Abstract: An acoustic system is disclosed. The acoustic system includes a sound absorptive substrate, and a rigid polyester shell configured to be positioned over the sound absorptive substrate. The rigid polyester shell is configured to be mounted on an interior surface of a building such that at least some sound waves pass through the rigid polyester shell. The shell is configured to provide aesthetic features to the acoustic system.

Abstract: A method for producing an alveolar soundproofing structure in which a portion of a membrane of a diaphragm including an acoustic outlet is inserted into a hole of a perforated membrane which covers a cell of the alveolar structure, and the diaphragm is pressed into the cell with the perforated membrane becoming deformed and is fixed at that location. It also relates to the alveolar structure. Such a method enables different types of diaphragms to be inserted into different configurations of cells and enables the diaphragm to be fixed therein, in accordance with the sound frequencies to be processed.

Abstract: The present invention provides a sound-absorbing material having sound absorption performance with an average sound absorption coefficient of 0.70 or more in the frequency range of 800 to 5000 Hz. The present invention provides a sound-absorbing material including: a fiber layer including a plurality of holes open to a surface thereof and having a thickness of 3 mm or more; and an inorganic material layer mainly containing a calcium-based material and having a thickness of 0.4 to 0.6 mm on the surface of the fiber layer, the holes being blind holes each penetrating through the inorganic material layer and having a bottom inside the fiber layer, each hole having a depth corresponding to 50 to 90% of the thickness of the fiber layer.

Abstract: An object of the present invention is to provide a soundproof material having a practically useful high-level sound absorption coefficient that while maintaining thinness, and further having an expanded sound-absorbable frequency region. A means for solving the problem is a soundproof material comprising: a surface cover layer composed of a fiber material; a back-surface layer laminated onto the surface cover layer, and composed of a porous material with voids interconnected with each other; and a joining layer laminated between the surface cover layer and the back-surface layer, and composed of a joining material, wherein the fiber material has an average fiber diameter of 1 to 10 ?m and an air-permeation volume of 5 to 200 cm3/cm2·sec, and wherein the joining layer has a joint area percentage of 50 to 95% with respect to the entire surface where the surface cover layer and the back-surface layer face each other.

Abstract: A structural element forms a motor vehicle dashboard body that is intended to be installed in a transverse installation position inside a vehicle passenger compartment. The structural element has a one-piece openwork structure produced by three-dimensional printing. The openwork structure defines: a first internal passage that passes all the way through the structural element and extends transversely when the structural element is in the installation position. The first passage is shaped so as to receive a crossmember that is in particular bent with a constant radius of curvature and having at least two fastening elements that are intended to be fastened to the crossmember. A second internal passage connects the first passage to a face of the structural element that is directed toward the rear of the vehicle when the structural element is in the installation position. The second passage has at least one fastening element that is intended to fasten a steering column fastening support.

Abstract: A sound insulation material 1 includes a first layer 10 constituted by a polyurethane foam, a second layer 20 that is laminated on a surface of the first layer, the surface being located on a first side, and that is constituted by a sheet-shaped member made from a material other than polyurethane, and a third layer 30 that is laminated on a surface of the second layer, the surface being located on the first side, that is constituted by a polyurethane foam, and that, over its entirety, has a higher density than the density of at least a portion of the first layer.

Abstract: The invention concerns a sound insulation element (10), that utilizes a strong force-network as a principle energy dissipating mechanism, whereat the strong force-network is generated through complex interactions of solid particles (14) in a granular system, which leads to formation of maximal number of interconnecting pairs-of-forces according to 3rd Newton's Law, whereat said strong force-network is realized by using a granular material (12) made from at least one solid material with a specific skewed multimodal particles-size-distribution, comprising a granular material (12) consisting of particles (14), and a supporting structure (40) having at least one cavity (42), whereat the at least one cavity (42) is filled with particles (14) of the granular material (12).

Abstract: There is provided a sound-insulation material for a vehicle that can reduce the weight thereof and exhibit sufficient sound insulation performance against noise of 500 Hz to 6400 Hz generated in vehicles. The sound-insulation material for a vehicle, of the present invention, includes: a core layer having tubular cells, the tubular cells being arranged in a plurality of rows; an airflow-blocking resin film layer provided on one surface of the core layer; and a decoupling layer provided on the airflow-blocking resin film layer; and an average (P/v)/Za is 2.8 to 10 between 500 and 6400 Hz, where: P and v are respectively a sound pressure and a particle velocity on a surface of the airflow-blocking resin film layer provided on the core layer, the surface being opposite to the core layer; and Za is an acoustic impedance of the decoupling layer.

