Abstract: The present invention relates to a light laminated acoustic absorption sheet. The light laminated acoustic absorption sheet with flame retardant is characterized in that one or more thermoplastic fibers (a) having a low melting point and selected from polyethylene, polypropylene, polyvinyl chloride, polyester, polyethylene-polyester copolymers, and one or more polyester interlaced-textured yarns or thermoplastic hollow fibers (b) having a higher melting point than the thermoplastic fiber (a) and selected from polyester, polyethylene, nylon, hot-meltable fluororesin are mixed and opened so as to prepare a mat, and two or more sheets of mats are laminated by using an apparatus of manufacturing a stampable sheet so as to manufacture the laminated sheet, and then the laminated sheet is impregnated with flame retardant liquid.

Abstract: A sound damping material for use in a sound damping laminate having one or more rigid layers, such as those used in the automotive industry. The sound damping material is preferably a viscoelastic material that damps or otherwise inhibits the transmission of vibrational or acoustical energy through the laminate, and also acts as an adhesive for bonding the rigid layers together. In its cured form, the sound damping material layer can include an acrylate-based polymer matrix, and one or more of the following components: a precipitated phase, a viscous phase, and miscellaneous constituents. The acrylate-based polymer matrix is the reaction product of at least one acrylate-based monomer, such as isobornyl acrylate.

Abstract: An acoustic assembly for a fan casing of a turbofan engine is made up from acoustic liner panel components which each comprise a body and a backing sheet. The body is an integral injection moulding that generally includes an acoustic structure, a perforated sheet and fastening portions. Adjacent panel components engage each other at non-linear circumferential edges which generally includes lugs on one of the components which are received in recesses of the other component. The lugs are defined by following cell walls over a convoluted path along the circumferential edge.

Abstract: A floor covering having slip-resistance and sound attenuation properties, particularly for reducing levels of sound resulting from high impact interactions. The floor covering includes at least a first layer and a second layer, wherein the first layer includes a particulate material at least partially embedded therein, and the second layer is capable of providing a sound attenuation effect with an acoustic impact sound reduction of at least about 15 decibels.

Abstract: The present invention relates to a covering element comprising a carrier element of fibre-reinforced thermoplastic plastic material, at least one sound-absorbing element extending over at least a part of the surface of the carrier element, and an adhesive layer extending over and beyond at least a part of the surface of the sound-absorbing element, wherein at least a part of the adhesive layer is adhered to the carrier element such that the sound-absorbing element is at least partly enclosed between the adhesive layer and the carrier element, to a method for manufacturing the covering element and the use thereof.

Abstract: The present invention provides an acoustical firewall attenuating assembly. The assembly includes a first frame assembly having a first plate, a second plate and a first plurality of elongate members spaced from one another and extending between the first plate and the second plate. A structure is spaced from the first frame assembly and has an outer surface. A cement wall is positioned between the first frame and the structure and is attached to at least the first frame assembly by a first vibration dampener.

Abstract: The invention relates to a material for absorbing noise in aircraft, comprising at least one barrier layer and at least one absorptive layer. The barrier layer is provided with an elastomeric material having a minimum specific density of 1 and a mass per unit area of 1.3 kg/m2 or less while the absorptive layer is equipped with a porous and/or open-cell material having a weight per volume of 4 to 50 kg/m3, preferably 10 to 40 kg/m3, more preferably 15 to 35 kg/m3 even more preferably 20 to 30 kg/m3. The mass per unit area of the sound-absorbing material amounts to 2 kg/m2 or less.

Abstract: The disclosed invention relates to a sound control mat, comprising: a resilient layer of extruded polymer monofilaments, and a fiberglass scrim adhered to the resilient layer. A floor assembly employing the foregoing sound control mat is disclosed.

Abstract: This invention is directed to a composite laminate comprising in order (a) a flame retardant polymeric moisture barrier (b) an inorganic platelet layer and (c) a flame retardant thermoplastic film layer The invention is also directed to a thermal insulation and acoustic blanket comprising a core of fibrous material or foam surrounded by the above composite laminate wherein the thermoplastic film layer of the composite laminate contacts and encapsulates the core.

Abstract: A heat-conductive noise suppression sheet according to an embodiment includes first ferrite particles, second ferrite particles, a heat-conducting material, and a matrix material. The first ferrite particles are spherical particles having an average particle diameter in the range of 50 ?m to 150 ?m, the content of the first ferrite particles with respect to the total amount of solid components being in the range of 5 vol % to 25 vol %. The second ferrite particles are irregularly shaped particles having an average particle diameter in the range of 50 ?m or less, the content of the second ferrite particles with respect the total amount of solid components being in the range of 5 vol % to 45 vol %.

