836 results about "Soundproofing" patented technology

The soundproof casing is divided to an engine room (1), a muffler room (2) and a radiator room (3). The engine room (1) includes the engine E and a work machine unit (generator unit G). The muffler room (2) includes mufflers M1, M2. The radiator room includes a radiator R. An electric fan D is provided between an air intake aperture (22a) and the radiator. The radiator room and the muffler room are communicated. An air flow duct (4) to communicate the engine room and the muffler room is provided. An engine fan F is provided just opposite to an entrance of the air flow duct. An inter-cooler I is provided in the air flow duct. The soundproof type engine driven work machine including aforementioned apparatuses is offered to improve the cooling efficiency as well as reducing unfavorable noise.

This invention relates to one digital product test method, which adopts digital product and loads with test program software standard audio files and comprises the following steps: the product displaying the standard audio files and sending the sound to the microphone through sound isolation environment; then generating audio files on horn sound; the product uses audio comparison program to compare the audio file and standard frequency files; according to the comparison audio frequency test parameters comparing the audio frequency test parameters and standard parameters to output results. This invention also discloses one special device.

An applicator head for connection to a robotic device, and useful for applying a fluid material to a substrate. The applicator head comprises: (a) a body portion; (b) at least one material delivery system comprising an inlet, a fluid delivery cavity, and two or more passageways connecting the inlet to the fluid delivery cavity; and (c) a nozzle plate attached to the bottom surface of the body portion, and having a plurality of openings communicating with the fluid delivery cavity. In one embodiment, the applicator head comprises a nozzle inserted in each of the plurality of openings in the nozzle plate, with each nozzle adapted to apply a bead of a fluid material to a substrate, with the beads spaced less than about 2 mm apart. Also disclosed is a sound-damping composition comprising: (a) n-butyl acrylate-acrylonitrile-styrene copolymer; (b) at least about 0.5% by weight of a low-density glass bead filler; (c) at least one additional filler; and (d) at least one rheological modifier; and having a density of from about 1 to about 2 g / cc. Methods for applying the sound-damping composition by extruding it onto a substrate and baking it to exhaust water in a controlled manner, and methods for increasing the sound-damping efficacy of an aqueous polymeric composition, are also disclosed.

Provided are an apparatus and method for opening and closing a window by slidably moving a movable window sash or door (hereinafter collectively called a ‘movable window sash’) with respect to a fixed window sash or door (hereinafter collectively called a ‘fixed window sash’). The apparatus is designed such that the movable window sash cannot only slide along a rail mounted within a blank frame but also be separated from a roller to move back and forth from any position on a rail toward the blank frame or the fixed window sash in a perpendicular direction with respect to a length direction of the rail, thus allowing the entire seal member interposed between either the blank frame or the fixed window sash and the movable window sash to be uniformly pressed in the perpendicular direction. Thus, excellent soundproofing, air tightness (windproofing), water tightness, insulation performance, and wind pressure resistance can be provided. Furthermore, the sliding window system has a simplified opening / closing structure and a minimum number of components, and low manufacturing cost.

Vibro-acoustic attenuation or reduced energy transmission. The present invention relates to devices that display frequency zones of strong vibro-acoustic attenuation or reduced energy transmission. This can be used in particular, although not necessarily solely, in applications that require lightweight materials with good mechanical properties and good vibro-acoustic response or in applications that require materials with high sound reflection, absorption or sound isolation in a certain frequency band.

A joint-sealing tape is useful for sealing building-structure joints, especially for sealing against sound and / or smoke and if necessary against fire. In particular, the joint-sealing tape is suitable for sealing a joint between a first building part and a second building part, with a sealing element and an adhesive layer, which sealing element has a predetermined geometry. Furthermore, a sealing arrangement contains such a sealing tape and is suitable for sealing of building structure joints, especially for sealing against sound and / or smoke and if applicable against fire.

