A cellular structure may include a plurality of cells each having a twelve-cornered cross section. The twelve-cornered cross section may include twelve sides and twelve corners creating eight internal angles and four external angles. Each cell may include a plurality of longitudinal walls extending between a top and a bottom of the cell, the longitudinal walls intersecting to create corners of the cell. A structural component may include at least one wall surrounding a component interior space with a cellular structure having at least two cells being positioned within the interior space. A sandwich structure may include first and second substantially planar structures, and a cellular structure with at least two cells positioned between the first and second substantially planar structures.

A cellular structure may include a plurality of cells each having a twelve-cornered cross section. The twelve-cornered cross section may include twelve sides and twelve corners creating eight internal angles and four external angles. Each cell may include a plurality of longitudinal walls extending between a top and a bottom of the cell, the longitudinal walls intersecting to create corners of the cell. A structural component may include at least one wall surrounding a component interior space with a cellular structure having at least two cells being positioned within the interior space. A sandwich structure may include first and second substantially planar structures, and a cellular structure with at least two cells positioned between the first and second substantially planar structures.

What is presented is a unit cell that has a cellular geometry that comprises cell walls and cell edges arranged into a combination of a cubic cell geometry and a tetrahedral cell geometry and assembled structures that comprise a plurality of unit cells. The voids of the unit cell created by the combination of geometries comprise regular tetrahedrons, irregular tetrahedrons, and octahedrons. In some embodiments, the thickness of selected cell walls can vary and in some embodiments have zero thickness. In some embodiments selected cell walls and selected cell edges have a varied thickness. In other embodiments selected cell walls are non-planar. In some embodiments selected cell walls may have one or more holes. Selected cell edges of some embodiments of unit cell may have varying cross-sectional geometry that vary along a length of the cell edge. Some embodiments of the unit cell may comprise fillets to blunt stress concentrations.

A wall module comprises face panels and stud members connected to and spacing the face panels from one another. End panels are connected to ends of the assembly of the face panels and of the stud members to form a box body with the face panels and the stud members, the box body having an inner cavity. Cross member(s) extend between stud members and/or between the face panels. The body box has an elongated upstanding shape when the assembly of the face panels and of the stud members is vertical, such that the face panels form a wall when a plurality of the wall module are positioned side by side with the stud members of adjacent ones of the wall modules being coplanar. A wall comprises a plurality of the wall modules.

A wall module comprises face panels and stud members connected to and spacing the face panels from one another. End panels are connected to ends of the assembly of the face panels and of the stud members to form a box body with the face panels and the stud members, the box body having an inner cavity. Cross member(s) extend between stud members and/or between the face panels. The body box has an elongated upstanding shape when the assembly of the face panels and of the stud members is vertical, such that the face panels form a wall when a plurality of the wall module are positioned side by side with the stud members of adjacent ones of the wall modules being coplanar. A wall comprises a plurality of the wall modules.

An insulation product may include a container, a first insulation material forming a first layer inside the container, and a second insulation material forming a second layer inside the container, and the first layer is compressed by the second layer. A structure in a building may include studs, first and second claddings mounted to opposite sides of the studs, and structure spaces defined between the studs and the opposing claddings. A first insulation material may include first layers on and substantially covering a first one of the claddings inside the structure spaces. In addition, a second insulation material may have second layers inside the structure spaces. The first layers are compressed and substantially covered by the second layers, and the second layers substantially cover a second one of the claddings inside the structure spaces.

An insulation product may include a container, a first insulation material forming a first layer inside the container, and a second insulation material forming a second layer inside the container, and the first layer is compressed by the second layer. A structure in a building may include studs, first and second claddings mounted to opposite sides of the studs, and structure spaces defined between the studs and the opposing claddings. A first insulation material may include first layers on and substantially covering a first one of the claddings inside the structure spaces. In addition, a second insulation material may have second layers inside the structure spaces. The first layers are compressed and substantially covered by the second layers, and the second layers substantially cover a second one of the claddings inside the structure spaces.

A hollow core door for a room, the door includes a stile and rail frame, an inside skin having a plurality of holes extending therethrough, an outside skin having a plurality of holes extending therethrough, both skins secured to the frame. The door includes a-panel disposed between the inside and outside skins, the panel having a surface area greater than an area of the pluralities of holes, and having openings disposed laterally of the pluralities of holes. The panel includes a slider panel having a plurality of slider panel openings, the slider panel slidable to alternately allow or block a flow of air. The pluralities of holes are located whereby air flows inwardly through the plurality of holes in the inside skin, divides, flows about the panel and through its openings, and outwardly through the plurality of holes in the outside skin in a non-linear manner.

Methods and apparatus to couple a decorative layer to a panel via a high-bond adhesive layer are disclosed. An example apparatus includes a panel, a high-bond adhesive layer fixed to the panel, a liner fixed to the high-bond adhesive layer that is fixed to the panel, and a first decorative layer removably coupled to the liner that is fixed to the high-bond adhesive layer via a second adhesive layer. The high-bond adhesive layer is to impede at least one of gas or vapor from escaping the panel to deter the at least one of gas or vapor from exerting a pressure on the first decorative layer to deter a portion of the first decorative layer from separating from the panel.

An example method for manufacturing a multicellular structure for acoustic damping is described that includes applying a porogen material to a solid support, inserting a multicellular frame into the solid support and through the porogen material so as to fill cells of the multicellular frame with the porogen material, fusing the porogen material, removing the multicellular frame from the solid support, and the multicellular frame contains a suspended fused porogen network attached to walls of the cells of the multicellular frame. The method also includes applying a solution to the suspended fused porogen network in the cells of the multicellular frame to percolate the suspended fused porogen network, curing the solution, and removing the suspended fused porogen network from the multicellular frame resulting in porous septum membranes of the cured solution in cells of the multicellular frame.