Abstract: The disclosure relates to acoustic panels and methods for preparing them. The disclosure relates more particularly to panels having a porous facing and to methods for making such panels. One aspect of the disclosure is an acoustic panel comprising a base structure. The base structure has one or more edges, an outward major surface having a total area, and an inward major surface opposing the outward major surface. The base structure has a noise reduction coefficient (NRC) of at least about 0.3. The panel includes a coating layer directly disposed on the outward major surface of the base structure, the coating layer being formed of an open-cell foam. The coating layer has an exterior major surface opposing the outward major surface of the base structure. The coating layer is substantially scattering for light in the wavelength range of 380 nm to 780 nm, and has an absorption coefficient of less than 0.5 for acoustic frequencies in the range of 100 Hz to 10,000 Hz.

Abstract: A porous composite sound-absorbing material and a method for preparing the same are provided. The porous composite sound-absorbing material includes activated carbon cotton felt, zeolite particles, and an adhesive. The activated carbon cotton felt can bond the zeolite particles to fiber surfaces thereof by means of the adhesive, so that the zeolite particles are evenly dispersed and fixed and achieve optimal sound absorption performance. Meanwhile, a large number of micro-pore structures on surfaces thereof can act synergistically with the zeolite particles, so that the porous composite sound-absorbing material has significantly better sound absorption performance than the two and has extremely high cost performance. During the preparation process, the activated carbon cotton felt after treatments, is successfully compounded with the zeolite particles with more excellent sound absorption performance, so that the sound absorption performance is significantly improved and the cost performance is extremely high.

Abstract: There are provided a side panel constituting a vehicle side face at a higher level than a damper attachment portion suspending a rear wheel, a retractor fixed to a cabin-inside face of the side panel, a frame member forming a closed-cross section extending vertically in corporation with the side panel, and a reinforcing member fixed to the side panel. The reinforcing member comprises a retractor attachment portion to attach the retractor, a gusset portion to partition the closed-cross section of a C pillar reinforcement vertically, and a vibration-damping joint portion joined to the side panel via a vibration-damping material. Herein, the reinforcing member is formed integrally by a member which is configured to be continuous over a range of the retractor attachment portion, the gusset portion and the vibration-damping joint portion.

Abstract: A bullet resistant security fence is formed by a plurality of horizontally oriented formed metal panels extending between I-beam support posts. Each panel can be an extrusion having a hollow void for insertion of optional insert modules to enhance the bullet resistant capability. The insert module can be formed as a sandwich with alternating layers of metal sheeting and furniture grade plywood, screwed together to create an integral module. Each panel extrusion includes a tongue and groove interlocking configuration to resist penetration of the fence between metal extrusions. Construction is accomplished by stacking the metal extrusions between spans of adjacent support posts and securing the metal extrusions with a cap, which can include a louvered topper for the fence. Crash protection can be obtained by running cables through the voids in the lowermost extrusions and holes drilled through the support posts, and anchoring the cables at opposing ends thereof.

Abstract: A process for the production of a mineral foam includes separately preparing a slurry of cement and an aqueous foam, wherein the cement slurry includes water and Portland cement as well as calcium silicate hydrate crystallization seeds; contacting the slurry of cement with the aqueous foam to obtain a slurry of foamed cement; and casting the slurry of foamed cement and leave it to set.

Abstract: The present application provides a sound adsorbing material, including a microporous material and an adsorbate gas adsorbed in the microporous material. The microporous material includes a zeolite molecular sieve, and the zeolite molecular sieve has a framework and extra-framework cations. An adsorption capacity of the adsorbolite molecular sieve to the adsorbate gas is greater than an adsorption capacity of the adsorbolite molecular sieve to air. The present disclosure further provides a speaker box adopting the sound adsorbing material. Compared with the related art, the sound adsorbing material provided by the present disclosure has good application effects, and the speaker box using the sound adsorbing material has a better low frequency acoustic performance.

Abstract: In an aspect, provided are methods, systems, and apparatuses comprising receiving a query specifying one or more materials of a floor/ceiling assembly and/or a classification or result, determining one or more media files responsive to the query, and providing the one or more media files for playback.

