Abstract: The present invention relates to panels that can be used to cover interior surfaces in buildings, for instance in auditoriums, open-plan offices etc., where the panels can be used in buildings with thermally activated building systems (TABS) in which balancing of acoustics and thermal comfort is a well-recognized challenge. According to a first embodiment of the invention there is provided a panel comprising one or more sound-absorbing elements (3) and sub-regions (7, 8, 9) that connect the front (11) of the panel with the rear (12) of the panel, and in which sub-regions (7, 8, 9) sound-absorbing elements (3) are not present, whereby said sub-regions (7, 8, 9) ensure thermal transmission through the panel.

Abstract: An acoustical vinyl tile having an integral acoustical layer is disclosed. The vinyl tile includes a vinyl portion, an acoustical portion, and an adhesive layer for fixing the vinyl portion to the acoustical portion. The acoustical portion comprises a crumb rubber component and a polyurethane foam component. The acoustical portion can include 10-40% crumb rubber and 60-90% polyurethane foam. The resulting vinyl tile meets ASTM E 2179 IIC sound requirements. A method of making a vinyl tile meeting the ASTM sound requirements is also disclosed. The method includes providing a vinyl slab portion, providing an acoustical slab portion comprising crumb rubber, polyurethane foam and a resin binder; and bonding the vinyl slab portion to the acoustical portion. Other embodiments are described and claimed.

Abstract: Sound absorbency is imparted on a panel, which has increased strength and rigidity, by laminating a foam resin that is not originally permeable and does not absorb sound, and surface sheets that are not originally permeable and do not absorb sound. A sound absorption panel 1, obtained by laminating a foam resin 20 comprising closed cells and aluminum alloy sheets 10 (metal sheets), has a plurality of holes 30 formed therein, which penetrate the foam resin 20 and the aluminum alloy sheets 10 in the thickness direction. The holes 30 are formed by forcing a needle 40 (hole-forming means) through the foam resin 20 and the aluminum alloy sheets 10.

Abstract: Attenuating element consisting of a head part, neck part and base part. The neck part is narrower compared to the head part and neck parts of adjacent attenuating elements form a continuous channel. Via the head parts, this channel is connected so that the cross-sectional area of the head parts is smaller than the cross-sectional area of the base parts. In this way, a water-control structure, sound-attenuating wall and the like can be provided. Such attenuating elements can be produced in a very simple manner by dividing them vertically and producing each of the vertical parts from concrete in a mould.

Abstract: A system for sound isolation. The system is configured to acoustically isolate a gypsum board support channel from a frame member. The system may comprise: a sound isolation clip and fastener, wherein the sound isolation clip comprises a slit configured for mounting onto a flange of a support channel and a fastener hole for securing the fastener and sound isolation clip onto the flange of the support channel. The fastener may be a screw and may comprise a wafer head and shank with a threaded portion and a smooth portion. The threaded portion is used to fasten and secure the mounting screw, sound isolation clip, and support channel onto a wallboard panel and support frame. The smooth portion is used to allow the sound isolation clip to freely move when engaged with the support channel and uniformly distribute the static dead load into the sound isolation clip.

Abstract: A device with simultaneous negative effective mass density and bulk modulus has at least one tubular section and front and back membranes sealing the tubular section. The front and back membranes sealing the tubular sections seal the tubular section sufficiently to establish a sealed or restricted enclosed fluid space defined by the tubular section and the membranes, and restrict escape or intake of fluid resulting from acoustic vibrations. A pair of platelets are mounted to the membranes, with the individual platelets substantially centered on respective ones of the front and back membranes.

Abstract: An insulation device for an aircraft, comprising a blanket comprising a layer of insulation filling enclosed in a cover and having provision areas for the passage of aircraft components, these areas being devoid of insulation filling and being formed by a surface junction of two opposite faces of the cover inducing a recess in at least one face. The insulation device comprises an associated detachable complementary assembly to cover at least one of the provision areas, the assembly comprising a portion of insulation filling shaped to fit into the corresponding recess, and a retention arrangement for retaining this portion of filling. The retention arrangement is provided with a detachable arrangement for fixing the detachable complementary assembly on at least one face of the cover.

Abstract: A sound absorbing body includes fibers as a main constituent. A density of the sound absorbing body differs for one surface side and the other surface side in a thickness direction. A color of the sound absorbing body differs for the one surface side and the other surface side.

