26 results about "Metal sound" patented technology

The utility model belongs to the technical field of sound barriers, and particularly relates to a composite nonmetal sound barrier unit plate. The non-metal sound barrier unit plate comprises a back plate formed by pouring concrete and a face plate made of ceramic particle sound absorption materials, the back plate and the face plate are connected through a damping deformation layer, and the face plate can float relative to the back plate in a damping mode after being impacted by a load. The sound absorption panel of the non-metal sound barrier unit plate can perform damping floating relative to the back plate, so that the non-metal sound barrier unit plate is more impact-resistant and fatigue-resistant, and has the characteristics of high structural strength, lasting vibration and noise reduction effects and long service life.

The utility model discloses an I-type unit plate of a plugboard type metal sound barrier, and relates to the field of sound shielding. Comprising two main beam profiles which are symmetrically arranged up and down; the multiple middle keels are sequentially and fixedly connected between the two main beam profiles in parallel, round through holes are formed in the middle keels, and the ends of the round through holes can be fixedly connected with the corresponding main beam profiles; the sound absorption assembly is arranged in a mounting area formed by the middle keel and the main beam profile; the face and back plate assemblies are arranged on the front side and the rear side of the sound absorption assembly, the upper ends and the lower ends of the face and back plate assemblies are fixedly connected with the corresponding main beam sectional materials respectively, and ethylene-propylene-diene monomer foaming rubber strips are arranged between the face and back plate assemblies and the main beam sectional materials. The end sealing heads are symmetrically fixed to the left side and the right side of the face back plate assembly, and the suspension inhaul cables can penetrate through cavities between the end sealing heads and the adjacent middle keels. The metal sound barrier can prevent the falling risk caused by the problems of displacement, accidental impact, size measurement and the like, and is used for prolonging the fatigue service life of the metal sound barrier.

To facilitate the procurement of materials and to improve workability.SOLUTION: An outer sound absorbing material 31 fitted to close an end space below the expansion device 29 at both ends in the longitudinal direction of the expansion gap 23 corresponding to the width direction of the bridge, and an inner sound absorbing material 41 fitted to close an internal space sandwiched between the end spaces in the expansion gap 23 are provided. A main body 32,42 of the outer sound absorbing material 31 and the inner sound absorbing material 41 is formed of a sound absorbing sponge, and at least a main body 42 of the inner sound absorbing material 41 has a structure in which a mat-like sound absorbing sponge is equally folded in two. The inner sound absorbing material 41 is formed so that the length of a part corresponding to the longitudinal direction of the expansion gap part 23 is shorter than a half of the longitudinal length of the expansion gap part 23, and a plurality of inner sound absorbing materials 41 are fitted while being supplemented. A sound insulation layer 33,43 made of metal is formed on the outer surfaces of the outer sound absorbing material 31 and the inner sound absorbing material 41, which are exposed to the outside when the outer sound absorbing material 31 and the inner sound absorbing material 41 are fitted into the expansion gap 23.SELECTED DRAWING: Figure 1

The present application relates to the technical field of layered polymer composite material, and discloses a layered composite noise reduction material for sound barrier and a preparation method thereof, the noise reduction material is an integrated composite structure with a functional skin and a sound absorption core material; the functional skin is prepared by reaction of a first premix containing a first polyether polyol, an aliphatic polyol modified polyether amine and a phosphate ester polyol; the sound absorption core material is prepared by reaction of a second premix containing a second polyether polyol and an epoxy-terminated polysiloxane; the preparation method adopts an integrated forming process, the first premix is applied in a mold, and when it reaches a gel state but has not completely solidified, the second premix is injected for co-solidification forming; the present application solves the problem of interlayer separation, the aliphatic polyol modified polyether amine endows the skin with excellent toughness and weather resistance, and the epoxy-terminated polysiloxane ensures high porosity and sound absorption performance of the core material, the material has stable structure and balanced performance, and is suitable for fields such as metal sound barrier.