Abstract: An acoustic shield for protecting a vibrational sensitive device includes a first unit cell and a second unit cell. The first unit cell includes a first locally resonant unit. The first locally resonant unit controls a first phase gradient and the first unit cell includes a first surface. The second unit cell includes a second surface proximate to the first surface. The second unit cell includes a second locally resonant unit embedded along the second interface. The second locally resonant unit controls a second phase gradient. The first phase gradient is different from the second phase gradient. The first unit cell and the second unit cell comprise a super cell. The acoustic shield is configured such that a vibrational wave from a first side of the super cell to a second side of the super cell is substantially attenuated.

Abstract: The mechanical properties and thermal resistance of a sintered component made from an Al—Cu—Mg—Sn alloy powder metal mixture can be improved by doping the Al—Cu—Mg—Sn alloy powder metal mixture with a silicon addition. Silicon is added as a constituent to the Al—Cu—Mg—Sn alloy powder metal mixture. The Al—Cu—Mg—Sn alloy powder metal mixture is compacted to form a preform and the preform is sintered to form the sintered component.

Abstract: Floor panel with a substrate, including thermoplastic material, a decor provided thereon, and, on at least one pair of opposite edges, coupling parts realized at least partially from the substrate. The coupling parts allow to effect a mechanical locking between two of floor panels, where the substrate includes a rigid substrate layer of thermoplastic material, and a glass fiber layer is present in the floor panel.

Abstract: A vehicular speaker temperature control device may include: a sensing unit configured to sense a temperature of a vehicle; an amplifier unit configured to amplify a sound of the vehicle; a speaker unit connected to the amplifier unit and configured to output the amplified sound; and a controller in operable communication with the sensing unit and the amplifier unit. The controller may receive a current temperature of the vehicle measured by the sensing unit, to determine whether the current temperature of the vehicle is less than or equal to a preset reference temperature, and when the current temperature of the vehicle is less than or equal to the preset reference temperature, to control operation of the amplifier unit so as to cause an increase in temperature of the speaker unit by applying a driving signal of a specific frequency to the speaker unit.

Abstract: Disclosed are a sound absorbing and insulating material and a method for manufacturing the same. The sound absorbing and insulating material may be manufactured by impregnating a polyimide binder into a nonwoven fabric formed of a heat-resistant fiber. As such, the sound absorbing and insulating material may have superior sound-absorbing property, flame retardancy, heat resistance and heat resistance, thus being applicable to parts maintained at high temperatures of 300° C. as well as at room temperature and moldability due to the use of the polyimide binder.

Abstract: A muffler for an exhaust system includes an exhaust gas duct pipe (20) and a wall (26). The wall (26) is connected to the exhaust gas duct pipe (20) in a first connection area (24) thereof by a thread meshing.

Abstract: A roof cover board made from a mixture of 30-60% stucco; 20-50% perlite; 10-30% cellulose fiber; 3-20% starch; and siloxane. Also disclosed is a stucco-free roof cover board made from a mixture of 30-60% perlite, 30-60% cellulose fiber, 5-25% starch; and siloxane. Also disclosed are methods for making same.

Abstract: An acoustical tile including: 8 to 25 wt % mineral wool, 9 to 15 wt % starch binder, 9 to 15 wt % cellulosic fiber, wherein preferably the cellulosic fiber is newsprint, and 40 to 65 wt % perlite, wherein the weight ratio of the starch to the cellulosic fiber is 0.6 to 1.3:1; and a process for making the acoustical tile.

Abstract: An asphalt damping sheet, which comprises the following components in indicated amounts based on the total mass of the asphalt damping sheet: a paint slag-containing waste limestone powder 20-50 parts; soft pitch 1-5 parts; hard pitch 11-15 parts; a non-metallic mineral 29-59 parts; PET short fiber 0.1-1.5 parts; and said non-metallic mineral is selected from the group consisting of quartz sand, pottery clay and mica powder. The technical process in the invention uses the paint slag-containing waste limestone powder generated in dry separation process of overspray adopted by vehicle manufacturer paint shops as filler in the asphalt damping sheets, such asphalt damping sheets can be used in the field of machine manufacturing such as automobiles and ships, and also can be used in the field of building waterproof materials, and the goal of resource recycling is achieved.

Abstract: Embodiments of thermal-acoustic sections for an aircraft for reducing noise along an acoustic path produced from an acoustic source are provided herein. The thermal-acoustic section comprises a first porous layer having a first characteristic acoustic impedance. A second porous layer is disposed adjacent to the first porous layer and has a second characteristic acoustic impedance that is greater than the first characteristic acoustic impedance. The thermal-acoustic section is configured to be positioned along the acoustic path such that at least a portion of the noise from the acoustic source is directed through the first porous layer to the second porous layer to promote absorption of the noise.

