Abstract: A material for use in building construction (partition, wall, ceiling, floor or door) that exhibits improved acoustical sound proofing and fire resistance. The material comprises a laminated structure having as an integral part thereof one or more layers of intumescent viscoelastic material which also functions as a glue, energy dissipating layer, and a fire resistive layer; and one or more constraining layers, such as gypsum, cement, metal, cellulose, wood, or petroleum-based products such as plastic, vinyl, plastic or rubber. In one embodiment, standard wallboard, typically gypsum, comprises the external surfaces of the laminated structure.

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 damping composition for a vibrational damping layer is provided, including about 5 to about 40 weight percent butyl rubber and about 4 to about 12 weight percent ethylene copolymer. In one embodiment, the damping composition can include about 10 to about 30 weight percent butyl rubber, about 4 to about 12 weight percent ethylene vinyl acetate about 10 to about 40 weight percent filler, about 5 to about 15 weight percent plasticizer, about 2 to about 30 weight percent tackifier, and about 1 to about 10 weight percent adhesion promoter. A damping system is also provided, including a base blank, a constraining layer, and a damping layer, wherein the damping layer comprises from about 5 to about 40 weight percent of a butyl rubber, and is in contact with and positioned in between the base blank and the constraining layer.

Abstract: Sound barrier panels that are made from various waste materials, including scrap fiberglass reinforced plastic (FRP), scrap carpet fibers, recyclable plastics and mineral wool.

Abstract: A multilayer laminate comprising a first polymeric film layer capable of withstanding a temperature of at least 200 C for at least 10 min, a first adhesive layer having an areal weight of from 2 to 40 gsm capable of activation at a temperature of from 75 to 200 degrees C., an inorganic refractory layer, a second adhesive layer having an areal weight of from 4 to 40 gsm capable of activation at a temperature of from 75 to 200 degrees C. and a second polymeric film layer capable of withstanding a temperature of at least 200 C for at least 10 min, wherein at least one of the first or second polymeric film layers is thermoplastic.

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: An acoustically coupled non-woven composite containing a non-woven layer and a thermoplastic film. The non-woven layer contains a plurality of binder fibers and a plurality of bulking fibers and has a binder zone and a bulking zone.

Abstract: A monolithically fabricated sound absorbing structural precast concrete noise barrier panel comprising a sound absorbing layer of specialized raw materials. The raw materials include wood particles as well as granulated rubber.

Abstract: The invention concerns a multilayer composite material comprising at least one core (3) interposed between two external layers (1, 2), wherein: —the core (3) is a layer of thermoviscous fluid at room temperature, said thermoviscous fluid having a dynamic viscosity coefficient greater than 100 Pa·s at room temperature, —each external layer (1, 2) is in a material in the solid state at room temperature, each external layer having a surface mass of less than 8 kg/m2.

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. 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. The method can further include forming a skin by positioning a third ply of composite material against a second tool surface offset from the first tool surface, and attaching the stiffener to the skin by co-curing the first, second and third plies of composite material.

Abstract: A monolithically fabricated sound absorbing structural precast concrete noise barrier panel comprising a sound absorbing layer of specialized raw materials. The raw materials include wood particles as well as granulated rubber.

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 method of forming a monolithically fabricated sound absorbing structural precast concrete noise barrier panel comprising a sound absorbing layer of specialized raw materials. The method includes providing a sound absorbing layer that is a blended mixture of an aggregate, granulated rubber, chemically treated wood particles, cement, pozzolans, water, air entraining admixture, and water reducing mixture; placing the sound absorptive layer ingredients in a form mold; compressing the ingredients to a preset density; backing the compressed ingredients with reinforced structural concrete; and curing the backed and compressed ingredients.