Abstract: An improved acoustical floor/ceiling, or wall assembly affixed to a support structure, the assembly using laminar panels. A first one of the laminar panels includes a constraining layer of material with a layer viscoelastic glue on the constraining layer and a layer of material of a first composition on the layer of viscoelastic glue. A second one of the laminar panels includes a constraining layer of material with a layer of viscoelastic glue on the constraining layer of material and a layer of material of a composition different than that of the layer of material in the other laminar panel. In one assembly the material in the first laminar panel is cellulose-based material or wood, and the material in the second laminar panel is gypsum board. Constraining layers of material of metal, cellulose-based material, wood and petroleum-based products such as plastic, vinyl or rubber, ceramic, composite are employed.

Abstract: An apparatus comprising: a mount plate and at least one noise reduction element connected the mount plate. An article of head wear comprising: a shell having an upper portion and a lower open portion, at least one aperture located near the lower portion, and a noise reduction plate obstructing the at least one aperture. An article of head wear comprising: a shell having an upper portion and a lower portion, and a noise reduction element connected to the shell. A noise reduction element comprising: a frame having a framework, and a soundproofing element covering the framework. An apparatus comprising: a mount plate, and at least one aperture in the mount plate, wherein the aperture is formed to accommodate a noise reduction element.

Abstract: An improved acoustically and thermally insulating composite material suitable for use in structures such as buildings, appliances, and the interior passenger compartments and exterior components of automotive vehicles, comprising at least one airlaid fibrous layer of controlled density and composition and incorporating suitable binding agents and additives as needed to meet expectations for noise abatement, fire, and mildew resistance. Separately, an airlaid structure which provides a reduced, controlled airflow therethrough useful for acoustic insulation is provided, and which includes a woven or nonwoven scrim.

Abstract: An acoustic baffle assembly for sealing or baffling a hollow body having a mass of heat activated expandable material that is capable of activating at a predetermined temperature. A substrate supports the mass. The substrate has a central portion and spaced apart projections extending outwardly from the central portion. The projections are configured to control expansion of the mass.

Abstract: An apparatus comprises a core having a first surface configured for attachment to a surface of a structure, a face sheet located over a second surface of the core, a number of cavities within an interior of the core, and a number of ports for the number of cavities. The number of ports provides communication between the number of cavities within the interior of the core and the exterior of the core. The number of cavities and the number of ports are configured to reduce noise traveling through the core.

Abstract: The invention includes a corrugated decking flooring system. The corrugated decking flooring system can include a corrugated deck having at least two flutes and a trough between the flutes. A sound insulation layer generally conformal with both the flutes and the troughs of the corrugated deck can be provided. An underlayment layer can be provided over the sound insulation layer.

Abstract: The present invention relates to a non-combustible, sound-absorbing facing (30) having an air flow resistivity of between 80 and 3,000 Rayls and a weight per unit area of between 20 and 1,000 g/m2 and to a laminate (10) comprising the facing (30) and a substrate (20) wherein superimposing the facing (30) on the substrate (20) forms the laminate (10) having good sound absorbing characteristics.

Abstract: A laminated structure appropriate for use in constructing walls, floors, ceilings or doors, has a selected area and in one embodiment comprises two external layers of one or more materials such as, but not limited to, gypsum, at least one internal constraining layer having less than said selected area, and two or more internal layers of a viscoelastic glue separated by said at least one internal constraining layer, wherein each of said layers of viscoelastic glue is patterned to cover a selected percentage, but not all, of said area of said laminated structure thereby to allow moisture to pass through said structure.

Abstract: A sound insulating and absorbing automotive foot mat structure includes at least an upper water-proof layer and a lower sound absorbing layer. The upper water-proof layer is configured as a foaming material, and the lower sound absorbing layer is configured as needle-bonded cotton having a sound absorbing effect. Above the water-proof layer, it can be even added with a blanket and thermoplastic elastomer. Each layer of parts is attached and is formed integrally via a die-cast technology, allowing the mat to be provided with multiple functions of sound insulating, vibration reduction, sound absorbing, water-proofing, light weight and inexpensive manufacturing cost.

