166 results about "Acoustical insulator" patented technology

The object of the invention is to provide sound insulating members exhibiting both high vibration damping performance and high sound insulation performance, a vibration damping material for affording such members and a resin composition for forming the vibration damping material. The invention provides a first resin composition for vibration damping materials which contains 100 parts by weight of a chlorine-containing thermoplastic resin, and 20 to 200 parts by weight of a chlorinated paraffin having 12 to 16 carbon atoms on average. The thermoplastic resin contains preferably 20 to 70 wt. %, more preferably 30 to 70 wt. %, of chlorine. The chlorinated paraffin is preferably 30 to 70 wt. %, more preferably 35 to 65 wt. %, in chlorination degree.

Acoustical insulation for attenuating sound entering the passenger compartment of motor vehicles. The acoustical insulator comprises dual nonwoven layers in which one nonwoven layer is an airflow control layer and the second nonwoven layer is a support layer positioned between the cap layer and the sheet metal of the firewall separating the passenger and engine compartments. The areal density of the cap layer is less than the areal density of the support layer and, preferably, comprises polyethylene terephthalate (PET) fibers. The cap layer has a specific airflow resistance ranging from about 200 mks Rayls to about 1200 mks Rayls.

Embodiments of the present invention address aliasing problems by providing a plurality of discrete acoustic sensors along a cable whereby acoustic signals may be measured in situations where the fibre optic cable has not been secured to a structure or area by a series of clamps, as described in the prior art. Acoustic sampling points are achieved by selectively enhancing the acoustic coupling between the outer layer and the at least one optical fibre arrangement, such that acoustic energy may be transmitted selectively from the outer layer to the at least one optical fibre arrangement. The resulting regions of acoustic coupling along the cable allow the optical fibre to detect acoustic signals. Regions between the outer layer and the at least one optical fibre arrangement that contain material which is acoustically insulating further this enhancement since acoustic waves are unable to travel through such mediums, or at least travel through such mediums at a reduced rate.

An apparatus is disclosed for an improved acoustic panel comprising a sound absorbing member defined by a first and second face surface and a peripheral edge for absorbing sound from a sound source. A sound blocking member is defined by a first and second face surface and a peripheral edge for blocking the transmission of sound through the sound reducing panel. A first fire retardant spacing material is interposed between and affixed to the second face surface of the sound absorbing material and the first face surface of the sound blocking material. A second fire retardant spacing material having a first and a second face surface and a peripheral edge with the first face surface of the second spacing material is affixed to the second face surface of the sound blocking material. A fire retardant coating is affixed to the second face surface of the second spacing material.

The invention relates to a cast-in-place reinforced concrete hollow floor (plate) with both thermal insulation and sound insulation functions and a preparation method thereof. The hollow floor is prepared by concrete and a reinforcing steel bar poured together and is characterized in that the reinforcing steel bar consists of an upper layer of bar-mat reinforcement and a lower layer of bar-mat reinforcement; a grid space formed by a upper layer of reinforcing steel bar and a lower layer of reinforcing steel bar is filled with a spherical thermal insulation acoustic insulating material body; the diameter of the spherical thermal insulation acoustic insulating material body is less than the dimension of the grid formed by the upper layer of reinforcing steel bar and the lower layer of reinforcing steel bar that are bound horizontally and longitudinally; and the size of the spherical thermal insulation acoustic insulating material body accounts for 10-30% of the size of the grid space formed by the upper and the lower layers of reinforcing steel bars in longitudinal and horizontal directions. The thermal insulation material filled in the reinforced concrete hollow floor (plate) can improve the thermal insulation property of the reinforced concrete hollow floor (plate) and meanwhile, block up sound with certain wavelength from spreading, functioning in sound insulation. When being used for unidirectional and bidirectional load, the hollow floor has good bearing capacity.

The invention provides a sound-insulation shield of a compressor. The sound-insulation shield comprises a galvanized sheet casing, wherein a felt sound-insulation liner is arranged on the inner layer of the galvanized sheet casing. The sound-insulation shield adopts a double-layer structure, greatly increases the specific gravity of sound-insulation materials by matching the galvanized sheet casing with the felt liner, effectively enhances the sound-insulation effect, and insulates sharp noises of the compressor in high frequency. Products are integrally convenient to process and easy to mount and demount, and can be directly assembled and installed on the existing air conditioner outdoor units, and the integral stability and reliability in installation can be ensured. Simultaneously, production cost is saved.

