S20  Vibroacústica    Titulo: CHARACTERIZATION OF STRUCTURAL VIBROACOUSTICS PROPERTIES USING NEARFIELD ACOUSTIC HOLOGRAPHY   Resumo : ABSTRACT. NEARFIELD ACOUSTIC HOLOGRAPHY IS AN ATTRACTIVE WAY TO ANALYZE VIBROACOUSTIC PROBLEMS. HOLOGRAPHY IS A PROCESS THAT ALLOW TO DETERMINE ACOUSTIC FIELD WAVES CHARACTERISTICS USING A DISCRETE FOURIER TRANSFORM, FROM A REGULAR GRID OF MEASUREMENTS OBTAINED IN AN ACOUSTIC ENVIRONMENT FOR WHICH THE GREEN S FUNCTION IS KNOWN. THIS PAPER PRESENTS A BRIEF PRINCIPLE S REVIEW OF THIS TECHNIQUE WITH AN APPLICATION ON RECOVER THE VIBROACOUSTIC PROPERTIES OF A STRUCTURE. IN ORDER TO MINIMIZE SPATIAL LEAKAGE PROBLEM FROM SIGNAL PROCESSING A REGRESSIVE DISCRETE FOURIER SERIES WAS UTILIZED AS AN ALTERNATIVE TO WINDOWING TECHNIQUES. RESULTS OBTAINED FROM A PLATE TYPE STRUCTURE WERE ANALYZED, VALIDATED AND COMPARED WITH THEORETICAL PREDICTIONS. KEY-WORDS: ACOUSTIC HOLOGRAPHY, NEARFIELD ACOUSTIC HOLOGRAPHY, VIBROACOUSTIC, STRUCTURAL VIBRATIONS.     Autores : Colinas, Nilton G. Dos Santos, José Maria C.     Trabalho Completo :   COBEM99 | Comissão  Organizadora | Palestras | Sessões Técnicas | Autor | Simpósios e Sessões Especiais | Revisores |  Título  dos  Trabalhos | Local