Abstract: A lightweight acoustical panel having a substantially monolithic appearance and high sound absorption capabilities is manufactured at a lower cost than acoustical panels having comparable properties. The panel is formed, punched with pins and coated with a coarse particle coating.

Abstract: Insulating element from mineral fibers for shipbuilding with an insulating element in form of a plate or roll felt for shipbuilding the composition of the mineral fibers of the insulating element points an alkali/alkaline-earth mass ratio of the fiber structure of the insulating element is determined by an average geometrical fiber diameter of ?4 ?m and a surface weight of 0.8 through 4.3 kg/m2 and a binding agent portion above 0.5 until 4 weight %.

Abstract: This invention discloses a method, using pure niobium as a transient liquid reactive braze material, for fabrication of cellular or honeycomb structures, wire space-frames or other sparse builtup structures or discrete articles using Nitinol (near-equiatomic titanium-nickel alloy) and related shape-memory and superelastic alloys. Nitinol shape memory alloys (SMAs), acquired in a form such as corrugated sheet, discrete tubes or wires, may be joined together using the newly discovered joining technique. Pure niobium when brought into contact with nitinol at elevated temperature, liquefies at temperatures below the melting point and flows readily into capillary spaces between the elements to be joined, thus forming a strong joint.

Abstract: A lightweight sound absorbing surface material, having an excellent sound absorbing property and moldability, and a sound absorbing material using the sound absorbing surface material, are provided in the present invention. The sound absorbing surface material 6 is manufactured by laminating stretchable paper(s) which is (are) creped and/or embossed (such as a creped paper 1b) onto one or both sides of a fiber sheet 3. The degree of creping of the paper is in the range of between 10 and 50%, and the height of projections of the embossed paper is in the range of between 0.02 and 2.00 mm, with the number of the projections being in the range of between 20 and 200 projections/cm2. Further, the sound absorbing surface material 6 is laminated onto a air permeable sheet of porous material 7, to manufacture a sound absorbing material 8.

Abstract: The invention therefore provides glazing which, to ensure improved acoustic insulation properties, requires not only an acoustic polymeric interlayer but also a suitable distribution of the masses of the elements on either side of the interlayer.

Abstract: The described and claimed soundproofing material is planar and has an inhomogeneous structure. It consists of a textile or mesh having relatively thick, adjacent longitudinal components and relatively thin components running in the transverse direction at a spacing from one another. Longitudinal microslits are formed between the longitudinal components by the distribution of the thin transverse components. The width of the microslits amounts to 0.01 and 0.4 mm, and the thickness of the longitudinal components amounts to at least five to ten times that of the microslits.

Abstract: Systems and methods for reducing noise in aircraft fuselages and other structures are described herein. A noise reduction system configured in accordance with one embodiment of the invention includes an auxetic core, a damping layer, and a constraining layer. In this embodiment, the auxetic core is supported by a structural member, and the damping layer is sandwiched between the auxetic core and the constraining layer. A method for manufacturing a structural assembly in accordance with another embodiment of the invention includes forming a stiffener by positioning a first ply of composite material against a first tool surface, positioning damping material against the first ply, and positioning a second ply of composite material against the damping material to sandwich the damping material between the first and second plies.

Abstract: The composite material multilayered membrane of the present invention is sound insulating and sound-absorbent, acting as sound deadening insulation for noise impacts, mainly but not exclusively to be used in flooring, and in particular under the slab in floating floors, with the aim of reducing the transmission of noise into the below room. This membrane includes several layers, which include at least one polymeric monofilament three dimensional mat, at least one resilient mat, and at least one topping layer of waterproofing, breathable or not, tissue. This multilayered membrane with a thickness under a weight of 2 kPa of at least 8 and maximum 15 mm, preferably 10-12 mm, so as to achieve a normalized noise level in the disturbed room Lnw below 50 dB, or an impact insulation class of at least 60 points.

Abstract: A shapeable framing element for the construction of panels comprising mounting means to affix said shapeable framing element to a substrate, said mounting means being divided into a plurality of mounting tabs defining a plurality of channels, thereby allowing said framing element to be shaped into curvilinear forms prior to being mounted upon said substrate. A shapeable element for attaching objects to a substrate.

