510results about "Noise reduction construction" patented technology

The embodiment of the invention discloses a noise reduction regulation and control method and device for a self-adaptive sound barrier and a medium, and relates to the technical field of noise reduction, and the method comprises the steps: collecting multi-source vehicle noise data which comprises current sound pressure signal time sequence data, preposed sound pressure signal time sequence data and preposed vehicle point cloud data, according to the front sound pressure signal time sequence data and the front vehicle point cloud data, determining a noise source position prediction result corresponding to a sound barrier front node so as to perform sound field prediction on the sound barrier node, and determining a corresponding sound field energy distribution thermodynamic diagram; according to a preset sensitive frequency band threshold value, a target noise high-frequency band needing to be offset is determined in the sound field energy distribution thermodynamic diagram, so that a reverse sound wave signal corresponding to a phase array offset module is generated, and the target noise high-frequency band is offset; and according to the current sound pressure signal time sequence data and the reinforcement learning strategy, determining dynamic sound absorption regulation and control parameters of the dynamic sound absorption module so as to absorb a low-frequency band.

The present invention relates to a noise barrier wall panel that is lighter and more structurally sound than existing concrete noise barrier wall panels. The panel has a metal frame that is reinforced via metal strapping in key areas to prevent sagging. The panel has a plurality of layers forming a laminate that can be fixedly attached to the frame. A finish coating layer may have a plurality of designs, logos, symbols, or textures which may mimic building materials or scenery.

The utility model relates to the technical field of sound barriers, in particular to a sound barrier with a protection mechanism, and adopts the technical scheme that the sound barrier with the protection mechanism comprises stand columns, a barrier plate, grooves, convex blocks, a protection plate and first anchoring holes; three barrier plates which are arranged from top to bottom are arranged between the two stand columns which are opposite in the left-right direction, grooves are formed in the stand columns, the left sides and the right sides of the barrier plates are fixedly connected with protruding blocks matched with the grooves, the front portions and the rear portions of the stand columns are each provided with two protection plates located at the joints of the barrier plates, and four first anchoring holes are formed in each protection plate. According to the sound barrier, an existing sound barrier is improved, the protection plates located on the front side and the rear side of the joint of the barrier plates are additionally arranged on the stand columns, the protection plates are tightly attached to the joint of the barrier plates, the joint of the barrier plates is protected, the phenomena of air leakage and sound leakage at the joint of the barrier plates can be prevented, and the noise reduction efficiency of the sound barrier is improved.

The invention provides a resonant cavity broadband sound barrier based on a double-helix acoustic black hole. The resonant cavity broadband sound barrier comprises a plurality of double-helix acoustic black hole resonant cavity broadband sound absorption structure cells and a supporting and connecting assembly. The multiple double-spiral acoustic black hole resonant cavity broadband sound absorption structure cells are connected together through the supporting and connecting assemblies, and a plate-shaped sound barrier is formed; the double-spiral acoustic black hole resonant cavity broadband sound absorption structure cell is in the shape of a hollow regular hexagon nut, the inner side face of the cell is open, and six cavities with the inner sides open are formed in the cell. Two spiral curved surface rolling plates with the same or different spiral curve parameters are arranged in each cavity; the curved surface of the spiral curved surface rolling plate is perpendicular to the upper end face and the lower end face of the double-spiral acoustic black hole resonant cavity broadband sound absorption structure cell. A plurality of protruding teeth are distributed on the inner side face and the outer side face of the spiral curved-surface rolling plate. The invention has the advantages that the broadband sound absorption characteristic is realized; certain ventilation and lighting performance is achieved, and the driving environment of an inner channel of the closed traffic sound barrier can be more comfortable.

The utility model discloses a cadmium telluride power generation glass sound barrier which comprises a base frame, the base frame is of a U-shaped structure, movable grooves are formed in the inner walls of the two sides of the base frame, a lower sound insulation plate is arranged at the lower end in the base frame, a plurality of upper sound insulation plates are installed on the inner side of the base frame above the lower sound insulation plate, and movable blocks are arranged on the outer walls of the two sides of the upper sound insulation plates. A plurality of locking bolts are installed on the outer surfaces of the two sides of the base frame, one ends of the locking bolts penetrate through the base frame and are in threaded connection with the surfaces of the movable blocks, bottom frames are arranged on the two sides of the bottom end of the base frame, two L-shaped positioning bases are arranged on the outer walls of the bottom frames, and first cadmium telluride power generation glass is installed on the outer wall of one side of the lower sound insulation plate. Second cadmium telluride power generation glass is installed on the outer wall of the side, away from the first cadmium telluride power generation glass, of the lower sound insulation plate. According to the utility model, the purpose that the sound barrier is easy to replace and maintain is achieved, the energy utilization efficiency is improved, and the stability of the sound barrier in use is improved.