The application belongs to the technical field of piezoelectric thin film hetero-integration, and particularly relates to a PMN-PT piezoelectric single crystal thin film heterostructure with a metal acoustic wave reflection layer, a preparation method and application thereof. The PMN-PT piezoelectric single crystal thin film heterostructure comprises a silicon substrate, a silicon dioxide insulating layer, a high acoustic impedance metal intermediate layer and a lead magnesium niobate piezoelectric single crystal thin film layer. The lead magnesium niobate piezoelectric single crystal thin film layer is a lead in niobate-lead magnesium niobate-lead titanate single crystal thin film or a lead magnesium niobate-lead titanate single crystal thin film. Compared with the prior art, the PMN-PT piezoelectric single crystal thin film heterostructure can highly localize acoustic wave energy in the piezoelectric single crystal thin film, significantly suppress acoustic wave energy leakage to the substrate, and solve the acoustic leakage, vertical electric field loss and thermal stress mismatch bottleneck of the conventional piezoelectric hetero-integration technology.

This invention discloses a method and system for tracing the entire lifecycle status of a metal sound barrier, belonging to the field of status tracing technology. The method specifically includes: acquiring raw data of the entire lifecycle of the metal sound barrier; constructing a time-series feature vector based on the raw data; parsing the time-series feature vector to generate a preliminary tracing result; performing anomaly correlation judgment on the preliminary tracing result; generating an enhanced tracing tag when anomalies exist; and constructing a full lifecycle tracing chain based on the enhanced tracing tag and the preliminary tracing result to perform full lifecycle status tracing of the metal sound barrier. This application enables the sound barrier to have a traceable status chain from manufacturing to final service state, which is beneficial for maintenance decisions, controllable service status, and damage evolution assessment.

The utility model discloses a music turntable display device, which comprises a transparent plate, a side wall ring, a sound production plate and a turntable bearing, sound production needles are mounted on the sound production plate, and balls are placed on the sound production plate. According to the utility model, the side wall ring and the sounding plate are fixedly connected, the side wall ring and the transparent plate installed above define the closed main body, then the closed main body is integrally and rotatably connected with the turntable bearing, the turntable bearing is installed and fixed on the bracket, and the bracket is integrally installed and fixed on the support frame, so that the whole body formed by the side wall ring and the sounding plate can freely rotate within the range of 360 degrees; during demonstration, the side wall ring is rotated, so that the steel balls on the sounding plate impact the metal sounding needles with different lengths at different positions in the rotating process, and then a fair sound melody is made; the demonstration device is simple in overall structure and reliable in protection, the internal structure still has high stability after being used for many times, the demonstration device can be placed in public places such as science and technology museums for demonstration and free interaction, and the maintenance cost and the maintenance frequency are reduced.

The utility model discloses a fiber toughening nonmetal sound barrier curing kiln which comprises a kiln body, the kiln body is provided with a kiln door, an inner cavity of the kiln body is provided with a curing portion and a heating portion, the heating portion is located on any one side or multiple sides of the periphery of the curing portion, the curing portion comprises a base arranged at the bottom end of the inner cavity of the kiln body, and the base abuts against a plurality of placing frames. The heating part comprises a pipe frame, the pipe frame is provided with a heat exchange pipe connected to an external heating medium generating device, and a plurality of cooling fins are arranged on the outer side face of the heat exchange pipe at intervals. The positions of every two vertically-adjacent placing frames are locked through the positioning pieces, the situation that the multiple placing frames are staggered, inclined and toppled when the multiple vertically-stacked placing frames are transferred is prevented, and the number of the placing frames is flexibly adjusted according to the number of the sound barriers. The contact area of the heat exchange pipe and air in the inner cavity of the kiln body is increased through the cooling fins, heat provided by a heating medium is fully utilized, the heating efficiency of the inner cavity of the kiln body is improved, and the heating time is saved.

The utility model discloses an upright combined sound barrier plate, which belongs to the technical field of sound barrier plates and comprises a base, a plurality of H-shaped steel columns are fixedly mounted at the top of the base, and the H-shaped steel columns are fixedly mounted at the bottom of the base. A first metal sound absorption and insulation board, a second metal sound absorption and insulation board, an acrylic sound insulation board, a third metal sound absorption and insulation board and a fourth metal sound absorption and insulation board are sequentially clamped between every two adjacent H-shaped steel stand columns from bottom to top. The first metal sound absorption and insulation board, the second metal sound absorption and insulation board, the third metal sound absorption and insulation board and the fourth metal sound absorption and insulation board can be combined to form a sound barrier board to replace a traditional overall sound insulation barrier board, so that only parts at damaged positions are replaced when local damage occurs, resource waste caused by overall replacement is avoided, production cost is reduced, and production efficiency is improved. And meanwhile, the water-permeable sound-absorbing block is additionally arranged at the gap between the base and the first metal sound-absorbing and insulating plate, so that the joint has the water-permeable effect and also has the sound-absorbing and noise-reducing effects.

