The invention relates to an An acoustic protection system for a motor vehicle has two walls extending opposite each other; an elastically compressible acoustic decoupling layer arranged in compression at least along its periphery between the walls, the layer having two opposing faces pressed respectively against each of the walls, the faces being connected to each other by an edge, the layer being enclosed in a bag made from plastic film closed so as to form a sealed barrier on the edge, at least one air passage hole being provided in the bag opposite at least one of the faces, the hole being arranged at a distance from the edge so as to provide, around the hole, a seal created by the bag bearing on the corresponding wall.

The invention relates to an An acoustic protection system for a motor vehicle has two walls extending opposite each other; an elastically compressible acoustic decoupling layer arranged in compression at least along its periphery between the walls, the layer having two opposing faces pressed respectively against each of the walls, the faces being connected to each other by an edge, the layer being enclosed in a bag made from plastic film closed so as to form a sealed barrier on the edge, at least one air passage hole being provided in the bag opposite at least one of the faces, the hole being arranged at a distance from the edge so as to provide, around the hole, a seal created by the bag bearing on the corresponding wall.

An acoustic structure presenting a front surface and a back surface is provided. The acoustic structure includes a support layer comprising the back surface, a honeycomb core comprising a thickness defined between a back and a front, and a plurality of walls that define a plurality of honeycomb cells, wherein the plurality of honeycomb cells extend through the thickness of the honeycomb core opening out toward at least the front, and wherein the back of the honeycomb core is affixed to the support layer, a mesh layer affixed to the front of the honeycomb core, and a knit fabric layer affixed to the mesh layer and conforming to the front surface of the acoustic structure.

An acoustic structure presenting a front surface and a back surface is provided. The acoustic structure includes a support layer comprising the back surface, a honeycomb core comprising a thickness defined between a back and a front, and a plurality of walls that define a plurality of honeycomb cells, wherein the plurality of honeycomb cells extend through the thickness of the honeycomb core opening out toward at least the front, and wherein the back of the honeycomb core is affixed to the support layer, a mesh layer affixed to the front of the honeycomb core, and a knit fabric layer affixed to the mesh layer and conforming to the front surface of the acoustic structure.

A flexible sound barrier and rigid mounting assembly, and a method of attaching to a vehicle. The sound barrier assembly includes a rigid substrate, and flexible noise barrier and decoupling layers. The decoupling and noise barrier layers are bonded, and an adhesive bonds the decoupling layer to the substrate. The decoupling and noise barrier layers are fixedly held in place by the substrate. The substrate can include slots that fit over mounting studs on the vehicle wall. The noise barrier and decoupling layers can include mounting holes that extend through both layers, where the mounting holes line up with the slots, and fit over the mounting studs. The assembly can be mounted on the mounting studs and stud fasteners can fit through a mounting hole without compressing the noise barrier and decoupling layers and sandwich the rigid substrate surrounding a slot between the stud fastener and the vehicle wall.

A flexible sound barrier and rigid mounting assembly, and a method of attaching to a vehicle. The sound barrier assembly includes a rigid substrate, and flexible noise barrier and decoupling layers. The decoupling and noise barrier layers are bonded, and an adhesive bonds the decoupling layer to the substrate. The decoupling and noise barrier layers are fixedly held in place by the substrate. The substrate can include slots that fit over mounting studs on the vehicle wall. The noise barrier and decoupling layers can include mounting holes that extend through both layers, where the mounting holes line up with the slots, and fit over the mounting studs. The assembly can be mounted on the mounting studs and stud fasteners can fit through a mounting hole without compressing the noise barrier and decoupling layers and sandwich the rigid substrate surrounding a slot between the stud fastener and the vehicle wall.

An acoustic material comprising one or more acoustic composite layers; and a facing layer, wherein the one or more acoustic composite layers are formed of a nonwoven sound absorption material; wherein the facing layer is permeable; and wherein the facing layer is attached to a top surface of the one or more acoustic composite layers. The facing layer may optionally include metallic components or a metallized outer surface. The acoustic material may optionally include a pressure sensitive adhesive material on an opposing side of the one or more acoustic composite Sayers to enable installation of the acoustic material. The facing layer may include a permeable scrim, a perforated film, or a perforated foil. The facing layer may be metalized on its top exposed surface to provide infrared heat reflection, and a corrosion resistant coating may be applied on top of the metalized layer if required to stabilize the metal coating.

An acoustic material comprising one or more acoustic composite layers; and a facing layer, wherein the one or more acoustic composite layers are formed of a nonwoven sound absorption material; wherein the facing layer is permeable; and wherein the facing layer is attached to a top surface of the one or more acoustic composite layers. The facing layer may optionally include metallic components or a metallized outer surface. The acoustic material may optionally include a pressure sensitive adhesive material on an opposing side of the one or more acoustic composite Sayers to enable installation of the acoustic material. The facing layer may include a permeable scrim, a perforated film, or a perforated foil. The facing layer may be metalized on its top exposed surface to provide infrared heat reflection, and a corrosion resistant coating may be applied on top of the metalized layer if required to stabilize the metal coating.

A laminated structure for use in retrofit building construction (partition, wall, ceiling, floor or door) that exhibits improved acoustical sound proofing characteristics while being optimized for efficient installation. The laminated structure includes a panel with at least one layer of viscoelastic glue, or fire-10 resistant, viscoelastic glue, which functions both as a glue and an energy dissipating layer. In one embodiment, the laminated structure to be attached to an existing wall in some embodiments includes standard paper-faced gypsum board. In another embodiment the to-be-applied laminated structure includes a cement-based board, and in yet another embodiment the to-be-applied laminated 15 structure includes a cellulose-based board. Once the laminated structure is installed on an existing wall or other partition, the resulting structure greatly attenuates transmitted noise and minimizes the labor required for installation and finishing.

The acoustic shutter assembly (1) includes at least one window pane (2, 3) arranged in a frame (4). At least one ventilation duct (7) is arranged in the frame between an outer ventilation opening (8) and an inner ventilation opening (9), extending between a first layer of sound absorbing material arranged at an inside (5) and a second layer of sound absorbing material arranged at an outside. A number of acoustic reflectors (12) in the form of plate material are arranged between the first and second layers of sound absorbing material so that the ventilation duct is separated into a number of respective ventilation channels (13) formed between the acoustic reflectors. Each ventilation channel changes direction at least once between the outer ventilation opening and the inner ventilation opening, thereby at least substantially blocking any linear path from the outer ventilation opening to the inner ventilation opening.