The invention discloses a sound barrier auxiliary rapid installation tool and method, and relates to the technical field of sound barrier plate installation. Comprising a telescopic joint, a rotary hoisting head arranged at the top of the telescopic joint, telescopic rods arranged at the two ends of the telescopic joint and protection devices arranged at the two ends of the telescopic rods and used for clamping rubber strips at the ends of a sound barrier screen body or supporting the screen body, and the protection devices completely cover and protect the rubber strips. And the screen body cannot be blocked by the rubber strip and can be smoothly lowered, so that the rubber strip can be prevented from being damaged, and the screen body can be smoothly mounted.

The invention relates to a road sound insulation board for traffic engineering, and belongs to the technical field of road sound insulation boards, the road sound insulation board comprises a mounting base, a sound insulation board body is detachably connected to the top of the mounting base, silencing holes are formed in the surface of the sound insulation board body, and a water storage cavity is formed in the sound insulation board body. According to the green plant pot and the first spraying pipe, when sound insulation operation is conducted on a road through the road sound insulation board, in order to improve the multifunctionality of the sound insulation board in daily use and achieve the multiple noise reduction effect on road noise, a planting rod is turned over to be in a horizontal state, and the green plant pot is placed outside the planting rod; a first spraying pipe is opened to spray green plants, meanwhile, a control valve outside a connecting pipe is opened, a municipal water source is conveyed into a water storage cavity under the formation of a circulating opening, a sound insulation means is added in a sound insulation plate, and multiple noise reduction operation is performed on noise under the sound insulation condition of the sound insulation plate; and the aesthetic effect of the sound insulation plate in daily use is increased.

The invention discloses a sound barrier rapid installation structure, system and installation method, and relates to the technical field of sound barrier installation, and the sound barrier rapid installation structure comprises a pressing plate base and a buckle pressing plate. The pressing plate base is in a long strip shape and provided with a mounting groove extending in the length direction of the pressing plate base. An opening extending in the length direction is formed in one side of the mounting groove; the buckle pressing plate comprises a pressing plate and a buckle; two side edges in the width direction of the pressing plate are used for respectively pressing the outer side surfaces of two adjacent screen bodies; the lower side of the pressing plate is fixedly connected with a buckle extending in the length direction of the pressing plate. Blocking parts protruding inwards are arranged on one or two inner side walls, in the width direction, of the mounting groove, and matching parts protruding outwards are arranged on one or two outer side walls, in the width direction, of the buckle; and the buckle can be inserted into the mounting groove through the opening. The method has the advantages of being high in construction efficiency, few in installation materials, low in cost, free of material falling risks, free of maintenance in the later period, capable of reducing accident disputes and the like.

The invention discloses a sound barrier sealing system, a metal screen body, a transparent screen body and a sound barrier system, and relates to the technical field of sound barrier sealing, the sound barrier sealing system comprises a first sealing joint, a second sealing joint, a third sealing joint and a pressing plate, the first sealing joint is integrally formed by the metal wall face of the metal screen body, and the second sealing joint is integrally formed by the metal wall face of the transparent screen body; the edge of the top extends outwards to form a first baffle; the second sealing joint is provided with a clamping groove and a second baffle plate; the clamping groove is used for inserting and clamping the edge of the transparent screen body; the third sealing joint is provided with a clamping groove and a third baffle, the clamping groove is used for allowing the edge of the transparent screen body to be inserted and clamped, and the third baffle is used for being in lap joint with the lower surface of the other adjacent transparent screen body; the pressing plate is detachably arranged on the cross beam, and the edge of the pressing plate in the width direction is used for being in lap joint with the upper surface of the metal screen body and / or the transparent screen body. According to the invention, all nodes in the totally-enclosed sound barrier system are designed, the purpose of waterproofing gaps at all nodes is achieved, and the waterproof effect is good.

The utility model discloses a trough beam structure capable of separating pedestrians from vehicles, belongs to the field of bridge engineering, and solves the problems that the clearance below a bridge is difficult to meet the flood discharge requirement after the bridge is level-crossed with a dike, the noise and tail gas pollution of a motor vehicle lane is serious, and the pedestrian experience feeling is poor. A channel beam is of a channel structure formed by a bottom plate and web plates on the two sides of the bottom plate, cantilever plates are arranged on the two sides of the channel beam respectively, and bridge railings are arranged on the outer sides of the cantilever plates. The bottom plate is used for arranging a motorway, and the cantilever plate is used for arranging a sidewalk. By adopting the through channel beam structure and the cantilever slab overhanging structure, the height of the bridge building is effectively reduced, navigation and flood discharge clearance under the bridge are ensured, and roads on two banks do not need to be lifted; the webs on the two sides of the channel beam are used for conducting hard isolation on a sidewalk and a motorway, separation of people and vehicles is achieved, potential safety hazards are reduced, and noise and tail gas are isolated.