The invention discloses heat-insulating sound-insulating dry-mixed mortar, made from the following components, by weight: 30-40% of cement, 30-35% of vitrified micro bubbles, 9-14% of elastic rubber powder, 0.5-2% of latex powder, 5-7% of clay, 4-5% of ash calcium, 0.5-2% of polypropylene fiber, 0.4-3% of cellulose ether, and 1-2% of a water reducer. A floor slab made with the heat-insulating sound-insulating dry-mixed mortar has an impact sound improvement of 15.0-25.0 dB and a heat conductivity coefficient of about 0.050 W / m.K. The dry-mixed mortar has good heat-insulating performance, low heat conductivity coefficient, high strength and good anti-cracking performance, can provide excellent heat-insulating and sound-insulating effects for buildings, has stable properties and small fluctuation with good sound-insulating effect, and has the advantages of good constructability, good adhesion, non-inflammability, zero hollowing and cracking and low economic cost.

Vibro-acoustic attenuation or reduced energy transmission. The present invention relates to devices that display frequency zones of strong vibro-acoustic attenuation or reduced energy transmission. This can be used in particular, although not necessarily solely, in applications that require lightweight materials with good mechanical properties and good vibro-acoustic response or in applications that require materials with high sound reflection, absorption or sound isolation in a certain frequency band.

The composite plastic sheet includes facing layer, middle layer and base layer, the facing layer is made of PVC, modified PP or modified PE; the middle layer is made of PVA film or polyurethane thermosol film; and the base layer is made of foamed PVC, modified PP or modified PE. Over the facing layer, there is one layer of coated dulling agent with pressed pattern. The composite plastic sheet has good comprehensive performance and its adhering middle layer combines the facing layer and the base layer well. The composite plastic sheet has the advantages of excellent heat insulating and sound isolating performance, high shock resistance, high anticorrosive performance, high electric insulating performance, high strength, beautiful appearance and easy cleaning.

The invention relates to a new construction and its methods for environmental protection, energy conservation, natural ventilation, air conditioning, noise insulation and heat preservation. It is applicable to all kinds of industrial and civil buildings. Its character is that it adopts the rationale of air-control to natural draft by cavities. In order to natrurally control the room-temperature and natural draft , it needs many cavities around the house to prepare for the natrural draft, soundproofing air-control circulate system work in the cavities formed by the intercommunication of the wall and ground ,using some special methods such as airy-control the ground and sound isolation control the wall by the wind cavities. Besides,it also recommends a manufactural erectional construction way which is suitable for the sustaining system between the earth-cavity and wall- cavity .The invention eliminates disadvantage of traditional out-of-date technique in resource-saving and environment protesting,with great worth of soundproofing, and improves noise insulation of buildings and natural ventilation permeability effect of environmental protection, energy saving and economy.

The invention discloses a pipe clamp, with a sound-proof soft cushion layer, capable of fixing a pipe in advance. The pipe is provided with two main bodies clamped face to face, a mechanism locking the two main bodies and a mechanism, wherein the pipe clamp is connected on a supporting body through the mechanism. After clamping the pipe and being locked, the two main bodies form a circle or an oval. Soft cushion layers are attached to the inner surfaces of cambered surfaces of the two main bodies, wherein a soft cushion layer is attached to the inner surface of a cambered surface, with the arc length not larger than that of a semi circle arc, of a main body with the arc length larger than that of the semi circle arc; and hard clamping protrusions are installed on the surfaces of the left and right inner sides of a circular arc with the arc length not smaller than that of the semi circle arc or of a plane, and are clamped on the left and right top ends of the soft cushion layer through a U-shaped mode. The pipe clamp, with the sound-proof soft cushion layer, capable of fixing the pipe in advance is simple and reasonable in structure. In the process of actually installing and testing the pipe, through the sound-proof soft cushion layer is attached to the inner surface of a main body (a fixed body) with the arc length larger than that of the circular arc of the semi-circle, the body can independently, temporarily and stably fix the pipe in advance, the pipe can not drop from the main body (the fixed body), and the sound-proof soft cushion layer can not easily drop from the pipe clamp. An installment worker can more conveniently and more effectively work.