Abstract: An acoustic damping article includes a substrate, wherein the substrate has a surface area S. The acoustic composition further includes a polymer resin. The polymer resin coats partially the surface area with a set of areas. The ratio of the coated areas over the surface area S is less than 1 and the polymer resin coverage is not greater than about 500 g/m2.

Abstract: The present invention includes a moldable, flame retardant acoustical fiber system including a nonwoven, moldable layer of a blend of fibers, with a flame retardant coating applied on both top and bottom sides of the moldable layer. The system also includes a spun bond nonwoven black surface adhered to the flame retardant coating on one side of the nonwoven layer. The moldable, flame retardant acoustical fiber system is configured to meet the UL 94 V-0 flame test standard.

Abstract: A sound absorbing material comprising a nonwoven fibrous acoustic insulation material and a flow resistive nonwoven 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: The application provides a thermo-acoustic protection structure for a rotating machine. The thermo-acoustic protection structure includes an upper wall and a parallel lower wall, and between them is placed at least one acoustic absorbent material. The upper wall and the lower wall being connected with at least one connecting element of an extended form. The connecting element presenting, in transverse section, at least one portion, curved or rectilinear, that is non-orthogonal to the two walls. A length of the connecting element between the upper wall and the lower wall is greater than a distance between the upper wall and the lower wall. The connecting element further presents in transverse section at least one edge.

Abstract: There is provided a sound absorbing member lamination structure in which the functions by the sound field adjustment can effectively be achieved by preventing the sound reflection against an intension of design in a boundary between the sound absorbing member and the other layer, when the sound absorbing member and the other layer are laminated into a united body. When the sound absorbing member and the other layer are placed in a stacked state, they are bonded with the use of a pressure-sensitive adhesive, so that the sound absorbing member and the other layer are combined together, with the pressure-sensitive adhesive kept uncured in a stacked state of the sound absorbing member and the other layer. Thus, such an uncured pressure-sensitive adhesive does not become a reflection portion of a sound. It is therefore possible to cause the sound to pass through appropriately the boundary between the respective layers.

Abstract: An acoustic device is provided with an outer casing comprising a molded article which is made of a resin composition having a loss factor of 0.04 or more, the resin composition comprising a resin component comprising poly(lactic acid) and/or a lactic acid copolymer in an amount of 50% by weight or more, and at least an inorganic filler, a hydrolysis inhibitor, and a plasticizer.

Abstract: The invention relates to a motor vehicle part material structure for sound insulation for the motor vehicle interior and motor vehicle trunk, namely floor mats floor coverings, and trunk linings, that makes it possible to industrially implement complete reprocessing of the entire composite, in particular the fiber material. The motor vehicle part has a PIT fiber layer, an optional substrate layer made of PET and/or COPET, an optional PET adhesive layer, a PET adhesive layer, a layer made of PET fiber nonwoven & brie or woven fabric, and an insulating layer made of PET/COPET.

Abstract: Disclosed is a highly heat resistant sound absorbing material for a vehicle capable of maintaining a shape even at high temperatures of about 200° C. or above and which satisfies UL 94V-0 flame retardancy. More particularly, the a highly heat resistant sound absorbing material includes a fiber material having a limiting oxygen index (LOI) of at least about 25% and capable of maintaining a shape at a temperature of about 200° C. or above, and a thermosetting binder resin capable of maintaining a shape at a temperature of about 200° C., wherein the fiber material and thermosetting binder resin are provided at a specific proportion.

Abstract: A utility material can include microparticles, an organic binder and an inorganic binder. The microparticles can be present in an amount from about 25 wt % to about 60 wt %, based on wet formulation. The inorganic binder can optionally include sodium silicate. The organic binder can optionally include a vinyl acetate. The utility material can be formed into a variety of different products or building materials, such as wallboard, shear panels. In addition, the building material may be particularly used to attenuate sound.

Abstract: A sound absorbing board (1) that is a sound absorbing board where a decorative layer (2) and a rigid substrate material (3) are laminated, and where the substrate material contains parallel grooves (4) spaced at a pre-determined distance, and also, where the cross sectional surface of the grooves in a direction perpendicular to the longitudinal direction of the substrate has a shape that contains mutually adjacent neck parts (4a) and trunk parts (4b) is described. The sound absorbing board has decorative properties and at the same time has sound absorbing, sound isolation properties, and can be easily processed.

