Abstract: The teachings herein relate to sound damping materials and particularly to sound damping materials for castings. The sound damping material includes a surface layer including an elastomer and a filler. Preferably the filler includes glass or ceramic beads. The surface layer preferably has a textured surface for contacting with the casting. Preferably the filler has a diameter that provides or contributes to the textured surface. For example, a portion of the filler may have a diameter that is greater than the average thickness of the surface layer. The sound damping material includes one or more metallic layers, preferably for applying a force to a surface of the casting. The sound damping material preferably includes two metallic layers that are separated by a core polymeric layer.

Abstract: A damped windage tray for an engine including a windage tray formed from a laminate. The laminate operates to damp vibrations of the windage tray. The laminate includes a first constraining layer, a second constraining layer and a viscoelastic damping layer disposed between the first and second constraining layer. The viscoelastic damping layer spans substantially the entirety of the first and second constraining layers. Additionally, a method of forming the windage tray is provided.