Plane Wave Synthesis Facility for Sound Transmission Measurements on Panels

摘要

The National Aerospace Laboratory NLR has a facility for narrowband, low211u001efrequency sound transmission research on panel-structures. The panels have free-211u001efree boundary conditions and are curved in one direction, can be stiffened or 211u001eunstiffened, single or double and have maximum dimensions of 1.2 x 2.0 sq m. The 211u001eacoustic excitation of the panels can be a pure tone or periodic random noise; it 211u001eis performed by an array with 3 x 4 ducts with an independently driven 211u001eloudspeaker in each duct. The cross sectional dimensions of each duct ensure that