| 摘要 |
A structure for eliminating or reducing noise emission from a structure which vibrates at two or more discrete frequencies is described. Vibration damping tiles are secured to the surface of the structure with each tile have a high density layer linked to the structure by a layer of plastic material, such as polyurethane foam, with the mass of the high density layer, the dimensions of the layer of the plastic material and the properties of the plastic material selected so that the compression mode and shear mode resonant frequencies correspond to two of the discrete frequencies of the structure. The noise suppression device is particularly suited for use with wind turbines.
|