Abstract: A sound-damped insulating glazing is described. The glazing has a first pane and a second pane, a peripheral spacer between the first pane and the second pane, an externally encircling seal in a gap between the first pane, the peripheral spacer and the second pane, a vacuum insulating panel between the first pane, the second pane and the peripheral spacer, and at least one acoustic insulating plate is arranged on at least one surface of the vacuum insulating panel.

Abstract: A method of manufacturing a liner, such as a wheelhouse liner, includes the following steps: (a) providing a textile blank; (b) dispensing a liquid-impermeable polymer only on a portion of the textile blank; (c) bonding the liquid-impermeable material to the textile blank; (d) changing a shape of the textile blank to form the liner; and (e) trimming the liner. The liner includes a substrate wholly or partly made of a textile. The substrate has a first surface and a second surface opposite the first surface. The liner further includes a liquid-impermeable coat bonded to the substrate. The liquid-impermeable coat partially covers the first surface of the substrate in order to minimize liquid flow through the substrate.

Abstract: A supercharger system for a vehicle engine comprises a supercharger and a sound isolation unit at least partly surrounding the supercharger. The sound isolation unit comprises an inner layer facing the supercharger, a sound barrier layer facing away from the supercharger and a core there between. All three layers are made from polyurethane but with different densities. Furthermore, the core comprises an open cell structure for sound absorption.

Abstract: Gypsum plasterboard is produced by combining calcium sulphate hemihydrate (stucco) with water to form an aqueous slurry. Uncalcined gypsum having a specific surface area below 0.3 m2/g is added to the slurry and the slurry is discharged onto a support so as to form a sheet of gypsum plasterboard.

Abstract: This invention is directed to a multilayered sheet comprising a release paper and an inorganic refractory layer coated onto one surface of the release paper wherein the refractory layer has a dry areal weight of from 15 to 50 gsm and a residual moisture content of no greater than 10 percent by weight. The paper comprises a blend of cellulose and cotton fibers and is hydrophilic.

Abstract: A soundproof panel connection structure including: a plurality of posts spaced apart from each other on the floor by a given distance; a plurality of soundproof panels each located between the neighboring posts and having fastening portions disposed on both end portions thereof; bending portions each extended from one side surface of each soundproof panel; soundproof materials each interposed between each fastening portion and each bending portion in such a manner as to be supportedly brought on one surface thereof into contact with one side surface of each post; and a plurality of connection joints each coupled on both ends thereof to the fastening portions disposed on both side surfaces of each post, wherein the post located at the corner portion in the plurality of posts has supports located at the outer surfaces thereof.

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: Building materials include a dampening layer which contains a plaster and a viscoelastic polymer, such as polyvinyl butyral. The dampening layer may also include a barium salt. Methods of making a sound dampening material include providing a plaster mixture. The mixture may include a viscoelastic polymer and/or a barium salt. The plaster mixture is combined with water and/or a viscoelastic polymer dispersion, to form a slurry. The slurry is applied to a surface and set to form a sound dampening layer.

Abstract: An ostomy appliance includes a sound absorbing film comprising a triblock copolymer including polystyrene blocks and vinyl-bond rich rubber mid-block, and a sound absorbing non-woven material comprising the triblock copolymer including polystyrene blocks and vinyl-bond rich rubber mid-block. The ostomy appliance has improved sound absorbing properties to insulate flatulence noise.

Abstract: An acoustic insulator for a motor vehicle is provided comprising a mass providing an acoustic barrier and a spring providing an acoustic absorber overlying the mass. The mass comprises a first acoustic mass layer underlying a second acoustic mass layer. The first acoustic mass layer is provided by a thermoplastic sheet having a thickness in a range of 0.5 mm to 1 mm. The second acoustic mass layer is provided at one or more localized areas formed in place on a backside surface of the first acoustic mass layer to increase an overall thickness of the mass at the one or more localized areas. The spring layer is formed in place on a backside of the second acoustic mass layer and the backside of the first acoustic mass layer.

