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A board comprised of a wood structure having a first surface, a second surface, a first lateral edge, a second lateral edge and opposing ends. Sound attenuating elements embedded within the wood structure and stiffening elements positioned within the wood structure to coincide with the location of f

A board comprised of a wood structure having a first surface, a second surface, a first lateral edge, a second lateral edge and opposing ends. Sound attenuating elements embedded within the wood structure and stiffening elements positioned within the wood structure to coincide with the location of floor joist to which the board will be secured. The boards further forming a ceiling/floor structure by laying a single set of the boards adjacent to each other and securing them to the floor joists.

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1. A combined ceiling and floor structure, comprising: floor joists and a single set of adjacent boards; wherein said floor joists span between walls of a first room and a second room; wherein each adjacent board has a first surface, a second surface, a first lateral edge and a second lateral edge;

1. A combined ceiling and floor structure, comprising: floor joists and a single set of adjacent boards; wherein said floor joists span between walls of a first room and a second room; wherein each adjacent board has a first surface, a second surface, a first lateral edge and a second lateral edge; wherein each adjacent board includes a softwood layer bonded to a hardwood layer; wherein said first surface is softwood and said second surface is hardwood; wherein said first lateral edge has a tongue; wherein said second lateral edge has a groove; wherein said first and second lateral edges have a chamfer on said first surface; wherein said softwood is laid towards said floor joists; wherein said adjacent boards are secured to said floor joist with said tongue in said groove; wherein each adjacent board has embedded sound attenuating elements; wherein each embedded sound attenuating element has a first side and a second side; wherein all first sides of said sound attenuating elements are covered completely by said first surface of softwood; wherein all second sides of said sound attenuating elements are covered completely by said second surface of hardwood; wherein each adjacent board has transverse stiffening elements embedded therein; wherein said transverse stiffening elements are milled to coincide with the location of said floor joist to which said board is secured; and wherein said sound attenuating elements are a continuous layer of sound attenuating material. 2. A structure as recited in claim 1, wherein the walls of the first room are softwood; wherein said first surface of softwood of said single set of adjacent hoards is the same species of wood as the softwood of the walls of the first room. 3. A structure as recited in claim 1, wherein each said adjacent board includes a microbevel on said first and second lateral edges; wherein said micro-bevel is on said second surface. 4. A board, comprising: a) a piece of wood including a softwood layer directly bonded to a hardwood layer; said piece of wood having a first surface of softwood, a second surface of hardwood, a first lateral edge, a second lateral edge and opposing ends;b) a tongue in said first lateral edge and a groove in said second lateral edge;c) sound attenuating elements embedded within said piece of wood, each sound attenuating element having a first side and a second side, all first sides of said sound attenuating elements covered completely by said first surface of softwood, all second sides of said sound attenuating elements covered completely by said second surface of hardwood; andd) a plurality of transverse stiffening elements along the length of said piece of wood, said plurality of transverse stiffening elements milled within said piece of wood and located interior said piece of wood, said plurality of transverse stiffening elements are spaced along the length of said piece of wood at equal distances.