Abstract: Systems and methods provide a multi-layer insulation (MLI) that includes a plurality of sealed metalized volumes in a stacked arrangement, wherein the plurality of sealed metalized volumes encapsulate a gas therein, with the gas having one of a thermal insulating property, an acoustic insulating property, or a combination insulating property thereof. The MLI also includes at least one spacer between adjacent sealed metalized volumes of the plurality of sealed metalized volumes and a protective cover surrounding the plurality of sealed metalized volumes.

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: An acoustic panel for sound attenuation employs a septumized cellular core sandwiched between a backsheet and a linear acoustic facesheet. The linear acoustic facesheet employs a linear material layer that impedes acoustic waves entering the core substantially linearly over a wide range of frequencies and sound of pressure levels.

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: A printing device includes a case, a printing unit arranged inside the case, and a sound absorbing body arranged inside the case. The sound absorbing body has parts with different densities including a dense part with a higher density and a non-dense part with a lower density. The non-dense part includes a fibrillated part that is fibrillated into fiber form, and an unfibrillated part that is not fibrillated into fiber form.

Abstract: A sound absorbing body includes a fibrillated part fibrillated into fiber form, and an unfibrillated part that is not fibrillated into fiber form. The unfibrillated part is dispersed inside the single sound absorbing body.

Abstract: To absorb a noise produced by an external force that generates an audio frequency even if it is applied thereto, and to make it hard to become a noise source to a surrounding area. It includes a surface layer 20 having microscopic pores 21 formed on a surface 20A, communicating passages 24 communicating with the microscopic pores 21 and a porous layer 10 having sound pores 14 that are formed at an inner part deeper than the surface layer 20 having the microscopic pores 21 formed, communicate with the communicating passage 24 and that have a volume larger than volumes of the microscopic pore 21 formed on the surface 20A and the communicating passage 24. A sound absorption characteristic and/or a sound insulation characteristic is provided by the microscopic pores 21 of the surface 20A, the communicating passages 24 of the porous layer 10, and the sound pores 14 of the porous layer 10.

Abstract: The invention relates to a device for reducing the noise emitted by a conduit belonging to an aircraft system that comprises an acoustic grid positioned in a segment of the conduit. Said grid has a length L1, along the axis (X-X) of said segment, and includes multiple meshes, each of which fits into a square with side m, the following relationships being satisfied: L1>1.8?fmin, m<?fmax/2, where fmax is the maximum frequency of the noise to be attenuated, fmin is the minimum frequency of the nice to be attenuated, ?fmax is the wavelength of the noise at frequency fmax, and ?fmin is the wavelength of the noise at frequency fmin. Application to air intake and outlet conduits of aircraft systems.

Abstract: An assembly is configured to provide insulation and sound-dampening within an air-handling system. The assembly includes a single housing defining an internal chamber, at least one sound-absorption member within the internal chamber, wherein the at least one sound-absorption member is configured to dampen sounds generated by or within the air handling system, and an insulative material within the internal chamber, wherein the insulative material is configured to insulate the air handling system.

Abstract: A membrane is disclosed. The membrane contains a first weight disposed at a center portion of the membrane, and a first hinge structure disposed away from the center portion of the membrane.

Abstract: An apparatus and method is disclosed for an improved acoustic panel comprising a sound absorbing member defined by a first and second face surface and a plurality of peripheral edges. A sound blocking member is defined by a first and second face surface and a plurality of peripheral edge. The first face surface of the sound blocking member is secured relative to the second face surface of the sound absorbing member for blocking the transmission of sound therethrough. In another embodiment, the first face surface of the sound blocking member is spaced relative to the second face surface of the sound absorbing member for decoupling the sound blocking member from the sound absorbing member.

Abstract: Thermally insulating septums are located internally within the cells of an acoustic honeycomb to regulate heat flow into the acoustic structure. The internally located insulating septums protect the honeycomb and acoustic septums located within the honeycomb cells from heat damage that might otherwise be caused by a heat source, such as the hot section of a jet engine. The internal thermal regulators are useful in combination with heat blankets or other thermal insulating structures to provide a reduction in size and/or weight of the insulating structure while still providing the same overall degree of thermal insulation for the acoustic honeycomb.

Abstract: A wet laid basemat for an acoustical ceiling tile comprising on a dry weight basis, 50% or more mineral wool fiber, including shot, less than 9% binder, and between 5 and 20% chopped strand glass fiber, and, optionally, minor amounts of other constituents, whereby the chopped strand glass fibers serve to promote and/or maintain voids in the mat such that the dry basemat has a density of between about 7½ to about 10½ lbs. per cubic foot and an NRC substantially greater than 0.55.

