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177 results about "Acoustical insulator" patented technology
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Resin composition for vibration-damping material, vibration-damping material, and sound-insulating member
InactiveUS7041377B2Reduce nipping temperatureGood release effectOther chemical processesFibre treatmentPolymer scienceChlorinated paraffins
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.
Owner:SEKISUI CHEM CO LTD
Acoustical insulation for motor vehicles
InactiveUS20060289230A1Reducing audibilitySave a lot of costWallsSynthetic resin layered productsFiberPolyethylene terephthalate
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.
Owner:INT AUTOMOTIVE COMPONENTS GRP NORTH AMERICA INC
Non-isotropic acoustic cable
ActiveUS20160223389A1Enhance acoustic couplingCost-effective and convenient to useSubsonic/sonic/ultrasonic wave measurementForce measurement by measuring optical property variationEngineeringOptical fiber cable
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.
Owner:SILIXA
Fire resistant acoustic panel
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.
Owner:JOHNSON LAHNIE
Soundproof material for vehicle
ActiveUS8464830B2Low production costLamination ancillary operationsLayered product treatmentCompression moldingEngineering
Owner:TAKEHIRO CO LTD
Prefabricated sound attenuating wall system
A partially prefabricated sound attenuating partition construction, for the construction of partitions in buildings, and other sound attenuating structures. The partition has two panel assemblies of vertical members defining opposite sides thereof, with a hollow interior. The panels are received in upper and lower generally L-shaped receivers mounted to receive the panel assemblies. A sound attenuating curtain of flexible material is supported from one of the panel assemblies. The sound attenuating curtain is spaced from the second of the panel assemblies by a predetermined air space. A sound attenuation acoustical batting insulation mounted on the other panel assembly within the hollow interior, and, a predetermined airspace between the acoustical batting insulation and the sound attenuating curtain.
Owner:DODD MURRAY B
Sound insulation material, composite carpet using the material and preparation method thereof
ActiveCN104629218AHigh affinityEvenly distributedLayered product treatmentSynthetic resin layered productsInsulation layerSulfate
The invention belongs to the technical field of sound insulation polymer composite materials and preparation thereof, and particularly relates to a high sound insulation composite carpet and a preparation method thereof. The composite carpet is provided with a carpet layer, a composite sound insulation layer is arranged below the carpet layer, and the sound insulation layer is prepared from a sound insulation material containing the following components: 100 parts of PVC resin, 10-60 parts of a plasticizer, 1-6 parts of a stabilizer, 30-90 parts of sound insulation function body particles, 0-100 parts of a filler and 1.3-9 parts of additives. The sound insulation function body particles comprise two or more of carbonate, sulfate, hydroxide, oxide and metal powder. The carpet provided by the invention has all the functions of a universal carpet, but also has an outstanding high sound insulation property, and the sound reduction index is as high as 40 dB. The carpet is environment-friendly, non-toxic and pollution-free, and a thermoplastic matrix can be recycled. The production process of the product is simple, and the application is extensive.
Owner:浙江富华新材料科技有限公司
Soundproof structure and soundproof structure manufacturing method
ActiveUS20170341186A1Increase massHigh stabilitySound proofingSound producing devicesFrequency bandEngineering
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.
Owner:FUJIFILM CORP
Cast-in-place reinforced concrete hollow floor (plate) with both thermal insulation and sound insulation functions and preparation method thereof
ActiveCN102134888AImprove insulation effectPlay a sound insulation effectFloorsHeat proofingThermal insulationRebar
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.
Owner:JIANGSU RUIYONG CONSTR ENG TECH
Multi-layer sound insulation pad for automobile and manufacture method thereof
InactiveCN102336167APromote absorptionAct as a skeletonLaminationLamination apparatusUltrasound attenuationEngineering
The invention relates to a multi-layer sound insulation pad for an automobile and a manufacture method thereof. The multi-layer sound insulation pad is composed of 2-3 layers of sound insulation pads with different densities. Various layers of sound insulation materials are bonded through a binder. The manufacture method comprises the following steps of: manufacturing a low-density sound insulation pad and a high-density sound insulation pad by using the conventional method, and heating to soften the sound insulation pads; then, coating the binder at the bonding position, and arranging the sound insulation materials in a forming mould in turn; and finally, closing the mould and pressing the sound insulation materials to obtain the multi-layer sound insulation pad for the automobile. Compared with the prior art, the multi-layer sound insulation pad has the absorption and attenuation functions on high-frequency and low-frequency noises; therefore, the integral noise reduction function is increased; and the high-density layer can also have the framework function.
