the vibroacoustic behavior of the panel can be studied in the wave number domain.
authors.affiliation: Groupe d'Acoustique de l'Université de Sherbrooke, Université de Sherbrooke, Sherbrooke J1K 2R1, Canada.
authors.forename: Olivier
authors.initials: O
authors.lastname: Robin
authors.affiliation: Groupe d'Acoustique de l'Université de Sherbrooke, Université de Sherbrooke, Sherbrooke J1K 2R1, Canada.
authors.forename: Alain
authors.initials: A
authors.lastname: Berry
authors.affiliation: Groupe d'Acoustique de l'Université de Sherbrooke, Université de Sherbrooke, Sherbrooke J1K 2R1, Canada.
authors.forename: Stéphane
authors.initials: S
authors.lastname: Moreau