Abstract: An audio recording apparatus that improves atmospheric acoustic conditions by method of processing sound forms presented directly or non directly to either the front or rear of the device. Presented sound forms pass through an internal structure comprised of a series of inlaid acoustic panels, sound dampeners, audio baffles, sound chambers, and noise cancellation filters to result in a more purified balanced sound that is ideal to be recorded into a microphone. This audio purification system is a 180 degree or 360 degree audio filtering system with attached frontal sound filter and top mounted acoustic panel. The device is capable of supporting 360 degree sound filtration with a frontal acoustic filter attachment and overhead acoustic control with a top mounted acoustic ceiling panel.

Abstract: An acoustic element has at least two board-shaped elements (1, 2). A dampening element (3), preferably a nonwoven element, is arranged between the two board-shaped elements (1, 2). The board-shaped elements (1, 2) exhibit bore holes (1c, 1d, 2c, 2d). The bore holes each exhibit a diameter of not more than 3 mm.

Abstract: A portable electronic device having an outer case having a substantially planar face in which a microphone associated acoustic port is formed. The device also has a micro-electro-mechanical system (MEMS) microphone positioned within the outer case, the MEMS microphone having a diaphragm facing the microphone associated acoustic port. An acoustic mesh is positioned between the front face of the outer case and the diaphragm, the acoustic mesh having a non-linear acoustic resistance so as to minimize an effect of an incoming air burst on the diaphragm. Other embodiments are also described and claimed.

Abstract: An acoustic structure (e.g. an acoustic tuning panel) includes a plurality of boards and a plurality of resonance tubes with a plurality of openings. The openings are formed at different positions on the side faces of the resonance tubes. One resonance tube may be interposed in and supported by a pair of boards, or one board may be interposed in and supported by a pair of resonance tubes. The resonance tubes are mutually movable in the axial direction so as to independently adjust the opening area of the opening of the resonance tube. With this behavior, it is possible to adjust a ratio of the opening area of the resonance tube to the sectional area of the internal cavity of the resonance tube, thus adjusting the bandwidth of a band causing a sound-absorbing effect and a sound-scattering effect in an acoustic space (e.g. a sound chamber).

Abstract: In order to mitigate transmission to the passenger compartment of noise generated in the engine compartment, a dash silencer is installed on the passenger-compartment-side surface of the dash panel of an automobile, wherein the mounting operation is facilitated by improving the mounting structure for the dash silencer. A stud pin is provided to the passenger-compartment-side surface of the dash panel, a chevron-shaped slit is formed in the mat-shaped dash silencer, and the stud pin is inserted through the slit, whereby the dash silencer is mounted on the passenger-compartment-side surface of the dash panel, wherein, when the chevron-shaped slit is formed in the dash silencer, a lower portion separated by the slit is caused to project farther than the upper portion toward the passenger compartment, and the lower portion is caused to inflect into the passenger compartment so as to form a stepped shape.

Abstract: A dash silencer is constructed by layering a front side layer formed from a porous material, an intermediate layer constructed by a film structure body and a rear side layer. The rear side layer has upper and lower side layer portions which are formed from porous and sound insulation materials respectively and layered on upper and lower side layer portions of the intermediate layer.

Abstract: Embodiments relate generally to plastic wall panels. Wall panels are formed by rotational molding processes and may be used in sound attenuation barriers or other wall or building structures. Some embodiments include reinforcing structure. The reinforcing structure may be configured to effectively support a plastic shell of the wall panel in a way that allows some relative movement between the plastic shell and the reinforcing structure.

Abstract: A sound absorbing structure includes multiple sound absorbers. The sound absorbers are assembled together into a sound absorbing member. The sound absorbing member absorbs sound emitted from a sound source. Each of the sound absorbers is shaped like a hollow tube. Each of the sound absorbers has a hole extending in its axis direction.

Abstract: An acoustic absorber includes a wall provided with a plurality of apertures as well as a substantially non-perforated second wall, with the first wall and the second wall being spacedly arranged to one another, and at least one honeycomb structure being provided between the walls, with the honeycomb structure having a substantially cylindrical recess in at least one area, with a funnel element opening to the first and second walls being provided in the recess, and having a height greater than the distance of the walls, with the second wall being designed pot-like in the area of the funnel element.