Abstract: A liquid absorber that is constituted mainly by fibers, includes fusion bondable resin, and is configured to absorb liquid, includes a first surface having a largest surface area, and a second surface perpendicular to the first surface. The second surface includes a surface low in degree of fusion bond of the fusion bondable resin and a surface high in degree of fusion bond of the fusion bondable resin that has a higher degree of fusion bond of the fusion bondable resin than the surface low in degree of fusion bond, and at least a part of the surface low in degree of fusion bond absorbs the liquid.

Abstract: The open air layer-type vibration reduction structure is provided with at least one plate-like member of which the obverse surface faces toward the open space side; and a frame spaced at an interval from the reverse surface of the plate-like member, and an air layer is formed between the plate-like member and the frame. An air-permeable ventilation portion is formed at least one of the plate-like member and the frame, such that the average value of the flow resistance on the surface of at least one of the plate-like member and the frame, which forms an air layer, is in a range greater than 0 N·s/m3 and equal to or less than 1,000 N·s/m3. The ventilation portion may be configured such that the sound pressure level generated within the air layer by applying an external force to the air layer is reduced by 3 dB or more.

Abstract: The present invention relates to an assembly wall having improved sound absorption/insulation performance and an assembly structure thereof. The assembly wall includes plate members separated from each other to face each other and each forming at least one layer; stud members alternately placed on different inner surfaces of the plate members and comprising a web formed with a plurality of first perforated holes having at least one diameter; an insulation member interposed in a space defined between the plate members and the stud members; and a sheet member adjoining an outer surface of the insulation member and being formed with a plurality of second perforated holes having at least one diameter. With this structure, the assembly wall has excellent sound absorption and insulation performance over various frequency bands including a low frequency band without increasing wall thickness.

Abstract: A sound insulating material is obtained by foaming a rubber composition containing an ethylene-propylene-diene rubber. The content ratio of a sulfur atom calculated by a fluorescent X-ray measurement, based on mass, is 1000 ppm or less. The sound insulating material has a 50% compressive load value of 0.1 N/cm2 or more and 10 N/cm2 or less. The sound insulating material has an air permeability of 10 cm3/min/cm2 or less.

Abstract: A sound transmission, material is made of fibers entangled with each other and has a self-standing property and a high performance sound transmission property, namely the Taber stiffness is not less than 5 mN·m, the bending resistance is not less than 100 mN, the porosity is not less than 50%, and the thickness is not more than 3 mm.

Abstract: A sound absorbent barrier has a sound absorbent layer disposed between a porous first cover and a second cover. The barrier also has a waterproof sound-permeable membrane between the first cover and the sound absorbent layer. The sound absorbent layer is thus protected from damage by the first and second covers and water ingress is prevented by the sound permeable membrane. The second cover may be non-porous to reflect sound waves which have passed through the sound absorbent layer back through the sound absorbent layer. Alternatively, the second cover may be porous to enable absorption of sound from two directions.

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: A multilayer composite material is formed of an acoustic core layer and at least one outer strengthening layer. The acoustic composite material has desirable high strength and high flexural modulus properties.

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. hi 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: A method and apparatus comprising a composite panel and a number of structures to reduce noise radiation from the composite panel. The composite panel has a first face sheet, a second face sheet, and a core located between the first face sheet and the second face sheet. The number of structures is associated with the first face sheet. The number of structures has a mass with a configuration to reduce a speed of waves propagating in the composite panel such that noise radiating from the composite panel is reduced.

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: The invention relates to the use of expandable graphite having a starting temperature greater than or equal to 150° C. for increasing the sound absorption within a sound absorption foam material foamed with the expandable graphite, wherein the foam material is a polyurethane foam material. An associated sound absorber having a sound absorption foam material made of a polyurethane integral foam or polyurethane flexible foam, which is open-cell at least in the core region thereof, has a density greater than or equal to 120 g/l and a content of at least 5 wt % of expandable graphite to 100 parts by weight of isocyanate-reactive components, in particular polyol. The sound absorber can preferably be used for sound absorption in engine compartments of motor vehicles. The sound absorber can also be used very advantageously inside relatively complex components and in the design-dependent cavities of machines.

Abstract: Building materials include a dampening layer which contains a plaster and a viscoelastic polymer, such as polyvinyl butyral. The dampening layer may also include a barium salt. Methods of making a sound dampening material include providing a plaster mixture. The mixture may include a viscoelastic polymer and/or a barium salt. The plaster mixture is combined with water and/or a viscoelastic polymer dispersion, to form a slurry. The slurry is applied to a surface and set to form a sound dampening layer.