A sub-flooring panel with improved impact and / or sound deadening (ISD) properties that is adapted to adjoin other sub-flooring panels to form a sub-flooring panel assembly, includes a base body having an upper surface formed with a groove for receiving a heating / cooling element, such as hydronic piping. A sub-flooring system with significantly improved ISD properties includes the panel assembly and an underlayment assembly which comprises a plurality of stabilizing supports, each support being adjustable in height, to support at least a generally rigid board and a fiberboard on which finishing flooring or laminate may be installed.

The invention relates to a method for producing an automotive sound-insulating pad. The method for producing the automotive sound-insulating pad comprises the following steps of: a, laying a raw material, namely laying a thermoplastic felt material on the network chain of an oven; b, baking and softening, namely feeding the thermoplastic felt material into the oven through the network chain of the oven for baking and softening, wherein the temperature of an upper heating zone in the oven is between 230 and 250 DEG C, the temperature of a lower heating zone is between 310 and 330 DEG C, and the baking time is 255 to 285 s; c, performing compression molding, namely performing compression and cooling on the baked and softened thermoplastic felt material to be a semi-finished product, wherein during the compression and cooling molding, the molding pressure is 16 to 17 MPa, the molding time is 90 to 110 s, and the cooling temperature is between 20 and 30 DEG C; d, performing water jet cutting, namely positioning the semi-finished product subjected to the compression cooling, and performing water jet cutting to obtain the required sound-insulating pad, wherein the cutting water pressure is 40,000 to 50,000 psi, and the cutting air pressure is 0.6 to 0.8 MPa; and e, inspecting, namely inspecting the sound-insulating pad, and packing and warehousing. The method for producing the automotive sound-insulating pad is simplified, energy-saving and environment-friendly, the automotive sound-insulating pad has high strength, the production efficiency of the method is high, and the method can reduce labor intensity.

The invention relates to a low-noise elevator car internal ventilation and air deflecting system and solves the problems that a conventional elevator car internal ventilation device has the disadvantages of high blower noise and invariable air volume. The system comprises a blower, an air duct and a control unit for controlling the operation of the blower; one end of the air duct is connected to the air outlet of the blower, and the other end of the air duct is connected with the elevator car; the blower is installed in a soundproof box, a ventilation opening is formed on the soundproof box, and the air outlet of the blower is connected with the air duct through the ventilation opening; a silencer is arranged on the air duct; and an air deflecting device is arranged at a port of the air duct, where the air duct is connected with the elevator car. The system has the advantages that the noise is effectively reduced on the basis of maintaining big air volume; the ventilation in the elevator car is more uniform, and the comfort of passengers taking an elevator is improved; and the air volume of the blower can be adjusted according to temperature and passenger capacity, so as to further meet the requirements of the passengers and to be more energy-saving and environment-friendly.

Herein provided is a sound-insulating laminated structure which is excellent in the ability of insulating low frequency sounds whose frequency falls within the range of from 200 to 1000 Hz.The sound-insulating laminated structure comprises a first glass wool layer, a metal foil layer free of any opening and a second glass wool layer. The first and second glass wool layers are ones each prepared by collecting and combining short glass fibers through the application of an uncured thermosetting phenol resin to the short glass fibers to thus give a web of glass wool prepreg and then molding, with heating, the web into a sound-insulating laminated structure having a desired shape.

The invention relates to a method for producing a sound insulating pad under an automotive carpet and belongs to the technical field of automotive interior parts. The sound insulating pad under the carpet is manufactured by using an elastic layer formed by PET (polyethylene terephthalate) fibers, low melting point fibers, cotton and PU (Poly Urethane) and a middle channel heavy coating formed by EPDM (Ethylene-Propylene-Diene Monomer). The product prepared by the method can reach equal density and unequal thicknesses and is greatly improved on the aspects of reducing the gram weight and insulating sound; the product adopts the forming flow production; excess materials of the product can be recycled, so that the manufacturing cost and the material cost are saved; in the whole production process of the product, no harmful substance is generated; the sound insulating pad under the automotive carpet belongs to an environment-friendly product.