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: Disclosed is a method for modifying the frequency response of a wood panel within an acoustical structure such as a studio or concert hall. The modification is imparted by exciting the wood paneling with acoustic energy. Frequency response is the measure of a system's spectrum response at the output to a signal of varying frequency (but constant amplitude) at its input. The acoustic energy includes at least one excitation frequency, which is preferably in the audible spectrum (20 to 20,000 Hz). The use of acoustic energy from the remote source provides non-contact excitation of the wood paneling. In one embodiment, the acoustic energy is at least one sound wave which comprises at least one resonant frequency of the wood paneling, at least one acoustic mode of the wood paneling, at least one discrete broadband frequency, a composite frequency (including multiple broadband frequencies, white noise and pink noise) or any combination thereof.

Abstract: A sound attenuation mechanism made up of multiple substrate layers, including corrugated layers. The use of corrugation provides an inexpensive and manner of forming a plurality of highly effective acoustic attenuation channels throughout the mechanism. The multi-layered mechanism may be provided in a variety of modular forms and sizes which may be combined to form a low-cost, highly effective attenuation housing. For example, such a housing may be utilized to contain otherwise noisy large scale oilfield equipment such as coiled tubing engines. Additionally, where drainage from the housing is sought, a spiraled attenuation channel may be employed such that the effectiveness of the attenuation provided by the housing is not sacrificed.

Abstract: A method and apparatus for reducing sound. A layer of material has holes extending from a first side of the layer of material to a second side of the layer of material. The holes are configured to provide a desired level of acoustic resistance to sound traveling through the layer of material. The layer of material is configured to be mounted to a platform.

Abstract: In the field of aviation, a device for limiting aerodynamic noise from a deployed aircraft undercarriage during landing and/or takeoff. The device comprises two end plates (4a, 4b) for closing respective ends (2a, 2b) of a hollow pin (1) of the undercarriage, such as a hinge pin between two rods of the undercarriage, together with at least one tie (6) for engaging inside the hollow pin (1) to connect the two end plates (4a, 4b) together so as to hold them pressed against the ends (2a, 2b) of the pin (1).

Abstract: An acoustical vinyl tile having an integral acoustical layer is disclosed. The vinyl tile includes a vinyl portion, an acoustical portion, and an adhesive layer for fixing the vinyl portion to the acoustical portion. The acoustical portion comprises a crumb rubber component and a polyurethane foam component. The acoustical portion can include 10-40% crumb rubber and 60-90% polyurethane foam. The resulting vinyl tile meets ASTM E 2179 IIC sound requirements. A method of making a vinyl tile meeting the ASTM sound requirements is also disclosed. The method includes providing a vinyl slab portion, providing an acoustical slab portion comprising crumb rubber, polyurethane foam and a resin binder; and bonding the vinyl slab portion to the acoustical portion. Other embodiments are described and claimed.

Abstract: A sound insulation floor structure comprises a floor backing member, a floor finishing layer, and an intermediate layer between the floor backing member and the floor finishing layer, the intermediate layer comprising a buffer member comprising a nonwoven structure. The nonwoven structure comprises a thermal adhesive fiber under moisture which is melt-bonded to a fiber of the nonwoven structure to fix the fibers. For example, the sound insulation floor structure may comprise, in sequence, a floor backing member 1, a buffer layer 2, an air layer 3, a hard layer 4, and a floor finishing layer 5. In the floor structure, a support member 6 is disposed between the buffer layer 2 and the hard layer 4. The support member may occupy 10 to 70% of a floor area. The sound insulation floor structure prevents subsidence of a floor member due to walking, achieves comfortableness to walk, and has improved floor impact sound insulation.

Abstract: A laminated acoustic building panel comprises a pair of plasterboard substrates which are bonded together by an adhesive layer, 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 to the applied surface area of the substrates 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 than known panels. The use of soft substrates and less adhesive significantly reduces the weight of the panel. Furthermore, the use of less adhesive significantly reduces costs and makes production easier.

Abstract: The present invention provides an interlayer film for laminated glass, that exhibits an excellent sound-insulating performance for solid-borne sound in an environment at or below 0° C. Another object is to provide laminated glass that is obtained using this interlayer film for laminated glass. The present invention is an interlayer film for laminated glass, that has a sound-insulating layer for which a temperature T1, which is the temperature that gives the maximum value of tan ? at a frequency of 1 Hz, is in the range from ?30° C. to 0° C.