Abstract: A method for producing a lightweight, sound insulating covering (1, 1?, 1?, 1??) for a body component of a motor vehicle, in particular a lightweight dashboard covering, wherein the covering (1, 1?, 1?, 1??) is produced as a foamed, sound absorbing molded part in a single-stage operation by injecting a reactive mix, comprising polyol and isocyanate, into a cavity (11) of a foaming tool (9), wherein before and/or during the injecting, at least one predetermined surface portion (17), defining the cavity (11) of the foaming tool (9), is temperature-controlled in such a manner that the foamed molded part comprises an integral substantially pore free skin (1.1) with a thickness of at least 0.5 mm on one side, and comprises an open porous surface (1.2) and/or a thinner, sound permeable skin (1.4) on its side opposite to said skin (1.1).

Abstract: An acoustic treatment panel includes two portions with edges spaced in one direction, and from the outside to the inside, a first acoustically resistive layer, a first alveolar structure, and a reflective layer, and a block inserted between the two edges which includes, from the outside to the inside, a second acoustically resistive layer arranged at the first acoustically resistive layer and a second alveolar structure. The block includes at least one sector of alveolar structures with sloped pipes whose height is less than that of the first alveolar structure, whereby the pipes are sloped in a direction such that the ends of the pipes are close to one of the edges of the portions at the first acoustically resistive layer, and the opposite ends of the pipes are moved away from the edge and the reflective layer so as to house connecting elements between the block and the panel.

Abstract: A noise and vibration mitigating mat having top and bottom surfaces comprises a first layer formed of recycled bound rubber product, the first layer having a contoured bottom surface and a generally flat top surface, a second layer on the top surface of the first layer, the second layer being formed of a fabric and a third layer on the second layer and being formed of recycled rubber product.

Abstract: A monolithically fabricated sound absorbing structural precast concrete noise barrier panel comprising a sound absorbing layer of specialized raw materials. The raw materials include wood particles as well as granulated rubber.

Abstract: Sound muffling flooring underlay tile systems using sonic foam-enhanced underlay board may comprise a sound-muffling tile assembly for installation underneath a floor surface to help minimize sound transfer between living areas and to provide increased insulation. The sound-muffling tile assembly may comprise a flooring base member, a cushioning film layer, and a fastener for securing the flooring base member to the cushioning film layer. In one embodiment of the present invention, the cushioning film layer may comprise a foam substance comprising an open-cell structure. In addition to actively dampening sound waves that travel through the open-cell structure of the foam substance, the cushioning film layer provides a floated surface for the floor above the sound-muffling tile assembly when installed.

Abstract: An exterior acoustic louvre comprises a louvre body which defines major upper and lower surfaces and minor side surfaces. The louvre body includes a support element, a sound-energy absorption element supported by the support element, and a flexible plastics watertight element which watertightly encases the sound-energy absorption element. The louvre body is arranged so that the watertightly encased sound-energy absorption element can receive sound energy in the directions of both the upper and lower major surfaces of the louvre body.

Abstract: The objective of the present invention is to efficiently and inexpensively mass-produce a sound insulator for a vehicle which is light in weight and has excellent sound insulating properties. For this purpose, the ultra-light sound insulator of the present invention is composed of a felt single sheet 3 having a vehicle interior side surface 1 and a vehicle exterior side surface 2 and being thermoformed of cotton fibers and binder fibers which are tangled and contacted and jointed to each other in a random manner. The ratio of the stiffness of the vehicle interior side surface 1 to that of the vehicle exterior side surface 2 is set to be in a range of 1.1 to 10. The single sheet 3 also has an area of gradually-decreasing stiffness 4 that spreads over at least one part of the area between the vehicle interior side surface 1 and the vehicle exterior side surface 2.

Abstract: A support membrane designed to be arranged with a covering that can be applied to bearing areas such as floors or even under and on concrete screeds for a floor is provided. Said membrane can also be used in the composition of ceilings and in the composition of residential walls. The membrane includes a base layer made of fibers and designed to be arranged directly on the bearing area so as to absorb sound waves and to level the irregularities of the bearing area, a vapor barrier-anchoring membrane, and optionally an underlay designed to receive the covering and provide an anchor for the finishing products. Said support membrane is characterized in that the vapor barrier-anchoring membrane thereof is applied in liquid form by hot-melting directly on the base layer and on the underlay whenever the latter is used.