The invention provides a vibration and noise reduction device of a compressor. The vibration and noise reduction device of the compressor comprises a surrounding wall, a mounting cavity used for mounting the compressor is formed in the surrounding wall, the surrounding wall comprises a sealed shell, a sound absorption layer and a sound insulation layer, the sound absorption layer is arranged on the inner side of the sealed shell, the sound insulation layer is arranged between the sealed shell and the sound absorption layer, and sound wave energy decrement holes are formed in the sound insulation layer. The noise reduction function of the vibration and noise reduction device of the compressor can be improved.

A one-piece soundproofing panel which is attached within an circumferential air blower casing of a turbomachine, with an axis, in which circulates an airflow from upstream to downstream, is disclosed. The panel includes a circumferential rigid seat with a longitudinal cylindrical part, arranged to axially extend with respect to the axis A of the turbomachine, having an outside surface, intended to come to extend facing with an internal surface of the air blower casing, and an internal surface to which is applied a soundproofing coating; and an annular fastening flange, formed at the upstream end of the longitudinal cylindrical part, radially outwardly extending, the fastening flange being arranged to cooperate with a fastening flange of the air blower casing.

The invention relates to a method for producing a sound-heat insulated cushion of an automobile. The method comprises the following process steps of: heating a basal plate in a preheating area oven; putting the heated plate in a sucking plastic mold for sucking plastic forming; adhering felt or PU to the plate after the sucking plastic forming to obtain a semi-finished product; cutting the semi-finished product into a product with required specification by a water jet; removing rough edges, mounting accessories and sticking a qualified label; and inspecting, and after inspection, packing and warehousing the product. The method has the advantages that the method reduces production cost, simplifies flow, reduces operational requirement and has strong practicability; and the method fills a process blank in the field of sound-heat insulated products, the product produced by the method is flexible and not broken off, the packing cost is lowered, the flowline production is formed, the process is stable, all parameters can meet the requirements of an engine maker, no harmful matter is generated during the whole production process, and the method belongs to the environmental protection process.

A soundproof structure has one or more soundproof cells. Each of the one or more soundproof cells includes a frame having a through-hole, a film fixed to the frame, and an opening portion configured to include one or more holes drilled in the film. Neither end portions of the through-hole of the frame are closed. The soundproof structure has a shielding peak frequency, which is determined by the opening portion of each of the one or more soundproof cells and at which a transmission loss is maximized, on a lower frequency side than a first natural vibration frequency of the film of each of the one or more soundproof cells, and selectively insulates sound in a predetermined frequency band including the shielding peak frequency at its center. Accordingly, there is provided a soundproof structure that is light and thin, does not depend on the position and shape of a hole, has high robustness as a sound insulation material, is stable, has air permeability, has no heat, and is excellent in manufacturability, and a soundproof structure manufacturing method.

A pillow comprises a resilient median portion, two resilient lateral portions and sound deafening earmuffs. The median portion is adapted to receive a back of a person's head. The two lateral portions are attached to an opposite side of the median portion. The earmuffs comprise two sound deafening ear coverings and a flexible band connecting the two sound deafening ear coverings. Each one of the two lateral portion have a cavity to accommodate the sound deafening ear coverings. In use, the flexible band is operative to bias the two sound deafening ear coverings over two ears of the person.

Polyurethane foams formed under vacuum (below atmospheric pressure) conditions using primarily graft polyether polyols reacted with primarily toluene diisocyanate have lower densities (up to 1.3 lb / ft3), lower hardness (IFD25=up to 50 lbs), and exhibit superb thermoformability and fire retardance while retaining good sound insulating characteristics. The foam-forming ingredients are mixed together and foamed under controlled pressures in the range 0.5 to 0.95 bar (absolute). Such foams taken alone, or in combination with a barrier layer to form a laminate, are thermoformed to create a sound insulator for a motor vehicle instrument panel.

Headphones with acoustically resistant ear cups, an external noise sensor mounted thereto that monitors ambient noise, and internal sensors to monitor noise within each ear cup are disclosed. A processing system monitors the external and interior sound detected by the sensors and compares the level inside the ear cups with the detected level of ambient noise. It activates a transducer such as a vibrator, buzzer, or light as needed to indicate when the level within the ear cups has exceeded the predetermined criteria thereby indicating improper fit of the headphones. Alternative embodiments include wirelessly communicating the collected data to an auxiliary computer for remote data collection, storage and monitoring. The headphones may also provide a sound dosimeter; bandpass filtering; automatic noise reduction with feed forward and / or feed back; wireless voice and data communication; and a voice activated switch, all using elements of the headphone fit detection circuitry.