Abstract: The invention relates to a foam ply based on a biodegradable polyester mixture, comprising i) from 70 to 5% by weight, based on the total weight of components i to ii, of at least one polyester based on aliphatic and aromatic dicarboxylic acids and on aliphatic dihydroxy compounds, and ii) from 30 to 95% by weight, based on the total weight of components i to ii, of poly-lactide, and iii) from 0.1 to 5% by weight, based on the total weight of components i to ii, of a copolymer which comprises epoxy groups and is based on styrene, acrylates, and/or methacrylates, and iv) from 0.5 to 15% by weight of additives; and v) from 0 to 50% by weight of inorganic or organic filler, and also to processes for production of the foam ply mentioned, and to the use of the foam plies for the production of moldings and foils, and also to moldings and foils comprising the foam plies mentioned.

Abstract: A polyimide fiber assembly of the present invention includes polyimide fibers having curved shapes with an average fiber diameter falling within a range of greater than 1 ?m to not greater than 100 ?m, the polyimide fiber assembly having a bulk density falling within a range of not less than 1 kg/m3 to not greater than 30 kg/m3. This makes it possible to realize a polyimide fiber assembly that is both excellent in thermal insulation performance and sound absorbency and light in weight.

Abstract: A sound barrier panel is providing having a concrete substrate and a noise attenuation layer forming a composite panel, in which the noise attenuation layer is formed of recycled shredded rubber and a binder.

Abstract: Disclosed is a sound-absorbing material, which has a flow resistivity R of 3.3×104 N·s/m4 or more, a Young's modulus E of 1.2×103 to 2.0×104 N/m2, and a loss factor ? of 0.12 or less. The sound-absorbing material of the present invention can enhance a sound absorption capability in a wide range of a low/intermediate-frequency region to a high-frequency region at a higher level as compared with conventional sound-absorbing materials.

Abstract: An acoustic equipment mat is formed by arranging plural grain pieces of inexpensive silica gel in a single layer. When the mat is disposed under an acoustic equipment, the grain pieces have their upper ends in point contact with a bottom or the like of the acoustic equipment and have their lower ends in point contact with the underlying floor or the like. Hence, the mat 1a is notably reduced in the area of contact with the acoustic equipment or the like, so as to reduce the reflection of vibrations. In addition, the mat 1a is capable of extremely quickly dissipating, in the atmosphere, the vibrations directly propagated to the upper-end side thereof and the vibrations indirectly propagated thereto as reflected by the lower-end side thereof.

Abstract: Multilayer articles having acoustical absorbance properties are disclosed. Methods of making and using the multilayer articles are also disclosed.

Abstract: Vibration or acoustic sound control is achieved using an elastic layer of thermal or insulation material in which a plurality of discrete masses are distributed throughout. The elastic layer may be installed as a pre-formed layer, or be blown into position within a structure where vibration or acoustic sound control is required.

Abstract: A composite material comprises a nonwoven layer having a viscoelastic interleaf, which may be positioned mid-ply therein.

Abstract: A sound absorbing structure includes a housing having a front face, and a side face which is provided perpendicularly around at least a part of an edge portion of the front face; a gas adsorption material for physically adsorbing gas in an interior space delimited by the front face and the side face of the housing, which gas adsorption material is placed in the interior space; sealing element for sealing the gas adsorption material from outside thereof; and an acoustic connection section for functioning as an acoustic mass so as to acoustically connect an exterior space and the interior space of the housing, which acoustic connection section is provided in at least one of the front face and the side face.

Abstract: A method of forming a sound attenuating material includes heating a densified, rebulkable nonwoven web at a sufficient temperature and for a sufficient time to rebulk the nonwoven web to an open, lofty form; compressing the rebulked nonwoven web to a predetermined thickness; and cooling the compressed nonwoven web at a sufficient temperature and for a sufficient time to cause the compressed nonwoven web to maintain the predetermined thickness. The cooled, compressed nonwoven web may further be formed into a desired shape. One or more additional layers of material may be laminated to the densified, rebulkable nonwoven web substantially simultaneously with the heating step. The nonwoven web may be heated to a temperature above the melt point of at least one component fiber of the nonwoven web and heating may be accomplished by heating one or both sides of the nonwoven web.

Abstract: A damped composite structure is formed from a matrix material and a plurality of shape memory alloy wire fibers held in the material matrix for damping the structure. The wire fibers may be embedded in a viscoelastic interlayer to increase damping of the structure. The wire fibers may be interspersed with reinforcement such as carbon fibers, in tows or in a mesh of fibers. The wire fibers have an inherent material loss factor greater than approximately 0.10, and may be formed from superelastic metal alloys, such as Ni—Ti, Cu—Zn—Al, Cu—Al—Ni, OR Cu—Al—Be.