Abstract: The invention provides coating processes for producing finished fibrous panels comprising applying a prime coat onto at least one side of the fibrous panel by curtain coating; and applying a finish coat over the prime coat by spray coating.

Abstract: A suspended ceiling system in one embodiment includes a grid support member and a ceiling panel supported on the member. A resiliently compressible gasket is disposed at the interface between the grid support member and peripheral edge of the panel. The gasket may be fixedly attached to the panel peripheral edge in the factory under controlled conditions before shipment to the ceiling installation site. In one embodiment, the gasket may be adhesively attached to the panel. Mounting the ceiling panel on the grid support member compresses the gasket to preferably form a minimally visible air leakage resistant seal between the air plenum space above the ceiling panels and the occupied space below. This retards air exchange between the spaces which enhances heating/cooling efficiency, noise reduction and allows formation of pressurized clean rooms.

Abstract: A panel including at least a substrate of thermoplastic material and a top layer with a printed decor and a translucent or transparent wear layer. The substrate has a thickness larger than one half of the thickness of the entire panel, and the substrate at least includes two layers, where the two layers each include thermoplastic material. A first one of the two layers further includes at least 60 percent by weight of filler materials and a second one of the two layers includes less fillers or is not filled, and is situated above the first one of the two layers.

Abstract: A face sheet of an acoustic liner for a gas turbine engine, having: a first surface, a second surface, and a sheet body extending from the first surface to the second surface; a forward end, an aft end, and the sheet body extending from the forward end to the aft end; and a hole formed in the sheet body, extending from the first surface to the second surface, the hole defining a hole opening at the first surface of the face sheet, and an elongated edge that extends aft at the hole opening, wherein the elongated edge defines a flow ramp surface that tapers toward the first surface and is configured to direct flow toward the first surface, wherein the flow ramp surface is a streamlining feature.

Abstract: A system for abating noise emanating from a kitchen electric appliance includes a base of a predetermined size, comprising a first instance of a noise reflecting material, so that said base is disposed underneath, supporting, and contiguous to said kitchen electric appliance, and a sleeve of a predetermined size, including a second instance of a noise reflecting material, one or more layers of at least one noise absorbing material, one closed end, and one open end, so that said one open end slides over said kitchen electric appliance and is contiguous to said base. Said noise is effectively abated by reverberating between said first instance of said noise reflecting material and said second instance of said noise reflecting material and is attenuated by said one or more layers of said at least one noise absorbing material.

Abstract: A household appliance has a device housing, a blower arranged in the device housing, an outlet opening formed in the flow direction behind the blower in the device housing, and a flow channel. Soundwaves are generated by the blower, and produce resonances characterized by standing waves, which form between opposing inner walls of the flow channel. A sound reducing wall is positioned in the flow channel, the wall plane of which is oriented parallel to a primary flow direction of the air flow guided in the flow channel. The sound reducing wall is positioned in the flow channel so that a maximum for a fast amplitude of a sound particle velocity of the air flow guided in the flow channel lies in the wall plane of the sound reducing wall. The soundwaves form while interspersing the sound reducing wall between the opposing inner walls of the flow channel.

Abstract: A damping element for a battery/accumulator system is arranged between the battery/battery system and a floor of a motor vehicle.

Abstract: An object of the present invention is to provide a sound insulating sheet member that has high sound-insulating performance which exceeds mass law while being relatively light weight, that is highly flexible in design, excellent in versatility, and easy to manufacture so that productivity and economic efficiency can be improved, and a sound insulating structural body or the like using the same. The object thereof is achieved by using a sound insulating sheet member comprising at least a sheet having rubber elasticity and a plurality of resonant portions, wherein the resonant portions are provided in contact with a sheet surface of the sheet, each of the resonant portions including a base part and a weight part, and the weight part being supported by the base part and having a larger mass than the base part.

