806 results about "Soundproofing" patented technology

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.

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.

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.

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.

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.

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.

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 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.

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.

The invention relates to a flame retarding and sound insulating pad with high density and low smoke toxicity and a preparation method thereof. The flame retarding and sound insulating pad with the high density and the low smoke toxicity belongs to a rubber product. The flame retarding and sound insulating pad with the high density and the low smoke toxicity is prepared by steps of: mixing 20-300 parts of chlorinated polyethylene, 10-200 parts of butadiene styrene rubber, 10-800 parts of barium sulfate, iron compound and mica, 10-400 parts of inorganic flame retardant, 1-50 parts of auxiliary and 1-10 parts of antiager RD according to a formula ratio by an internal mixer, and molding the components by a calender to form the pads with corresponding specifications. The pad disclosed by the invention maintains good flexibility and tailing property, has excellent physical properties such as high sound insulating quantity, high flame retarding level, low smoke level, low smoke toxicity, no drippage of combustion and the like, and can be widely applied to sound insulating and noise reducing treatment of motor train units, buildings and pipelines. The pad is a novel, safe, green and efficient sound insulating product.

The invention is directed to an anti-vibration sound insulator for a suspended ceiling which is intended to be used either in residential or commercial applications. The insulator comprises a metal furring devised to be fixed to the ceiling. It also includes a central part comprising a star-shaped element having an upper vertical plate provided with an orifice and two lower plates each having extremities. These extremities are folded so as to jointly form a slide rail sized to receive and support the folded extremities of the metal furring. The central part also comprises an insulating element devised to be inserted in the upper plate orifice, this insulating element including an orifice. This latter orifice allows introducing a fixing element so as to fix the insulator beneath a floor, or against a joist supporting the floor.

The invention discloses a sound-insulating floating floor surface structure comprising a bearing floor (4) of a reinforced concrete structure. The sound-insulating floating floor surface structure is characterized in that a damping sound-insulating layer (3) composed of an elastic damping sound-insulating pad and a PE (poly ethylene) plastic film paved on the same is arranged on the bearing floor (4), a floating layer (2) composed of fine stone reinforced concrete is arranged on the damping sound-insulating layer (3), and a building decorative surface layer (1) is arranged on the floating layer (2). The reinforced concrete floor serving as a combination of mass and the elastic damping sound-insulating pad is similar to a spring to form a vibration isolation system, the larger the mass of the surface layer is, the better the elastic damping sound-insulating pad is, the better the sound insulation effect is, floor impact sound pressure transmission can be reduced more effectively, and accordingly the sound insulation effect of a floor is improved greatly.

The invention discloses a metal roof secondary waterproof structure and a construction method. The metal roof secondary waterproof structure comprises a roof layer (1), a cavity layer (2), a secondary waterproof layer (3), a gutter (4), a main steel structure (5) and a stand column purlin hanger (6). The cavity layer (2) is located between the roof layer (1) and the secondary waterproof layer (3). The stand column purlin hanger (6) is supported on the main steel structure (5) for supporting the roof layer (1) and the secondary waterproof layer (3). The waterproof structure can prevent the phenomenon that the integrity of a coiled material is damaged by an aluminum alloy support needed by installing a metal panel, and further improves the waterproof performance of the metal roof, and the cavity layer, a heat preservation layer, a sound absorption layer and a steam isolation layer are arranged in the roof structure, so that the waterproof structure has the good sound-insulating, heat-preserving and damp-proof effects.

An acoustic enclosure includes a housing at least partially defining an acoustic chamber for an acoustic radiator. The housing further defines an acoustic opening from the acoustic chamber to a surrounding environment. The acoustic enclosure also has a first acoustic resonator and a second acoustic resonator. The first acoustic resonator and the second acoustic resonator are acoustically coupled with the acoustic chamber in parallel relative to each other. Each of the first acoustic resonator and the second acoustic resonator modifies a frequency response of the acoustic chamber. Loudspeakers can include such an enclosure acoustically excited or driven by an electro-acoustic transducer. As well, an electronic device can include such a loudspeaker.

A municipal soundproof noise-reduction bridge guardrail structure comprises a concrete base, a bottom plate, a top plate, curved connecting bars, an advertisement board, uprights bars, curved buffer pads, and an acoustic-absorption soundproof screen. The bottom plate is fixed onto the concrete base; the top plate and the bottom plate are connected and fixed through the upright bars; the advertisement board and the curved connecting bars are installed between the top plate and the bottom plate; the curved connecting bars are adhered with reflective bars; LED lamps are installed on the top plate; the curved buffer pads protruding outwards are arranged on the front side of the bottom plate; the acoustic-absorption soundproof screen is arranged on the side, close to the river side, of the guardrail structure. Compared with the prior art, the municipal soundproof noise-reduction bridge guardrail structure has functions of buffering, illuminating, soundproofing and noise reducing, besides the basic guarding function. As the guardrail structure is provided with the advertisement board, space of the guardrail is utilized effectively.

An energy efficient and quiet air cooling system for a building structure is provided. The air cooling system includes an evaporator system mounted in the wall of the building, a remotely mounted fan, an air intake, and a sound and heat insulating duct. The fan is mounted in the attic and configured to draw air from the living area of the building through the sound insulating duct with sufficient power to create a negative static pressure in the living area. The negative static pressure in turn causes outside air to flow through the evaporator system which removes heat from the outside air. The cooled air is in turn drawn into the building and pulled into the attic through the duct and expelled through the attic. The fan expels warm air into the attic, creating a positive pressure environment which causes the warm air to be expelled from the attic through natural vents.