The utility model relates to the technical field of sound barrier production and processing, and particularly discloses a fiber toughening non-metal sound barrier cutting machine which comprises a rack, a sliding cutting part is arranged on the rack, a cutting blade is arranged on the sliding cutting part, and at least two fixed rotating rollers for tensioning and supporting a conveying belt are arranged at the two ends of the rack. The front side and the rear side of the sliding cutting part are each provided with a plurality of sliding rotating rollers, the multiple sliding rotating rollers are installed on the rack and can slide front and back in the length direction of the rack, the conveying belt is arranged and penetrates through the sliding cutting part, and one of the fixed rotating rollers is in power connection with a power device driving the conveying belt to rotate. The sliding cutting part is provided with a plurality of steering tensioning rotating rollers which are used for enabling the conveying belt to penetrate through the conveying face of the sliding cutting part section to sink downwards, and the cutting piece is located above the sunken part of the conveying belt. The sound barrier cutting machine is provided with the conveying belt and the power device for driving the conveying belt to rotate, the equipment cost is reduced, and the sliding cutting part can synchronously slide and cut along with a sound barrier.

The invention discloses a metal sound absorber sound barrier design method and device, equipment, a medium and a product, and relates to the technical field of noise control, and the method comprises the steps: determining a target frequency band based on a target sound source; establishing a thermal viscosity-pressure acoustic coupling simulation model of the sound barrier; establishing a model database; scanning the sound barrier thermal viscosity-pressure acoustic coupling simulation model based on the data of the model database, and establishing a simulation database; comparing the sound absorption coefficient obtained by the simulation database with the sound absorption coefficient obtained by the existing theoretical model, and if a deviation exists, correcting the sound absorption coefficient of the simulation database; the maximum noise reduction coefficient and the maximum maximum effective sound absorption bandwidth in the target frequency band serve as optimization targets, and the optimal design parameters and expected performance of the metal sound absorber sound barrier are obtained. Core parameters such as the double-layer distance, the back cavity depth and the micropore diameter can be flexibly adjusted based on the target vibration frequency band, and it is guaranteed that the performance of the sound absorber is optimal.

The invention discloses welding equipment for metal sound barrier machining, and belongs to the technical field of welding equipment. The supporting legs are fixedly connected to the bottom of the [-shaped seat; and the placing plate is fixedly connected to the inner side of the [-shaped seat. By means of a set of ingenious linkage transmission mechanism combining the worm gear, the worm, the ratchet wheel, the pawl and the reciprocating lead screw, automatic execution and switching of the cutting function and the welding function are achieved. According to the design, only one motor is needed for driving, after groove cutting is completed, the cutting milling cutter can be automatically switched into the welding gun, the welding process is immediately started, and the process conversion efficiency from cutting to welding and the automation degree are greatly improved. Meanwhile, a ratchet wheel and pawl mechanism ensures unidirectivity and reliability of tool switching, accidental rotation in a non-switching state is effectively prevented, the stability and safety of the operation process are ensured, and therefore the overall efficiency and precision of welding machining of the metal sound barrier are remarkably improved.

The invention relates to the technical field of sound barriers, and particularly discloses ceramsite for a metal sound barrier and a preparation method of the ceramsite. The ceramsite for the metal sound barrier comprises an inner core and a waterproof layer, and the inner core comprises the following materials in parts by weight: 100 parts of fly ash; 20 parts of cement; 8 parts of calcined gypsum; 4 parts of quick lime; 6-8 parts of expanded perlite; 2.5 to 7.5 parts of hydrogen peroxide; the waterproof layer is prepared from a waterproof coating; the waterproof coating comprises the following materials in parts by weight: 5 parts of epoxy resin; 2 parts of PDMS; 1.7 parts of triethylene tetramine; 0.3 part of a curing agent; 0.3 to 0.5 part of titanium dioxide; 35 parts of a solvent; the preparation method comprises the following steps: S1, preparing the inner core; s2, preparing a waterproof coating; s3, ceramsite preparation. The ceramsite can be used in a metal sound barrier, and has the advantages of water resistance, corrosion resistance, high strength and good sound absorption and noise reduction effects.