Abstract: An improved vibration damping system is provided for use with window structures. The window damping system employs both air-film damping technology and viscoelastic damping materials to increase mechanical and/or acoustic vibration damping in window structures.

Abstract: A wrap-around cover or noise muffler of oil and temperature resistant noise absorbing resilient elastomer covers the front and sides of a front mounted engine oil pump forming a pump and muffler assembly. The muffler absorbs vibrations and reduces the transfer of noise frequencies from the oil pump to an engine front cover that covers the pump. Additionally, the front of the muffler is shaped to fill the gap and engage the front cover in compression between the oil pump and the rear surface of the front cover, thereby damping vibrations of the front cover adjacent to the oil pump and to an accessory drive pulley that rotates ahead of the front cover for driving accessories.

Abstract: It is an object of the present invention to provide a floor silencer that has good transport efficiency due to an ability to be transported in a flat state, and can be assembled to a floor panel of a vehicle by folding along a band-like concave portion. The floor silencer is used with a first surface side in contact with a floor carpet, and a second surface side in contact with the floor panel of the vehicle. The floor silencer also has the band-like concave portion and can be folded along the band-like concave portion. The floor silencer is transported in a flat state and not folded during transport, and is used folded along the band-like concave portion during assembly.

Abstract: Vibration or acoustic sound control is achieved using an elastic layer of thermal or insulation material in which a plurality of discrete masses are distributed throughout. The elastic layer may be installed as a pre-formed layer, or be blown into position within a structure where vibration or acoustic sound control is required.

Abstract: An acoustic protective panel for the fitting of a wall of a vehicle, has an upper porous layer, in particular with a felt or remelted flexible foam base, at least one zone of the porous layer being arranged on one sealing layer, the sealing layer being arranged on one backing layer (5) with a flexible polyurethane base forming a spring, said sealing layer being formed by impregnation on a portion of the thickness of the porous layer by the polyurethane of the backing layer overmoulding the porous layer. Architectures for mounting such a panel are described.

Abstract: The present invention relates to a light laminated acoustic absorption sheet. The light laminated acoustic absorption sheet with flame retardant is characterized in that one or more thermoplastic fibers (a) having a low melting point and selected from polyethylene, polypropylene, polyvinyl chloride, polyester, polyethylene-polyester copolymers, and one or more polyester interlaced-textured yarns or thermoplastic hollow fibers (b) having a higher melting point than the thermoplastic fiber (a) and selected from polyester, polyethylene, nylon, hot-meltable fluororesin are mixed and opened so as to prepare a mat, and two or more sheets of mats are laminated by using an apparatus of manufacturing a stampable sheet so as to manufacture the laminated sheet, and then the laminated sheet is impregnated with flame retardant liquid.

Abstract: The present invention relates to a liquid resin intended more particularly for the sizing of mineral fibers which exhibits a dilutability in water at 20° C. at least equal to 1 000% and a level of free formaldehyde preferably of less than 0.4%, expressed as total weight of liquid, this resin being characterized in that it is composed essentially of condensates obtained from a phenolic compound, from formaldehyde and from an aminoalcohol according to the Mannich reaction. The invention also relates to a sizing composition including said resin, to the mineral fibers sized by means of this composition and to the products formed from the mineral fibers, in particular for thermal and/or sound insulation.

Abstract: An optically reflective sound absorbing device (13) comprising a sound absorbing structure (25), and a non-porous optically reflective sound transfer medium (17) that is configured and arranged to transfer sound waves incident on the sound transfer medium (17) to the sound absorbing structure (25) for absorption thereby.

Abstract: A sound-absorbing material, wherein a non-woven fabric with a mass per unit area of 150 to 800 g/m2 and a bulk density of 0.01 to 0.2 g/cm3 and a surface material with an air permeability of not more than 50 cc/cm2/sec measured according to JIS L-1096 are layered.

Abstract: A composite, light weight flexible, moldable composite acoustic barrier and method of making the same.

Abstract: The invention relates to wood fiber insulating material boards and mats, in which the wood fibers and the binder fibers are aligned three-dimensionally. The fleece of wood fibers and binder fibers can alternatively have synthetic resin granules scattered on it. Likewise, a woven fabric or a film can be applied to one or both sides. The product obtained in this way is heated in a heating/cooling oven, calibrated and/or compacted to the desired final thickness.