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: The invention relates to a sound insulating element for the ceiling area of a building, in particular for rooms subject to increased humidity such as underground parking, and basement rooms, which sound insulating element consists of an insulation element (2) made from mineral fibers bound with a binding agent and having two mutually spaced large surfaces extending parallel to each other, and of a coating (5) from a hydraulically and/or chemically set mass, wherein the coating (5) is connected to the insulation element (2), whereby the coating (5) to be oriented towards the room includes an array of openings (7) forming a regular hole pattern and penetrating the coating (5) as far as to the insulation element (2). The invention moreover relates to a process for producing said sound insulating element.

Abstract: Sound absorbing or attenuating laminate flooring materials are provided, which are directed to be used in the production of floor covering, floor panels, furniture panels, cabinets, counter-tops and wall panels. As well, the methods for producing such products are provided. In particular, abrasion resistant panels, with a laminated structure, created by forming an assembly which consists of laminating a heat-activated resin impregnated paper wear layer, a decorative layer with printed graphics or a wood veneer decorative layer, a medium density (MDF) or high-density (HDF) natural fiber-based core and a resin impregnated paper balancing layer. To achieve sound absorbing and/or attenuating properties, any or all paper layers may be pre coated with an additional flexible elastomeric coating, film or material prior to assembly of the panel, or the natural fiber core panel may be coated with a flexible elastomeric coating, film or material prior to assembly with the papers.

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 method for producing a lightweight, sound insulating covering (1, 1?, 1?, 1?) for a body component of a motor vehicle, in particular a lightweight dashboard covering, wherein the covering (1, 1?, 1?, 1?) is produced as a foamed, sound absorbing molded part in a single-stage operation by injecting a reactive mix, comprising polyol and isocyanate, into a cavity (11) of a foaming tool (9), wherein before and/or during the injecting, at least one predetermined surface portion (17), defining the cavity (11) of the foaming tool (9), is temperature-controlled in such a manner that the foamed molded part comprises an integral substantially pore free skin (1.1) with a thickness of at least 0.5 mm on one side, and comprises an open porous surface (1.2) and/or a thinner, sound permeable skin (1.4) on its side opposite to said skin (1.1).

Abstract: A laminated acoustic building panel comprises a pair of plasterboard substrates (10,13) which are bonded together by an adhesive layer (16), the panel having a dynamic Young's modulus of 0.1 to 5 GPa and a damping loss factor of 5-30% (?=0.05-0.3), and the ratio of the adhesive (16) to the applied surface area of the substrates (10,13) being 80-250 g/m2. The laminated panel is relatively soft in construction and hence sound waves caused by knocking or impact noise is surprisingly damped using considerably less adhesive (16) than known panels. The use of soft substrates (10,13) and less adhesive (16) significantly reduces the weight of the panel. Furthermore, the use of less adhesive (16) significantly reduces costs and makes production easier.

Abstract: A composition and process suitable for making acoustic tiles are disclosed. Certain embodiments of the composition comprise: perlite; inorganic material selected from the group consisting of calcium sulfate, calcium carbonate, clay and mixtures thereof; a binder selected from the group consisting of starch, a combination of starch and cellulosic fibers, latex, kraft paper gel and mixtures thereof; optionally mineral wool; optionally gypsum; and cellulosic fiber, wherein at least a portion of the cellulosic fiber and at least a portion of the inorganic material are pulp and paper processing waste comprising cellulosic fiber, clay and calcium carbonate. Certain embodiments of the process comprise: forming an aqueous slurry; continuously flowing slurry onto a moving foraminous wire to form a cake; dewatering the cake to form a base mat; and drying the base mat.

Abstract: Prepare an acoustical polymeric foam by providing at least two initial polymeric foams, perforating all the way through the initial polymeric foams and then laminating the perforated initial foams together such that a perforated surface of one foam adheres to a perforated surface of an adjoining perforated initial foam.

Abstract: The present invention relates to a thermal and/or sound insulation system with resistance to elevated as well as low temperatures comprising at least one inner layer (A) obtained from temperature invariant and/or temperature resistant material as decoupling layer, at least one layer (B) as intermediate temperature gradient layer comprising temperature invariant and/or temperature resistant material, and at least one outer layer (C) as insulation layer comprising an expanded polymer blend, the process for manufacturing of such a system and the use of such system.

