VIBROACOUSTIC RESPONSE OF A COMPOSITE MULTILAYERED PLATE COUPLED TO ARECTANGULAR CAVITY AND EXCITED BY WHITE-NOISE AND A TURBULENT BOUNDARY-LAYER

Sound transmission through viscoelastic composite multilayered plate i nto rectangular enclosures is investigated in the low frequency range (0-1000 Hz). In the analytical modal approach used here, several hypot heses are presented in order to get numerical results for large system s (volumes of 100 m(3)). The plate is either excited by white noise or by a Turbulent Boundary Layer (TBL). Results show the extreme influen ce of the transversal shear terms of the core and the dependence of th e power spectral density of the internal pressure to U-infinity(7) for the case of TBL when 50 < U-infinity < 100 m/s.