Owner:SHANGHAI XINAN CAR DEADENING FELT
Acoustical insulator for a vehicle
An acoustical and thermal insulator provided which is suitable for use in a vehicle. The insulator includes a nonlaminate acoustical and thermal insulating layer of blend of polymer fibers and natural fibers. The fiber blend provides a lower cost material with similar acoustical, thermal properties. The insulator includes a relatively high density, nonlaminate layer of the fiber blend and / or one or more facing layers constructed from various materials.
Owner:OWENS CORNING INTELLECTUAL CAPITAL LLC
Sound-insulation shield of compressor
InactiveCN103234243AProportionally largeImprove sound insulationPositive displacement pump componentsLighting and heating apparatusClassical mechanicsNoise
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.
Owner:QINGDAO HISENSE HITACHI AIR CONDITIONING SYST
Electric wave darkroom capable of carrying out acoustic testing and building method thereof
ActiveCN101444758AAvoid duplicationReduce engineering construction costsEnclosures/chambersSound proofingElectromagnetic compatibilityEngineering
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.
Owner:STATE GRID ELECTRIC POWER RES INST
Anti-Vibration Sound Insulator for Suspended Ceiling
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.
Owner:TION SOPREMA CANADA INC HLDG SOPREMA CANADA
Sound-proof material and process for production thereof, sound-proof molding, and sound insulation method
ActiveUS20140027200A1Improve rigidityLow modulusSound proofingSound producing devicesSound sourcesYoung's modulus
The present invention relates to a sound-proof material containing a first sound-absorbing material disposed facing a sound source, a first soft sound-insulating layer laminated on a face of the first sound-absorbing material opposite to the sound source and having an air permeability measured in accordance with JIS L1018 of 10 cc / cm2·sec or lower, a second sound-absorbing material laminated on the first soft sound-insulating layer, and a second soft sound-insulating layer laminated on the second sound-absorbing material and having an air permeability measured in accordance with JIS L1018 of 10 cc / cm2·sec or lower and a Young's modulus measured in accordance with JIS K7127 greater than or equal to five times that of the first soft sound-insulating layer, in which at least the second soft sound-insulating layer is partially or entirely bonded to the second sound-absorbing material.
Owner:NICHIAS CORP
Down-like sound insulation material and preparation method thereof
InactiveCN107571561AOvercome perishableGood damping sound insulation and rebound effectSpinning head liquid feederLaminationPolypropyleneHigh frequency
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.
Owner:NANTONG UNIVERSITY
Method for manufacturing soundproofing board part having excellent sound absorption performance and soundproofing board part manufactured by the same
ActiveUS20160035338A1Simplified and and price-competitive processImprove sound absorptionCeramic shaping apparatusWood veneer joiningAcoustic boardMechanical engineering
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.
Owner:HYUNDAI MOTOR CO LTD +1
High-temperature-resistant and low-temperature-resistant soft sound insulation material and preparation method thereof
PendingCN111925624AImprove low temperature resistanceImprove high temperature resistanceElastomerPolymer science
Owner:ZHUZHOU TIMES NEW MATERIALS TECH
Waterproof sound insulation coating and preparation method thereof
The invention provides a waterproof sound-insulation coating. The waterproof sound-insulation coating contains modified basalt fibers and a nano-scale inorganic substance with a porous structure at the same time. The modified basalt fibers can be uniformly distributed after the coating forms a film, so that transmitted sound wave energy is reduced, and a sound insulation effect is achieved. The nano-scale inorganic matter has a large number of micropores, so that the nano-scale inorganic matter has good adsorption performance. A sound absorption material and a sound insulation material are overlaid, a good sound insulation effect is generated, and the impact sound pressure level improvement amount can be increased to 20-27 db and is far higher than that of an existing product. Meanwhile, the product has better tensile strength, elongation at break and impermeability, and is a waterproof coating with better performance and higher flexibility.
Owner:HAINAN TAIHOO TECH CO LTD
Method for manufacturing recoverable, nontoxic, nonflammable acoustic insulating material and its structure
InactiveCN1498916AImprove performanceImprove qualitySound proofingFlooring insulationsMolecular materialsNatural mineral
A non-toxic incombustible sound insulating material able to be recovered is prepared from high-molecular olefin material, natural minerals as filler, mineral oil, and high-molecular polymer as assistant through proportional mixing, stirring, pugging twice, extruding out, rolling to become plate, and cutting according to needed sizes. Its advantages are high sound insulating performance and no environmental pollution.
Owner:福州和胜汽车配件有限公司
Acoustic Insulator For Smart Speaker Devices
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.