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 down-like sound insulation material and a preparation method thereof. The down-like sound insulation material is prepared by compounding one or more of hollow polyester, hollow polypropylene, spandex, rubber fibers and PTT (polytrimethylene terephthalate) fibers and PP (polypropylene)/elastomer melt-blown superfine short fibers and then compounding upper and lower thin films. The down-like sound insulation material has a surface density of 50 to 500g/m<2>, a thickness of 5 to 50mm and a high-frequency sound absorption coefficient of more than 0.56. A lightweight, thinand efficient velvet-like sound insulation material is developed by improving existing melt-flowing equipment, and can be widely applied to lining materials of automobiles, acoustic screens, buildings and the like.

Disclosed is a method for manufacturing a soundproofing board part having improved sound absorption performance. The soundproofing board part is manufactured by using, as a material, a recycled soundproofing material which contains a polyurethane foam having excellent sound absorption performance and impact resilience during the press molding; and by producing a sound absorption part on the back surface of the soundproofing board part through a remolding processing method. Also disclosed is a soundproofing board part manufactured by the method.

Accordingly, sound absorption performance of the soundproofing board part is improved by about 20% or greater, manufacturing cost thereof may be reduced by recycled resources utilizing waste sheets, and manufacturing process may be simplified compared the related art.

The invention discloses a high-temperature-resistant and low-temperature-resistant soft sound insulation material. Vinyl elastomers (ethylene and alpha-olefin block copolymers), styrene block copolymers and damping elastomers are mainly used as base materials. The preparation method comprises the following steps: adding the raw materials into a preheated internal mixer for shearing and plasticizing, conveying the plasticized materials into a screw extruder, performing screw plasticizing, extruding the materials, extruding, stretching and shaping to obtain the high-temperature-resistant and low-temperature-resistant soft sound insulation material. In the high-temperature-resistant and low-temperature-resistant soft sound insulation material, the low-temperature glass transition temperaturesof the ethylene and alpha-olefin block copolymers and the styrene block copolymers are both-70 to-60 DEG C, and the low-temperature glass transition temperature of the damping elastomers is-80 to-60DEG C, so that the sound insulation material is ensured to have very excellent low temperature resistance; meanwhile, the ethylene and alpha-olefin segmented copolymers and the styrene elastomers arerelatively high in melting temperature, so that the sound insulation material is ensured to have excellent high-temperature resistance.

A housing for a smart speaker device, is formed, at least in part, from a sound absorbing material, a sound reflecting material, or both. The housing includes one or more doors which can be selectively opened or closed by an authorized person to permit the transmission of an externally generated voice signal to be received by the smart speaker device when the door is opened, and to prevent the receipt of any voice signal by the smart speaker device when the door is closed. The door can be controlled manually, or remotely by an external signal from a remote actuating device. The housing includes an internal electrical receptacle for electrically actuating the smart speaker device enclosed within the housing, and the internal electrical receptacle is coupled to a source of external electrical energy for powering the smart speaker device.

The invention provides a construction method of a fully furnished house sound-proof system. The construction method of the fully furnished house sound-proof system includes the following steps that 1) a foam vibration reduction sound-proof cushion is arranged on the floor in a laying mode. 2) A sound-proof plate is pasted on the wall surface. 3) A double-layer sound-proof window is installed. 4) An electric wire box is pre-embedded in the wall in an interval mode. Positions between a switch box and a switch box and the switch box and a pipe line on two sides of all the wall bodies are staggered mutually. 5) A sound-proof material is packed outside a pipeline. 6) A super silence water discharging pipe is installed. Compared with the traditional technology, the construction method of the fully furnished house sound-proof system has the advantages of being simple in constructing technology, convenient to install, short in construction period, low in cost and the like.

The invention discloses a recyclable sound insulation unit convenient to disassemble. The sound insulation unit comprises a square outer frame and a sound insulation material arranged inside the square outer frame. The upper and lower frames of the square outer frame are provided with connecting structure A and a connecting structure B respectively. The left and right frames of the square outer frame are provided with a connecting structure A and a connecting structure B respectively. The connecting structures A and the connecting structures B on the square outer frame of the sound insulationunit are used for being correspondingly connected with the connecting structures B and the connecting structures A of another sound insulation unit. Each connecting structure A comprises a limiting boss and a rotating locking mechanism, wherein the rotating locking mechanism comprises a rotating arm, a rotating shaft and a locking plate, the limiting boss is of a hollow structure with the open top, the rotating shaft is rotationally arranged between the inner side walls of the limiting bosses, one end of the rotating shaft stretches out of the corresponding limiting boss to be fixedly connected with the rotating arm, and the rotating shaft is sleeved with the corresponding locking plate. Each connecting structure B comprises a limiting groove and a locking groove, wherein the notch of thelocking groove communicates with the groove bottom of the limiting groove, and a locking table is formed at the joint of the locking groove and the limiting groove.