Abstract: An acoustic insulation product includes a panel made of porous material, based on foam or fibres, including a first face, referred to as back face, intended to face towards a wall, and a second face, referred to as front face, situated on the opposite side to the back face, and a layer, referred to as backing layer, which adheres to or is linked or coupled at least in part to the back face of the panel made of porous material, the backing layer having an airflow resistance of between 5 kPa·s/m and 20 kPa·s/m.

Abstract: A laminated acoustic absorption member that includes at least a first fiber layer and a second fiber layer, as well as at least one substrate layer present between the first fiber layer and the second fiber layer, wherein: the first fiber layer has an average flow pore diameter of 0.5-10 ?m and a basis weight of 0.1-200 g/m2; the second fiber layer has an average flow pore diameter of 0.5-10 ?m, the average flow pore diameter of the second fiber layer being equal to or less than that of the first fiber layer, and also has a basis weight of 0.1-200 g/m2; the substrate layer has an air permeability of 40 cc/cm2·s or greater as measured by the Frazier method, and a basis weight of 1-700 g/m2; and the first fiber layer and the second fiber layer are disposed on a sound-incidence side and a sound-transmission side, respectively.

Abstract: The present invention provides an automobile sound insulation panel which suitably implements a lightweight sound insulation panel with an expanded sound isolation-target frequency band and improved sound isolation performance. An automobile sound insulation panel includes a first panel member, a second panel member, and an elastic sheet member positioned between the first panel member and the elastic sheet member. The elastic sheet member includes a first projection-recess part. The first panel member abuts on respective upper opening edges of a plurality of recesses that form the first projection-recess part. Individual air layers exist between the second panel member and the elastic sheet member. A continuous air layer exists between the first panel member and the elastic sheet member.

Abstract: Uncured composite structures, cured composite structures, and methods of curing uncured composite structures are disclosed herein. The uncured composite structures include a structural layer that includes an uncured structural resin and a surface layer that includes an uncured surface resin. The cured composite structures include a cured structural layer that includes a cured structural resin, a cured surface layer that includes a cured surface resin, and an interface region between the cured surface layer and the cured structural layer. The methods include initially heating the uncured composite structure to an initial temperature to generate a partially cured composite structure. The initially heating is sufficient to gel the uncured surface resin but insufficient to gel the uncured structural resin. The methods also include subsequently heating the partially cured composite structure to a final cure temperature, which is greater than the initial temperature, to generate the cured composite structure.

Abstract: A noise reduction apparatus can include a frame and multiple spaced apart panels positioned adjacent to each other. Each of the panels or only one of the spaced apart panel elements may have holes therein to receive acoustic waves for absorbing the waves between the panels. The panels can be attached to a frame or other connection structure so that the arrangement of panels can be hung over a work space or positioned in a work space (e.g. in a wall, formed as a partition or wall, included as part of shelving, etc.). The panels can also be incorporated into a light fixture that may hang from a ceiling or be attached to some other type of support (e.g. a table, a base, etc.). The panels can be composed of glass, wood, or other type of material.

Abstract: A secure access kiosk includes a plurality of walls interconnected to form an interior area within the secure access kiosk, a soundproofing element fixed at each wall of the plurality of walls, an electromagnetic shielding element fixed at each wall of the plurality of walls, and an information processing system security container within the interior area of the secure access kiosk. The information processing system security container houses at least one of a thin client or an ultra-thin client, and the thin client or the ultra-thin client is configured to provide a software interface and to prevent data storage or encryption to be stored at the thin client or ultra-thin client. The thin client or the ultra-thin client can include an integrated classified network interface within the interior area of the secure access kiosk.

Abstract: An acoustic curved ceiling baffle and system that incorporates sidewalls with cuts or kerfs, top and bottom spines and ribs to properly configure the curves in the acoustic baffle, and that can be quickly and easily installed onto ceilings using integrated locks, cables or magnets, to produce a curved baffle system, and to provide an aesthetically pleasing image, along with a reduction in unwanted noise and/or room acoustics.

Abstract: An appliance, such as a washing machine appliance, includes a cabinet comprising a wall defining an aperture configured for receiving support features during shipment of the appliance. When the appliance is installed, the support features are removed, leaving the aperture open and creating a path for noise transmission. Therefore, a sound reducing plug is configured for receipt within the aperture, the sound reducing plug being slightly oversized relative to the aperture such that an interference fit is formed between the sound reducing plug and the wall when the sound reducing plug is installed.