Abstract: A sound absorbing material comprising a nonwoven fibrous acoustic insulation material and a flow resistive non-woven facing, wherein the flow resistive nonwoven facing is bonded to the insulation material and has an air flow resistance of from about 600 to about 1800 Rayls and a surface mass of from about 20 to about 150 g/m2.

Abstract: A domestic appliance, in particular a domestic dishwasher, includes at least one component, and at least one noise-deadening and/or sound-insulating coating applied on the component. The noise-deadening and/or sound-insulating coating includes or is made entirely of a reactively cured bituminous mixture. The component can be a wall section for delimiting a rinsing chamber of the dishwasher, or can be a base tray of a rinsing container of the dishwasher.

Abstract: It is disclosed an anti-noise panel comprising a front shell and a rear shell that are coupled together within which rubber elements of specifically designed shape and size are incorporated. Said panel can be advantageously obtained by using also recycled, injected thermoplastic material, that allows the resulting panel to be conveniently used when the wind causes strong impact, for example, along railway lines where the compression waves generated by trains traveling at high speed over time tend to disassemble the riveted aluminum/steel sound barriers currently in use.

Abstract: The present invention relates to a floating noise reduction system for moving and/or falling fluids, the process for manufacturing of such system and the use of such system.

Abstract: An uncured acoustic absorbing member (1, 31) for cavity sealing comprises a thermally inert carrier (8, 38) and a thermally expandable material (6, 40) applied to the carrier. The carrier (8, 38) contains openings (3, 33) which become covered when the thermally expandable material is expanded to seal the cavity. The acoustic absorbing members (1, 31) are particularly useful for sealing automotive cavities to provide acoustical abatement and to prevent the entry of fluids into the cavity.

Abstract: An acoustic attenuation system and a method for attenuating or isolating vibration, including one or more multilayer laminate sheets having at least one rigid layer and at least one soft layer. The rigid layer may contain urethane foam, fibrous material and optionally other fillers, while the soft layer may be made of open or closed cell polymeric foam. The attenuation system includes the laminate sheets in place of or in addition to building partition materials such as flooring, drywall, and the like. In addition, the laminate sheets may be used to isolate vibration from transferring beyond objects, for example amplifiers, speakers, musical instruments and mechanical equipment located on surfaces or floors. Further, the laminate sheets may be used as exercise boards to protect the joints of the exerciser as well as isolate vibration created during physical training on the board.

Abstract: An acoustic panel includes a main body portion having a substantially planar front surface for orientation toward a sound source and an opposite, substantially convoluted rear surface. An airflow-resistive layer of material is secured to the planar front surface in face-to-face contacting relationship. The airflow-resistive layer of material may have a specific airflow resistance of between about 50-20,000 mks rayls, and may be configured to attenuate sound at one or more predetermined frequencies. A depth of convolution of the rear surface is between about forty percent to about seventy-five percent (40%-75%) of a thickness of the main body portion.

Abstract: Described is an acoustic face comprising a solid polymer resin and coarse aggregates embedded within the solid polymer resin, and an acoustic panel assembly comprising at least one frame with a central opening in which a pair of the acoustic faces are mountable in opposed and spaced-apart relation to each other. The coarse aggregates of the acoustic face and panel assembly enable the acoustics to benefit highly from the mass law, efficient manufacturing and cost savings on materials.

Abstract: A sound insulator, including an assembly of connected particles, wherein the connected particles include particles adjacent to one another that are adhered to one another. The particles that are adhered to one another include particles of random shapes and random sizes and having respective diameters falling within a range from about a quarter of a millimeter to about four millimeters. The particles that are adhered to one another are adhered such that they form a sound suppression blanket.

