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 a method for producing an absorbing sound insulation motor vehicle trim element having a four-layered structure made from a first foam layer, a second foam layer, a non-woven foam layer and a non-woven fabric layer. The invention further relates to an absorbing sound insulation motor vehicle trim element.

Disclosed are a resin composite having excellent soundproofing and mechanical properties, and a molded product including the same. The resin composite may include a resin composition, porous particles and a reinforcing material, and the molded product including the same include no volatile organic compounds (VOCs). As consequence, displeasure caused by generation of the VOCs and exhaust of toxic gas during combustion may be reduced thereby being environmentally friendly. Further, the resin composite and the molded product including the same demonstrate sufficient mechanical strength and may thus be directly applied to a housing or the like of an apparatus which generates noise without introduction of any additional soundproofing material. For example, the resin composite and the molded product may include a specific content of the porous particles having pores having a specific size to secure an appropriate volume fraction and may thus efficiently and economically block noise transmission.

An assembly includes a panel member and an acoustic sink member. The panel member has a panel edge, and first and second long axes defining a plane. The panel member has a first material composition. The acoustic sink member has a body with a periphery which is coupled to the panel edge. The body has a second material composition, which is distinct from the first material composition. An acoustic impedance of the sink member at the periphery is equal to an acoustic impedance of the panel member at the panel edge, and the body has a cross-sectional profile defined by a power law.

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.

Disclosed herein is a technique for further improving the quietness in a vehicle cabin while reducing an increase in the weight of a motor vehicle. A noise reduction member, arranged in a fender inner space defined between a fender panel serving as an exterior panel for a motor vehicle and an inner fender forming a wheelhouse, includes a pair of wall portions which are made of a foamed material and arranged to be spaced apart from each other.

A radiant panel includes a surface layer that is thermally conductive and includes exterior and interior surfaces. A first interior layer is electrically conductive and includes exterior and interior surfaces. The exterior surface of the first interior layer and the interior surface of the surface layer are coupled to one another. A second interior layer includes thermally insulative properties and a first rigidity. The second interior layer includes exterior and interior surfaces. The exterior surface of the second interior layer and the interior surface of the first interior layer are coupled to one another. A third interior layer includes thermally insulative properties and a second rigidity. The third interior layer includes exterior and interior surfaces. The exterior surface of the third interior layer and the interior surface of the second interior layer are coupled to one another. The second rigidity is greater than the first rigidity.

A sound isolation device includes at least one degenerate acoustic scatterer having a plurality of channels. The plurality of channels may include three or more channels. The channels have an open end and a terminal end, wherein the terminal ends of the channels are separate from one another. The at least one degenerate acoustic scatterer has an acoustic monopole response and an acoustic dipole response that have a substantially similar resonant frequency.

A method of manufacturing a component includes additively manufacturing (AM) a plurality of interior layers of the component and AM at least one anti-bump, squeak, rattle (BSR) layer of the component such that the at least one anti-BSR layer reduces BSR acoustic noise compared to the plurality of interior layers. The at least one anti-BSR layer can be a plurality of anti-BSR layers and the plurality of anti-BSR layers includes a BSR property that is different than a corresponding BSR property of the plurality of interior layers.

Noise caused by vibration of a door hole seal is reduced. A door hole seal includes a first sheet having a slit formed therein and a second sheet covering the slit from an exterior side of a vehicle. At least a specific region of the second sheet is made of a rubber-like elastic body, the specific region extending from a portion corresponding to the slit to a vertically lower end of the second sheet.