The utility model belongs to the technical field of sound barriers, and particularly relates to a railway inserting plate type metal sound barrier III-type unit plate. The novel metal sound barrier unit plate comprises a main beam, an edge beam and a unit plate arranged between the main beam and the edge beam, the main beam and the edge beam are each provided with a labyrinth type clamping groove, the clamping grooves are used for inserting and positioning sound absorbers of the unit plate, each labyrinth type clamping groove comprises a groove wall composed of two opposite vertical plates and a labyrinth cavity formed in the groove bottom, transverse plates are arranged on the inner sides of the vertical plates, and the transverse plates are arranged on the inner sides of the vertical plates. The transverse plate and the groove bottom are provided with protrusions distributed at intervals, the protrusions of the transverse plate and the groove bottom are staggered to form a labyrinth cavity, and a through opening of the labyrinth cavity is formed in the inner side of the transverse plate. The novel metal sound barrier unit plate can quickly and effectively absorb high-speed rail pulsating airflow and noise impact, the sound absorption and noise reduction effect is long-acting and stable, and the novel metal sound barrier unit plate has the advantages of being compact in structure, stable in connection, economical and durable.

The utility model discloses a fiber toughening nonmetal sound barrier length trimming device which comprises a rack, the rack is provided with a conveying belt which is driven by a first driving device and used for conveying a sound barrier, and the rack is provided with a first cutting blade which is driven by a second driving device and used for cutting the sound barrier on the conveying belt. The first cutting blade can be close to and away from a sound barrier located on the conveying belt in the front-back direction and the left-right direction, the conveying belt comprises a belt body, the belt body makes contact with the sound barrier through a plurality of protrusions arranged on the outer surface, and the machine frame is provided with a limiting mechanism. The top ends of the protrusions are located above the top end of the belt body, when the first cutting blade cuts to the bottom of the sound barrier, the bottom of the first cutting blade makes contact with the protrusions or the bottom of the first cutting blade is located in the interval between the adjacent protrusions, the first cutting blade is prevented from making direct contact with the belt body, and the overall structural stability of the belt body is guaranteed. The limiting mechanism prevents the sound barrier from displacing when the sound barrier is cut by the first cutting blade.

The utility model relates to the technical field of environmental protection engineering, in particular to an anti-falling U-shaped rubber strip for a ceramsite sound absorption metal sound barrier, the anti-falling U-shaped rubber strip for the ceramsite sound absorption metal sound barrier comprises a shell and a sound absorption plate, the sound absorption plate is located in the shell, and two protruding parts extend downwards from the top wall in the shell; the sound absorption plate is arranged between the two protruding parts. A buffer pad is arranged between the two protruding parts, the buffer pad comprises an abutting part and a clamping part, and the abutting part is arranged between the interior of the shell and the top wall of the acoustic board; the number of the clamping parts is two, the two clamping parts are symmetrically arranged on the two sides of the abutting part, and each clamping part is located in the gap between the protruding part and the sound absorption plate. The ends, deviating from the abutting part, of the two clamping parts are tilted in the direction deviating from each other to form a tilted part, the tilted parts interfere with the protruding parts, and the effect that the buffer strips are prevented from falling off from the top wall of the acoustic board through the interior of the shell is achieved.

The utility model relates to the field of road traffic noise prevention and control, in particular to a rainwater diversion metal barrier unit plate which comprises a unit plate shell, sound absorption materials are arranged in the unit plate shell, a plurality of sound absorption holes are formed in one side wall of the unit plate shell, and the sound absorption holes are in a long strip shape and are arranged in the length direction of the unit plate shell. A rainwater diversion trench is arranged above each sound absorption hole, the length of the rainwater diversion trenches is larger than that of the sound absorption holes, the rainwater diversion trenches are fixed to the unit plate shell, the trench bottoms of the rainwater diversion trenches are in a slope form with the middle higher than the two sides in the length direction, and the trench bottoms of the rainwater diversion trenches are in a slope form with the inner side higher than the outer side in the width direction. Normal sound absorption and insulation work of the metal sound barrier in rainy days is guaranteed, the sound absorption performance stability and durability of the sound barrier are improved, and the service life of the sound barrier is prolonged.