The invention discloses a vehicular sound-absorption and thermal-insulation material and a preparation method of the vehicular sound-absorption and thermal-insulation material; the vehicular sound-absorption and thermal-insulation material comprises the components including PP, PET and glass fibres; the vehicular sound-absorption and thermal-insulation material is divided into five layers sequentially including a bottom glass fibre layer, a second mixed fibre layer comprising glass fibres, PP fibres and PET fibres, a medium mixed fibre layer comprising a PP material and PET, a fourth mixed fibre layer comprising the glass fibres, the PP fibres and the PET fibres, and a surface glass fibre layer; and the five layers are molten and connected into a whole. By means of the manner, the vehicular sound-absorption and thermal-insulation material disclosed by the invention not only can satisfy the flame-retardant property but also is capable of improving the sound-absorption property; in addition, on the basis of that of a traditional sound-absorption and thermal-insulation material, the sound-absorption property is increased by 30-50%.

The invention relates to an anechoic chamber which is capable of carrying out acoustic testing, which comprises an anechoic chamber, and is characterized in that acoustic material is laid on the ground and / or the inner wall of the anechoic chamber; and a damping spring is further arranged on the ground of the anechoic chamber. The invention further provides a method for manufacturing the anechoic chamber capable of carrying out acoustic testing, which comprises the following steps: firstly, designing and mounting an anechoic chamber as required; then designing acoustic material and a sound-insulating structure according to the sound absorbing and acoustic insulating requirements of the anechoic chamber; and finally selecting and arranging a damping spring according to the total weight of the anechoic chamber. As the acoustic material and the sound insulating material are added to the prior anechoic chamber, the anechoic chamber has the advantage that not only the testing and research of electromagnetic compatibility, but also the testing and research of acoustic testing can be carried out, thereby avoiding repeated construction and greatly saving the cost of engineering construction.

The invention discloses PVC (polyvinyl chloride) double-side compound sound-proof felt and a preparation method of the felt. The PVC double-side compound sound-proof felt is in an A-B-A layered structure; the A-B-A layered structure comprises a PVC heavy layer, and fiber punched felt compounded on the upper surface and the lower surface of the PVC heavy layer. The novel PVC sound-proof felt adoptsa compound structure; a sound-proof component for an air conditioner compressor can be conveniently arranged and quickly mounted; the sound-proof felt can achieve the best sound-proof, noise reduction, damping and shock absorption effects; in addition, the sound-proof felt further has effects of effectively protecting harnesses and copper pipes against oscillation wear and removing abnormal sloshing sound; and the sound-proof felt is environment-friendly and stable in performance. The preparation method is simple, and adopts hot-melt rolling compounding, and the product is free from lamination and has good practicability.

A soundproofing assembly includes stacked layers in the form of a first set of layers (36) having good resistance to the passage of air, and a second set of layers (24) with mass-spring function including a layer (28) having a heavy viscoelastic mass and a spring type layer (26); the first set of layers includes a layer (36) of a foam with open cells of high porosity, high tortuosity and good resistance to the passage of air, the layer (36) having, owing to its high tortuosity, excellent sonic absorption properties at medium and high frequencies. The invention is useful for soundproofing motor car passenger compartments.

The object of the present invention is to provide a soundproofing material that is lightweight and has sufficient soundproofing performance. The present soundproofing material includes a frame body 4 including a planar portion and a wall body installed upright on the planar portion and a soundproofing laminate accommodated in a laminate accommodating portion surrounded by the wall body, and the soundproofing laminate has a hard layer consisting of a rubber sheet or the like and a soft layer whose one side of the soft layer is laminated on the hard layer and consists of a felt, a resin foam or the like, and another side of the soft layer is joined to at least one of the planar portion and / or the wall body of the frame body, and a side surface of the soundproofing laminate and a side surface of the wall body are distant from each other. The distance thereof is preferably in the range from 0.3 to 1 mm.