Abstract: An improved sound reducing panel is disclosed comprising a front porous sheet for enabling sound to enter into the sound reducing panel and a rear non-porous sheet. A sound absorbing member dissipates sound entering into the front porous sheet. A sound blocking member blocks sound from exiting from the sound absorbing member. A decoupling member reduces sonic vibration from being transferred from the sound blocking member to the rear non-porous sheet. One embodiment includes a drenching shield for inhibiting water from entering the sound absorbing member. Another embodiment includes a decorative or artistic image located on the sound reducing panel.

Abstract: An audio speaker having a speaker housing surrounding a back volume that is divided into a rear cavity behind a speaker driver and an adsorption cavity separated from the rear cavity by a permeable partition, is disclosed. More particularly, the adsorption cavity may be defined between the speaker housing and the permeable partition, and may be directly filled with adsorptive particles to adsorb gas during sound generation. The permeable partition may allow the gas to flow between the rear cavity and the adsorption cavity, and may retain the adsorptive particles within the adsorption cavity. Other embodiments are also described and claimed.

Abstract: An acoustic fiber silencer for a motor vehicle includes a first sound absorbing layer and a second sound insulating layer. The layers are formed of lightweight fibrous material, and the sound insulating layer is quilted. The acoustic fiber silencer includes a frame to which the sound absorbing and sound insulating layers are secured. The frame provides structural support and shape to the sound absorbing and sound insulating layers. The acoustic fiber silencer is lightweight while maintaining excellent noise attenuation properties.

Abstract: The polyurethane material is prepared from a polyol, butanediol, and an isocyanate. The protective cover is adapted to be attached along at least a part of a longitudinal edge of the wind turbine blade by adhesion of an inside of the protective cover to a surface of the longitudinal edge of the wind turbine blade. The protective cover is elongated in a longitudinal direction and has an at least substantially U-formed cross-section. The protective cover includes a central cover section extending in the longitudinal direction and two peripheral cover sections extending in the longitudinal direction at either side of the central cover section, respectively. The central cover section has a minimum thickness of at least 1 millimetre, and each peripheral cover section has a thickness decreasing from a maximum thickness of at least 1 millimetre to a minimum thickness of less than ½ millimetre.

Abstract: A polymer sheet adapted to attach to a material body such as a ceiling of a geological cavity and provide protective cover. The sheet comprises: a webbing portion defining a plurality of primary openings; and two margin portions extending along opposite edges of the sheet on either side of the webbing portion along a length of the sheet, each margin portion defining a plurality of secondary openings, wherein the margin portions are angled relative to the webbing portion.

Abstract: A medical, in particular dental-medical, fan for extracting or compressing a gaseous working fluid, in particular air, comprises a compressor unit with an outer housing, which comprises an inlet opening for the working fluid and an outlet opening for the working fluid, which are fluidically connected to one another, and which defines a compressor sector and a drive sector.

Abstract: A method of forming cured microparticles includes providing a poly(glycerol sebacate) resin in an uncured state. The method also includes forming the composition into a plurality of uncured microparticles and curing the uncured microparticles to form the plurality of cured microparticles. The uncured microparticles are free of a photo-induced crosslinker. A method of forming a scaffold includes providing microparticles including poly(glycerol sebacate) in a three-dimensional arrangement. The method also includes stimulating the microparticles in the three-dimensional arrangement to sinter the microparticles, thereby forming the scaffold having a plurality of pores. A scaffold is formed of a plurality of microparticles including a poly(glycerol sebacate) thermoset resin in a three-dimensional arrangement. The scaffold has a plurality of pores.

Abstract: The present disclosure relates generally to plaster wall panels, for example, suitable for covering interior wall frames. The present disclosure relates more particularly to a plaster wall panel including a first plaster layer, a second plaster layer, and a damping layer disposed between the first and second plaster layers. The first plaster layer has a first thickness and is composed of a first plaster material that has a first material property. The second plaster layer has a second thickness and is composed of a second plaster material that has a second material property. The first thickness is smaller than the second thickness, and the first and second material properties are different.

