Abstract: An acoustically insulating electrical box made of plastic material comprises a box-like wall structure with an open face. A planar, outward flange is integral with the box-like structure around all of the open face. A building, wall or ceiling board is provided with an opening therein to receive the box-like structure with the back of the flange facing the front of the board. Fasteners attach the flange directly on the board with a silicone sealant pressed between the back of the flange and the front of the board. The box-like structure includes apertures through which electrically conducting wires enter the electrical box and which are also sealed with silicone, the box-like structure being otherwise non perforated.

Abstract: An acoustically insulating floor panel comprises a top board having an underside. Spacing laths are mounted on the underside of the top board. A layer of fibrous, mineral wool is glued on the top board underside between the spacing laths. The panel is adhered to an already existing, supporting floor through pads made of resilient, high density polyurethane foam, self adhesive on both sides thereof, and interposed between the laths and the supporting floor.

Abstract: Toilet bowls made of porcelain are conventionally disposed directly on the floor and/or attached thereto through rigid connections. When the toilet is used, acoustic vibratons are therefore transmitted from the bowl to the floor and spread all over the dwelling. In the case of a multiple unit residential building, the acoustic vibrations even reach the surrounding residential units and disturb their occupants. To overcome this drawback, the acoustically insulating method proposes to insert a strip of rubber foam between the base of the bowl and the floor and to attach the toilet bowl to the floor through a pair of fasteners each including a rubber link, whereby no acoustic short circuit is established between the bowl and floor to thereby considerably reduce the transmission of acoustic vibrations to the floor.

Abstract: An acoustic door comprises a frame as well as a first panel of gypsum mounted on the frame and having its outer face covered with a sheet of metal and its inner face covered with a layer of lead (Pb) to thereby form a first rigid wall. A second panel of gypsum of different thickness has also its outer face covered with a sheet of metal and its inner face covered with a layer of lead to form a second rigid wall. A strip of flexible material adhesive on both sides thereof is used to mount the second wall on the assembly frame-first wall while establishing no acoustic short circuit between them. The first and second walls are relatively thin while being sufficiently rigid whereby the space of air between the two layers of lead is maximized. This air space also contains acoustic insulation including fibers set into vibration to transform the mechanical energy of sound waves into heat.