The utility model belongs to the technical field of metal sound barriers, and particularly relates to a novel inserting plate type metal sound barrier unit plate. The metal sound barrier unit plate comprises a cavity formed by a face plate, a back plate and edge beams, a sound absorber is installed in the cavity, the sound absorber is composed of a honeycomb structure block and a viscoelastic fluid filling layer arranged in the honeycomb structure block or the sound absorber is composed of a rock wool core layer and a sound transmission plate clamping the rock wool core layer, irregular cavity gaps are distributed in the sound transmission plate, and the irregular cavity gaps are distributed in the cavity. In the cavity, a front reverberation chamber is formed between the sound absorber and the panel, and a rear reverberation chamber is formed between the sound absorber and the back plate; the metal sound barrier unit plate is provided with a composite sound absorption system and has the advantages of being long-acting and stable in sound absorption and noise reduction, firm in structure, economical and durable.

The utility model discloses a pneumatic jumbolter silencer which comprises a shell, a baffling channel and a throttling baffle. An air inlet and an exhaust port are formed in the shell, a baffling channel is arranged between the air inlet and the exhaust port, a plurality of throttling baffles are fixed in the baffling channel, and sound absorption materials are fixed on the throttling baffles; and the exhaust port is covered with a metal sound insulation net. The device has the advantages that when the pneumatic jumbolter works, compressed air enters the device from the air inlet and is sequentially baffled through the bottom channel and the side wall channel, the speed of the compressed air is reduced, and when the compressed air passes through the throttling baffle in the side wall channel, the airflow speed is reduced, and noise is reduced; when air flow passes through the sound absorbing material on the throttling baffle and the metal sound insulation net outside the exhaust port, noise is further absorbed and blocked and is finally exhausted from the exhaust hole, and the noise of the exhausted air is greatly reduced at the moment.

The invention discloses a metal sound barrier full-life-cycle state tracing method and system, and belongs to the technical field of state tracing, and the method specifically comprises the steps: obtaining full-life-cycle original data of a metal sound barrier, constructing a time sequence feature vector based on the full-life-cycle original data, and analyzing the time sequence feature vector to obtain a metal sound barrier full-life-cycle state tracing result; the method comprises the steps of generating a primary traceability result, performing abnormal association judgment on the primary traceability result, generating an enhanced traceability label when an abnormality exists, constructing a full-life-cycle traceability chain based on the enhanced traceability label and the primary traceability result, and performing full-life-cycle state traceability on the metal sound barrier; according to the method, the sound barrier has a traceable state chain from the manufacturing source to the final service state, and maintenance decision, service state controllability and damage evolution judgment are facilitated.

The utility model discloses a closely-spliced aluminum veneer with corrosion-resistant and sound-insulation functions, which comprises a closely-spliced aluminum veneer body, a connecting component is arranged on the closely-spliced aluminum veneer body, and a component convenient to replace is arranged on the outer side of the closely-spliced aluminum veneer body. The metal sound insulation body, the bolt and the vacuum area are arranged, after the sound insulation effect of the metal sound insulation body is reduced in the long-time using process, gas in the vacuum area is pumped out through cooperation of the vacuum machine and the one-way valve, then the sound insulation effect of the metal sound insulation body can be achieved, meanwhile, the closely-spliced aluminum veneer body is protected, and the service life of the closely-spliced aluminum veneer body is prolonged. And when the metal sound insulation body is replaced, the metal sound insulation body is rapidly detached and then rapidly installed through cooperation of the metal sound insulation body and the bolts.

The utility model discloses a rubber part and a sound-absorbing metal sound barrier, the rubber part comprises a rubber gasket, the cross section of the rubber gasket is a U-shaped groove, and the upper parts of the two sides of the U-shaped groove are bent outwards, so that a trumpet-shaped opening structure is formed above the rubber gasket, the outer wall of the trumpet-shaped opening structure is used for installing an outer rubber pipe, and the outer wall of the trumpet-shaped opening structure is used for installing an inner rubber pipe. And the groove of the rubber gasket is used for installing the inner rubber pipe. According to the rubber part and the sound absorption metal sound barrier, multi-point high-elasticity contact supporting is adopted at the contact position of the ceramsite sound absorption plate and the metal shell, damping increase of the whole structure and good sealing of an acoustic structure are achieved by means of large deformation generated when the inner rubber pipe is pressed, the acoustic structure is secondarily sealed through the outer rubber pipe, and the sound absorption effect is good. Meanwhile, the overall stability and safety of the assembled rubber part are ensured through size amplification, and the assembling efficiency of the sound absorption metal sound barrier is improved through the flaring design.