Abstract: A soundproof member is provided. The soundproof member includes a structural element, and a first composite film which is disposed on the bottom surface of the structural element. The structural member includes at least one through hole and the through hole passes through the structural element. The first composite film includes a polymer material and an inorganic nanoscale material, wherein the inorganic nanoscale material is a one-dimensional inorganic nanoscale material or a two-dimensional inorganic nanoscale material.

Abstract: An acoustic panel for an aircraft propulsion unit, comprises a core and an entry layer in contact with the core, the entry layer comprising lower elements and upper elements, each comprising an inner face, an outer face and at least one through-hole, the inner faces of the lower elements and upper elements being in contact with each other and forming a channel defining a baffle and opening into a cell of the core.

Abstract: The present invention is directed to an acoustical baffle that has use in vehicle interiors, such as an interior headliner. In particular, the baffle can provide improved acoustics while maintaining a desired airflow resistance and can be configured to provide for different sound attenuation characteristics at selected locations of the baffle construction.

Abstract: An acoustic structure includes a plate and at least one acoustic scatterer having a resonant frequency and coupled to a side of the plate. The at least one acoustic scatterer has an opening, a first channel and a second channel. The first channel has a first channel open end and a first channel terminal end with the first channel open end being in fluid communication with the opening. The second channel has a second channel open end and a second channel terminal end with the second channel open end being in fluid communication with the opening. The first channel terminal end and the second channel terminal end are separate from one another.

Abstract: The present invention is directed to an acoustic ceiling panel having a first major exposed surface opposite a second major exposed surface, the acoustic ceiling panel comprising: a first layer having an upper surface opposite a lower surface, the first layer comprising: a first body comprising a first major surface opposite a second major surface and a side surface extending between the first and second major surfaces, the first body being air-permeable; and a first attenuation coating applied to the first body; a second layer having an upper surface opposite a lower surface, the second layer comprising: a second body comprising a first major surface opposite a second major surface and a side surface extending between the first and second major surfaces, the second body being air-permeable; and a second attenuation coating applied to the second body; and an adhesive present between the first and second layers.

Abstract: A surface liner member includes an external wall which is provided with multiple holes, a spacer structure, and tubes which are respectively associated with the holes in the external wall. The surface liner member is intended to be applied to a base surface in order to reduce, by acoustic absorption, an acoustic wave reflected on this base surface. The acoustic absorption efficiency is improved, particularly for frequencies below 500 Hz, by varying the shape of the holes in the external wall such that the ratio of the hole perimeter to the hole area varies. Such a surface liner member may be adapted to form a surface portion of an aircraft engine nacelle, or of a leading edge of an aircraft wing.

Abstract: Disclosed herein is a device for reducing noise using a sound meta-material. The device for reducing noise includes a sound-absorbing layer configured to absorb noise generated from a sound source, a buffer layer configured to buffer an impact, and a meta-material panel layer disposed between the sound-absorbing layer and the buffer layer. The meta-material panel layer is configured with a unit cell formed by stacking one or more block cells, and one or more unit cells are disposed on a plane of the meta-material panel layer.

Abstract: Described herein is an acoustic ceiling panel comprising: a first air-permeable body comprising a first major surface opposite a second major surface and a side surface extending between the first and second major surfaces, the first body having an NRC value of at least 0.5 as measured between the first and second major surfaces of the first body; and an attenuation coating applied to the second major surface of the body and the side surface of the body, whereby the attenuation coating seals at least a portion of the second major surface and the side surface of the body.

Abstract: A propulsion assembly includes a fan and a fan case system disposed about the fan. The fan case system includes at least one perforated portion including a plurality of holes. The propulsion assembly further includes at least one acoustic panel mounted to the exterior surface of the fan case system coincident with the at least one perforated portion. The at least one acoustic panel includes a core including a plurality of cells extending between a first side of the core and a second side of the core. The at least one acoustic panel further includes a back skin attached to the second side of the core. The first side of the core is in contact with the exterior surface of the fan case system to form a plurality of resonant cavities defined by the plurality of holes, the plurality of cells, and the back skin.

Abstract: An acoustic panel is provided that includes a first skin, a second skin and a core structure. The core structure is connected to and forms a plurality of cavities between the first skin and the second skin. The cavities include a first cavity and a second cavity. The first cavity is fluidly coupled with one or more first perforations in the first skin. The second cavity is fluidly coupled with one or more second perforations in the second skin.