Owner:HIVE SECURITY LLC
Construction method of fully furnished house sound-proof system
ActiveCN103114692ALow costFast constructionCovering/liningsDomestic plumbingSwitch boxClassical mechanics
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.
Owner:LONGXIN CONSTR GRP
Heart sound whisht baby instrument
InactiveCN101176807AAppease effectiveIn line with the principles of human physiologyAlarmsSleep inducing/ending devicesRadio receptionHeart sounds
The invention relates to a heart sound apparatus for quieting baby, comprising a heart sound play apparatus and a wireless receiving and warning device with a split-type structure, and the signals are transmitted by wireless radio; wherein, the heart sound apparatus is characterized in that: a sound sensor is connected with the bottom of a sound collecting apparatus; a sound insulation material is enwrapped around the outer surface; the sound sensor is connected in series with an anode of amplifying circuit, a filter circuit and a trigger circuit in turn, and an adjustable resistance is connected in series with the negative feedback end of the amplifying circuit; simultaneously, the heart sound recording and playing apparatus and a timing start switch are connected in parallel with the other end of the trigger circuit; the timing start switch is connected with the wireless emitter; the heart sound recording and playing system comprises a heart sound recording and playing chip; a heart sound recording port is arranged on the heart sound recording and playing chip; the output of the heart sound is successively connected with a power amplifier and a loudspeaker, and the wireless receiving and warning device is connected with the wireless receiver and a buzzer. The invention has the advantages of detecting the crying sound accurately, playing the heart sound from mother for quieting baby, transmitting the wireless signals to alarm, and announcing parents in time when quieting baby is failed.
Owner:UNIV OF SHANGHAI FOR SCI & TECH
Soundproof door for use in reduction of sound transmitted from one side of the door to the other side
ActiveUS10378273B2Reduce transmissionImprove sound insulationLayered productsNoise insulation doors/windowsEngineeringBack door
A soundproof door assembly for use in reduction of sound transmitted from one side of the door to the other side, having an STC number at least STC 36 determined in accordance with ASTM E413-10 and E90-09, comprising a soundproof door having a thickness of 30-80 mm, which comprising two door skins, one formed as a front door skin and the other formed as a rear door skin for the soundproof door respectively; a quadrilateral frame, constituted by a top rail member, a bottom rail member, a left stile member and a right stile member to seal the perimeter of the door skins; and a multiple-layered core, to form a concrete inner portion of the door, which comprising three layers of a hard-soundproof material that blocks sound with high frequency over 500 Hz, wherein each of the door skins includes an aperture aligned and devoid of any soundproofing core thereby forms a window of the soundproof door for accommodation of a glass pane.
Owner:NANYA PLASTICS CORP
Hard foam
InactiveUS20100249259A1Improve heat resistanceHigh mechanical strengthPeptide preparation methodsOrganic acidPolymer science
A hard foam formed from a carboxylic acid ester-based polymer having a ring structure, the hard foam being obtained by heating the carboxylic acid ester-based polymer having a ring structure to generate a gaseous organic acid from the carboxylic acid ester-based polymer, and foaming the heated carboxylic acid ester-based polymer with the gaseous organic acid, and a method for producing the same. The hard foam can be used as various heat insulating materials, various vibration isolators, various acoustic materials, various soundproof materials and the like. Therefore, the hard foam is expected to be used for automobile component materials, materials for airplanes, materials for the space field, materials for industries, materials for medical assistance, and the like.
Owner:JAPAN ADVANCED INST OF SCI & TECH
Recyclable sound insulation unit convenient to disassemble
PendingCN111021565AFirmly connectedEasy to assemble and disassembleSound proofingEngineeringAcoustical insulator
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.
Owner:四川贝强声学工程有限公司
Sound insulation composite material and preparation method thereof
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.
Owner:吴娟
Coal ash plate interlayer sound insulation door sheet and manufacturing method thereof
InactiveCN105569506AIncrease profitHigh hardnessLaminationNoise insulation doors/windowsFiberWood veneer
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.
Owner:HEILONGJIANG HUAXIN FURNITURE
Sound insulation sleeve for microphone noise reduction and microphone structure
InactiveCN110913292AImprove the front-end pickup effectImprove pickup effectMouthpiece/microphone attachmentsNoisePickup
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.
Owner:成都启英泰伦科技有限公司
Heavy soundproof material, producing method thereof and baffles using the same
InactiveCN101423359AProtect environmentHigh densitySolid waste managementNoise reduction constructionAcoustic boardFroth treatment
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.
Owner:北京开云科技有限公司
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