Engineered hardwood flooring system having acoustic attenuation characteristics

An engineered hardwood flooring system comprising a plurality of planks, each plank comprising:

• a core plank having tongue and groove construction along its lateral edges, the core plank having a top surface and a bottom surface and containing a plurality of holes extending completely through the core plank from the top surface to the bottom surface, said holes being arranged in a pattern for attenuating acoustic energy propagating in the core plank;
• a hardwood top plate attached to the top surface of the core plank, the hardwood top plate comprising strips of thin hardwood glued together to form a planar hardwood plate;
• and
• a backing layer attached to the bottom surface of the core plank;
• and
• wherein the engineered hardwood flooring system further comprises a foam underlayment which is located underneath the backing layer and which cushions the planks when the engineered hardwood flooring system is installed over a sub-floor.