Abstract: A panel assembly for a traffic noise barrier wall of the type including opposing slots formed in pairs of vertically-mounted posts is disclosed. In some embodiments, the panel assembly includes the following: a sheet of material having top, bottom, and side edges forming a perimeter of the sheet, the sheet having a sheet thickness that is less than each of the first slot width and the second slot width; and a frame disposed along at least a portion of the perimeter of the sheet, wherein the frame includes a bracket having a base portion with a substantially triangular cross-section, the base portion being disposed along edges of the sheet, the base portion defining a channel for capturing edges of the sheet, the channel being positioned at an apex of the base portion.

Abstract: There is provided an acoustic element (102) for placement in a sound path (120) of a loudspeaker device (100), the acoustic element (102) comprising a container(104) and an acoustic volume increasing material(106) located in the container (104). In an embodiment, the container (104) comprises wall portions with different physical characteristics. In other embodiments, the walls of the container (104) are made of the same material.

Abstract: A hearing protection process comprises (a) providing at least one hearing protection device comprising at least one sound barrier comprising at least one substantially periodic array of structures disposed in a first medium having a first density, the structures being made of a second medium having a second density different from the first density, wherein one of the first and second media is a viscoelastic medium having a speed of propagation of longitudinal sound wave and a speed of propagation of transverse sound wave, the speed of propagation of longitudinal sound wave being at least about 30 times the speed of propagation of transverse sound wave, and wherein the other of the first and second media is a viscoelastic or elastic medium; and (b) interposing the hearing protection device between an acoustic source and an acoustic receiver in the form of a human ear.

Abstract: The present invention includes a layered acoustical system for sound attenuation in a vehicle including an external decorative layer; a moldable fiber backer adhesively adhered to a back side of the decorative layer, the moldable fiber backer further including an engineered fiber blend including one or more types of thermoplastic fibers and having a first density; a moldable lofted sound absorber and vibration decoupling layer including being made from another engineered fiber blend including one or more types of thermoplastic fibers and having a second density that is less than the first density of the moldable backer, a top side of the vibration decoupling layer being adhesively adhered to the second side of the moldable fiber backer; and an intermediate layer embedded in a location within the vibration decoupling layer to achieve a balance point between transmission loss and sound absorption.

Abstract: An acoustic panel is provided that includes at least one cellular core arranged between at least an internal skin and an external skin, wherein the external skin incorporates at least one fastener able to collaborate in a disconnectable fashion with a complementary fastener associated with a structure to which it is to be attached.

Abstract: An adjustable sound panel having a sound diffusing element and a sound absorbing element.

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: The invention relates to a method for welding a first composite sheet metal part comprising at least two metal sheets and a sheet arranged between both metal sheets that consists of a material with a different chemical composition than the two metal sheets, to a second sheet metal part consisting of a solid metallic material or a further composite material with at least two metal sheets and a sheet arranged between the metal sheets that consists of a material with a different chemical composition than the two metal sheets. The object of providing a method for welding composite sheet metal parts is achieved by welding the sheet metal parts using a high-frequency welding method.

Abstract: A soundproofing plate includes a substrate wherein through holes are formed; and sound collecting parts, including through holes in the center, which approximately match the through holes of the substrate, the collecting parts having a shape wherein the diameter increases as the distance from the substrate increases. The sound collecting parts are disposed on both faces of the substrate. Alternatively, a soundproofing plate includes a substrate with a plurality of through holes; and attenuation elements. The attenuation elements include hollow shaft members; and sound collecting parts anchored on the end parts of the hollow shaft members. The sound collecting parts include through holes in the centers which approximately match hollow parts in the hollow shaft members; and have a shape wherein the diameter increases as the distance from the hollow shaft member increases. The hollow shaft members are disposed in the substrate to approximately match the substrate through holes.

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: Improved acoustic attenuation materials and applications are provided. An improved acoustic attenuation material may include a woven layer of fibers made of porous polymers, such as porous polytetrafluoroethylene (PTFE), that include interstitial space. An improved acoustic attenuation material may include sheets of porous polymers interleaved with layers of epoxy. The sheets of porous polymers may include through holes. An embodiment of an ultrasonic transducer that includes a backing with woven layers of porous PTFE fibers is provided. The ultrasonic transducer that includes a backing with woven layers of porous PTFE fibers may be used in a three-dimensional ultrasound imaging apparatus. An embodiment of an ultrasonic transducer that includes a plurality of sheets of porous PTFE interleaved with layers of epoxy is provided. The ultrasonic transducer that includes a plurality of sheets of porous PTFE may be used in an ultrasonic imaging catheter.