Abstract: An insulated exhaust port liner of a cylinder head assembly for fluidly connecting to an internal combustion engine of a motor vehicle includes a sealing layer. The sealing layer has a first surface defining a passage for fluidly connecting to the internal combustion engine and receiving exhaust gas. The sealing layer further includes a second surface opposite to the first surface. The liner further includes a thermal barrier layer coated onto the second surface of the sealing layer. The thermal barrier layer is a porous non-woven material for supporting the sealing layer on the cylinder head and reducing a transfer of heat from the sealing layer to the cylinder head.

Abstract: A vehicle body structure includes a dash panel separating a vehicle front part from a vehicle cabin, a front side member extending longitudinally of a vehicle body in the vehicle front part and having ends located rearward of the vehicle body, opposite to the dash panel, a floor frame member forming a floor frame of the vehicle cabin, and a plate-shape reinforcing member disposed further toward a center of the vehicle cabin with respect to the dash panel and the floor frame member to be opposite to the ends of the front side member. The reinforcing member includes an upper portion secured to the dash panel and a lower portion secured to the floor frame member, and has a curvature that is smaller than a curvature of the dash panel.

Abstract: This invention provides low dust low density gypsum wallboard products having high total core void volumes, corresponding to low densities in the range of about 10 to 30 pcf. The wallboards have a set gypsum core formed between two substantially parallel cover sheets, the set gypsum core preferably having a total void volume from about 80% to about 92%, and made from a slurry including stucco, pregelatinized starch, and a naphthalenesulfonate dispersant. The combination of the pregelatinized starch and the naphthalenesulfonate dispersant also provides a glue-like effect in binding the set gypsum crystals together. The wallboard formulation, along with small air bubble voids (and water voids) provides dust control during cutting, sawing, routing, snapping, nailing or screwing down, or drilling of the gypsum-containing products.

Abstract: Disclosed is an environment-friendly acoustic panel for building, including an acoustic panel which includes a first positioning groove and a second positioning groove, a positioning cylinder with open top and bottom ends being arranged in the first positioning groove in a length direction of the first positioning groove, the positioning cylinder being provided with an opening in an outer side wall of the first positioning groove, and a fixing block being arranged in the second positioning groove; two sets of sealing assemblies, the sealing assembly including an accommodating groove, a bottom portion of the accommodating groove being provided with a plurality of springs at intervals up and down, end portions of the plurality of springs are jointly connected with a positioning plate, and a surface of the positioning plate facing away from the springs being fixedly provided with a sealing block.

Abstract: A sound damping device adapted to be arranged inside a duct, comprises a first element (40a) including at least one first wall (20a) of a first channel (12a) having a first channel inlet (13a) and a first channel outlet (13b), a second element (40b) including at least one second wall (20a) of a second channel (16a) having a second channel inlet (14b) and a second channel outlet (14b), said and outlet regions being substantially opposite to one another, wherein at least a portion of at least one of said first and second elements (40a, 40b) comprises an acoustic energy dissipative sheet material.

Abstract: An acoustic insulator is provided. The acoustic insulator includes a corrugated layer and a facer layer. At least one of the corrugated layer or the facer layer is an acoustic paper having a basis weight of 32 g/m2 to 540 g/m2 and an airflow resistance of 500 mks rayls to 2,500 mks rayls. The acoustic insulator is effective for attenuating low frequency noise and exhibits excellent fire resistance.

Abstract: Acoustic panels, grids for acoustic panels, suspended ceiling systems and a method for producing an acoustic panel, especially a man-made vitreous fibre (MMVF) panel, having a first major face and an opposite second major face, with the first major face comprising a facing with a surface coating. To provide high light reflection the coating comprises microspheres.

Abstract: An object of the present invention is to provide a sound insulating sheet member that has high sound-insulating performance which exceeds mass law while being relatively light weight, that is highly flexible in design, excellent in versatility, and easy to manufacture so that productivity and economic efficiency can be improved, and a sound insulating structural body or the like using the same. The object thereof is achieved by using a sound insulating sheet member comprising at least a sheet having rubber elasticity and a plurality of resonant portions, wherein the resonant portions are provided in contact with a sheet surface of the sheet, each of the resonant portions including a base part and a weight part, and the weight part being supported by the base part and having a larger mass than the base part.