The invention discloses a sound insulation composite material and a preparation method thereof, and belongs to the technical field of material processing; the sound insulation composite material comprises the following raw materials in parts by weight: 120-180 parts of epoxy resin, 10-55 parts of modified hollow glass beads, 80-120 parts of a curing agent, 1-2 parts of an accelerator, and 10-18 parts of a toughening agent. By utilizing the excellent characteristics of low density, high strength, sound insulation, wave absorption and the like of the modified hollow glass beads, the modified hollow glass beads are compounded with the epoxy resin, so that the mechanical property of the matrix is improved, the density of the matrix is reduced, countless tiny cavities are constructed in the epoxy resin matrix, and the cavities endow the sound insulation composite material with excellent sound insulation performance. However, the density difference between the epoxy resin and the modified hollow glass beads is large, and macroscopic phase separation is likely to happen in the compounding process. The sound insulation composite material can block sound transmission and weaken projection sound energy, has the advantages of quite good sound insulation effect, light weight and low product cost, and is particularly suitable for being used as a sound insulation material of an automobile.

The invention discloses a coal ash plate interlayer sound insulation door sheet and a manufacturing method thereof. The door sheet comprises a coal ash plate, a sound insulation material, and a wood board. The coal ash plate contains wood fibers. The sound insulation material is a sound-proof felt. The wood board is one or more selected from finger-joint board, wood veneer, solid board, core-board, chipboard, density board, plywood, and fibreboard. The door sheet is manufactured through respective tailoring, cutting, polishing, gluing, and a hot pressing technology. The coal ash plate and the wood board are combined to enhance flintiness of a wooden door, and use ratio of coal ash is improved. The sound-proof felt arranged between the door sheets can absorb large amount of audio frequency. Since the coal ash plate is large in density, and hard in material, and the surface is polished into a regular wavy form, so audio frequency which is not absorbed by the sound-proof felt can be reflected, so as to actually effectively improve sound-absorbing and sound insulating effects.

A sound insulation sleeve for microphone noise reduction comprises a sound pickup cavity 1, the sound pickup cavity 1 is in a cone shape with openings at the two ends, a small bottom opening of the sound pickup cavity 1 is connected with a microphone containing cavity 4 with an opening in the top, and the sound pickup cavity 1 and the microphone containing cavity 4 are both formed by sound insulation materials in a surrounding mode. The invention further discloses a microphone structure which comprises the sound insulation sleeve and a microphone which is located in the microphone containing cavity 4, and a sound head of the microphone faces the joint of the pickup cavity 1 and the microphone containing cavity 4. According to the sound insulation sleeve, the conical pickup cavity is designed at the front end of the rubber sleeve; the front-end pickup effect of the microphone is effectively improved, the conical structure suppresses low-angle noise at the same time, the noise reductioneffect is obvious in the speech recognition application environment, the rear-end recognition rate is improved, and the sound insulation sleeve is simple in structure, low in cost, capable of being disassembled, assembled and used and convenient to install on various microphone devices.

The invention provides a heavy acoustic material with lead-zinc tailings, which contains lead-zinc tailings coarse grains the grain size of which is between 4 and 6 millimeters, lead-zinc tailing medium grains the grain size of which is between 2 and 3 millimeters, lead-zinc tailing fine grains the grain size of which is smaller than 1 millimeter, hard asphalt, and soft asphalt. The invention also provides a method for producing the heavy acoustic material with the lead-zinc tailings and an acoustic board using the acoustic material. The materials of the invention belong to heavy materials, and the densities of formed acoustic barriers are more than 200 kilograms per square meter to have good effect on sound insulation. At the same time, the asphalt is viscoelastic materials and has good damping performance, and the heavy acoustic materials prepared from the lead-zinc tailings which are used as main aggregates have good acoustic performance, are moisture-proof and cheap, and are convenient for construction. If the heavy acoustic material is measured in terms of the internal damping of an asphalt layer, the loss factor (percent) thereof can reach between 20 and 40 percent. At the same time, a porous sound-absorbing material synthesized from the lead-zinc tailings obtained through frothing treatment can be more widely used in sound insulation for various buildings.

A sound-insulation material for a vehicle has high rigidity and is capable of exhibiting sufficient sound insulation performance against noise having a frequency of 500 Hz to 5000 Hz generated in a vehicle, while maintaining low weight. The sound-insulation material for a vehicle of the present invention has a multilayer structure, the material including: a hard layer having tubular cells, the tubular cells being arranged in a plurality of rows; and a soft layer provided on one surface of the hard layer, in which a ratio of a dynamic spring constant Kd to a static spring constant Ks, of a structure having the hard layer and the soft layer, is 0<Kd/Ks≤1.5.