The utility model belongs to the technical field of sound barriers, and particularly relates to a pre-embedded outside replaceable metal sound barrier structure. The metal sound barrier structure comprises a pre-embedded mounting base, a plurality of T-shaped steel stand columns are arranged on the upper portion of the mounting base, included angles between vertical plates and transverse plates of the T-shaped steel stand columns are used for positioning sound barrier unit plates, the outer sides of the vertical plates are connected with one side edge of angle steel through a plurality of bolts, and the other side edge of the angle steel is used for pressing and fixing the sound barrier unit plates. The mounting base comprises an embedded anchoring steel bar and an I-shaped steel lying strip, the anchoring steel bar is connected with a bottom plate of the I-shaped steel lying strip, a top plate of the I-shaped steel lying strip is connected with a beam plate of the H-shaped steel lying strip, and an outer side plate of the H-shaped steel lying strip is connected with a transverse plate of the T-shaped steel stand column through welding or bolts; the metal sound barrier structure is convenient to quickly disassemble, assemble and maintain, and has the characteristics that the embedded foundation is stable and firm, the sound barrier is convenient to assemble and replace, the maintenance cost is low, and the economic benefit is good.

The utility model relates to the technical field of sound insulation barriers, and discloses a sound insulation barrier for a well site, which comprises a plurality of H-shaped steel upright posts which are distributed side by side at intervals, a plurality of sound insulation plates are longitudinally distributed between two adjacent H-shaped steel upright posts, and each sound insulation plate comprises a metal shell and a sound absorption material embedded in the metal shell. The U-shaped grooves of the adjacent H-shaped steel stand columns are oppositely arranged, and the ends of the sound insulation plates are embedded into the U-shaped grooves of the H-shaped steel stand columns. Openings are formed in the lower ends of the baffles of the H-shaped steel stand columns, movable baffles are arranged at the openings, the height of the openings is larger than or equal to the width of the sound insulation plates, and the sound insulation plates are placed in the opposite U-shaped grooves of the two adjacent H-shaped steel stand columns from the openings; according to the sound insulation barrier for the well site, the problem that a sound insulation plate of an existing metal sound insulation and absorption composite sound barrier needs to be installed in a climbing mode is solved.

The invention discloses a metal sound barrier edge folding forming positioning device, and belongs to the technical field of edge folding forming. The mounting frame is fixedly connected to the upper end of the base; and the supporting frame is fixedly connected to the upper end of the base. The connecting column is driven by the air cylinder A to move downwards, the arc-shaped positioning plate A is driven to make contact with the upper end of a workpiece, meanwhile, the mounting rod moves in the cylindrical groove through compression of the spring A, then the arc-shaped racks on the two sides and the arc-shaped positioning plate B are driven to slide along the arc-shaped rod through meshing transmission of the toothed plate and the gear, and precise fixing of the side face of the workpiece is achieved. By means of the design, it is guaranteed that the edge of the arc-shaped positioning plate B and the edge of the arc-shaped supporting plate are located on the same vertical plane, an accurate positioning foundation is provided for the subsequent bending procedure, the movement stability is enhanced through cooperation of the sliding rails and the sliding grooves, deviation of workpieces in the machining process is effectively prevented, and the bending forming precision and consistency are improved.

The invention discloses a metal sound barrier unit plate suitable for medium-speed magnetic levitation. The unit plate comprises a front panel, a rear panel and a sound absorption layer filled between the front panel and the rear panel, the front panel is a metal perforated plate, the perforation rate is 15-20%, and the front panel is arranged in a honeycomb shape; the sound absorption layer is distributed in a gradient density manner, and can absorb high-frequency and low-and-medium-frequency noise; the distance between the front plate and the rear plate is 80-150 mm, the front plate and the rear plate are fixed through a metal support, and the plates are made of aluminum alloy or stainless steel with the tensile strength not lower According to the medium-speed maglev line noise abatement sound absorption material, 500-1200 Hz full-band efficient sound absorption can be achieved, the 1000 Hz sound absorption coefficient reaches 0.76-0.82, vibration resistance and moisture resistance are excellent, the medium-speed maglev line noise abatement sound absorption material is suitable for complex working conditions along a medium-speed maglev traffic line, the whole life cycle cost is low, and the medium-speed maglev line noise abatement sound absorption material can be widely applied