Abstract: An acoustic reflector is described comprising a shell around a core, in which portions of the shell are capable of transmitting acoustic waves incident on the shell into the core to be focused and reflected from an area of the shell located opposite to the area of incidence of the acoustic waves to provide a reflected acoustic signal output from the reflector. Incident acoustic radiation will be differentially reflected depending on the portion of the reflector on which the incident acoustic radiation impinges.

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: A lightweight cast article that is made by the method of the present invention. A foamed acoustical product is prepared by blending a starch with cold water, then heating the starch/water blend to form a starch gel. Mineral wool is added to the starch gel to form a pulp and the pulp is wet-mixed until wool nodules are formed. The pulp is then combined with a surfactant and an amount of foam water. The foaming agent is selected from the group consisting of a linear sodium dodecylbenzene sulfonate, a cocamidopropyl betaine, a cocamidopropyl hydroxysultaine, their salts and mixtures thereof. Mixing of the foaming agent and pulp continues to form a foamed pulp. The foamed pulp is cast into a mold and allowing the foamed pulp to dry forming a foamed product. The foamed product is removed from the mold.

Abstract: A lightweight cast article that is made by the method of the present invention. A foamed acoustical product is prepared by blending a starch with cold water, then heating the starch/water blend to form a starch gel. Mineral wool is added to the starch gel to form a pulp and the pulp is wet-mixed until wool nodules are formed. The pulp is then combined with a surfactant and an amount of foam water. The foaming agent is selected from the group consisting of a linear sodium dodecylbenzene sulfonate, a cocamidopropyl betaine, a cocamidopropyl hydroxysultaine, their salts and mixtures thereof. Mixing of the foaming agent and pulp continues to form a foamed pulp. The foamed pulp is cast into a mold and allowing the foamed pulp to dry forming a foamed product. The foamed product is removed from the mold.

Abstract: Prepare an acoustical polymeric foam by providing at least two initial polymeric foams, perforating all the way through the initial polymeric foams and then laminating the perforated initial foams together such that a perforated surface of one foam adheres to a perforated surface of an adjoining perforated initial foam.

Abstract: A damping material (11) in accordance with the invention consists of a ground material that is composed of fibers that are in loose connection with each other. For example, the fibers are minimally interlooped with each other or also glued to each other. This ground material is condensed in some areas in that the fibers are reoriented or interlooped with each other to a greater degree or glued to each other. Consequently, zones (17) and (18) of different densities are formed, thus making it possible to increase and adjust, as desired, the sound-damping effect of the damping material.

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 composite headliner material allows sound waves originating within a vehicle to penetrate deeply into the headliner where all of a significant portion of their energy is absorbed rather than reflected back into the vehicle. The coverstock sheet is backed by a multilayer material with a foam core coated above and below by a fibrous glass mat impregnated with an adhesive with scrim layers above and below glass mat layers.

Abstract: The object of the present invention is to provide a sound absorbing material having a light weight and excellent sound absorbing performance, and a sound absorbing material consisting of a fiber sheet made of fibers containing at least 50% by mass of a porous fiber having many minute pores, each minute pore opening onto the surface of the porous fiber, and having an airflow resistance in the range of between 0.05 and 3.0 kPa·s/m. The porous fiber having many minute pores, each one opening onto the surface of the porous fiber, has air-permeability, and so a sound absorbing property in itself, and a sheet made of the porous fiber having air-permeability and sound absorbing property has even further sound absorbing properties created by the spaces between the porous fibers, resulting in the sheet becoming a sound absorbing material with extremely great sound absorbing efficiency.

Abstract: A hybrid sound absorbing sheet, comprising a microperforated film and a perforated metal foil disposed on the microperforated film, is provided. Also provided is a hybrid sound absorbing sheet comprising a microperforated film and a perforated metal foil disposed on the microperforated film, wherein the perforated metal foil is embossed.

Abstract: A sound muffling material for use in combustion engine exhaust mufflers is provided. The material includes volumized fibers retained in compressed form by a material of lower softening temperature than the fibers. When the material is heated by exhaust gases, the material of lower softening temperature is softened allowing the compressed fibers to expand. The fibers may be formed into a knitted fabric retained by a sacrificial thread. The material may be used to support catalyst bricks.