The utility model relates to the technical field of sound barriers, in particular to a photovoltaic street lamp and sound barrier integrated structure which comprises a support, a plurality of stand columns, purlines and partition plates, the stand columns are evenly arranged, the purlines are connected between the tops of every two adjacent stand columns, and the partition plates are connected between the bottoms of every two adjacent stand columns. The barrier mechanism comprises a barrier plate and a barrier support connected with the stand columns and used for fixing the barrier plate. The lamp mechanism comprises a lamp pole connected with one end of the stand column and a lamp assembly connected with the other end of the stand column. And the photovoltaic panel is fixedly connected with the purline. The photovoltaic panel, the lamp mechanism and the barrier mechanism are integrated, the photovoltaic panel is fixedly connected with the purline, the street lamp is installed on the stand column, and the barrier support and the stand column fix the barrier plate, so that the complexity that the photovoltaic street lamp and the sound barrier are installed separately is simplified, and the trouble that spaces are reserved for the street lamp and the sound barrier separately is avoided; the design and construction efficiency is effectively improved, and a more appropriate solution is provided for application in a space-limited area.

The invention provides a high-speed railway subgrade filler with noise reduction and crack resistance functions and a preparation process thereof, and particularly relates to a totally-enclosed sound barrier structure for high-speed railway noise reduction engineering, which comprises an entrance-exit hole section, a plurality of standard sections and a plurality of expansion joint sections, the access hole section and the first standard section are sequentially connected front and back, the standard sections and the expansion joint sections are arranged at intervals one by one, and one expansion joint section is arranged between every two adjacent standard sections; the totally-closed sound barrier has the advantages that the totally-closed sound barrier is divided into the access hole section, the standard section and the expansion joint section, the access hole is connected with the stand columns through the steel beams inclining inwards by 45 degrees, the ends of the arc-shaped stand columns are connected through the double-curved-surface arc-shaped steel beams, the integrity of the steel structure is improved, splicing nodes are optimized, the standard section is formed by arranging the arc-shaped steel beams at the interval of 2 m, and the expansion joint section is formed. The arc steel beams are arranged at intervals at the position of the expansion joint, the standard steel beams on the two sides of the expansion joint are designed to be of a full-cloth structure, firmness is improved, and the safe, reliable, economical and practical sound barrier design is formed.

The utility model discloses a detachable temporary sound insulation wall for highway safety facility engineering. The detachable temporary sound insulation wall comprises a fixing base, a sound insulation assembly and a locking assembly. The sound insulation assembly is used for isolating construction noise and comprises a fixing frame structure, a sound insulation plate is arranged on the inner side of the fixing frame structure, the fixing frame structure is connected to the top of the fixing base in a penetrating and inserting mode, a limiting piece used for splicing the sound insulation wall is arranged on the side of the fixing frame structure, and the locking assembly is connected to the side of the fixing base in a penetrating and inserting mode. The locking assembly is used for fixing the sound insulation plate; according to the sound insulation assembly fixing frame structure, the limiting pieces are arranged at the splicing positions of the sound insulation assembly fixing frame structure, and through position limitation of the limiting pieces, when the splicing positions between the sound insulation assemblies are extruded and collided by construction external force, the limiting pieces can enable the multiple sound insulation assemblies to be spliced into a whole; and the situation that the sound insulation assemblies are spliced, deviated and staggered due to external force collision, and overall wall sound insulation is affected is avoided.

A combined noise protection and vehicle restraint system on roadways (2) has profiled, preferably H-shaped uprights (8) with grooves (33) running in the longitudinal direction thereof and noise protection elements (11) accommodated in a form-fitting manner between adjacent uprights (8). The noise protection elements (11) have a surface (3) facing the roadway (2) and have lateral edges (15, 16), wherein the noise protection element (11) engages in the grooves (33) of the adjacent uprights (8) in the region of the lateral edges (15, 16) of the noise protection element. At least one retaining element (12) is arranged between adjacent uprights (8), which retaining element has a higher resistance force against an impact of a vehicle than the noise protection elements (11). The retaining element (12) has lateral ends (17) by means of which it engages in the grooves (33) of the adjacent uprights (8).

The invention relates to the technical field of functional materials, in particular to a sound-absorbing metal plate and a preparation method and application thereof. According to the sound-absorbing metal plate provided by the invention, the metal panel, the functional inner core and the back plate are adopted, and the core is that the sound-absorbing structure of the functional inner core is utilized, so that the noise reduction coefficient is more than 0.95. Specifically, according to the sound-absorbing metal plate provided by the invention, ethylene-vinyl acetate and polyethylene glycol terephthalate are adopted as basic resin, and the pore structure of the functional inner core is controlled by utilizing the synergistic effect of the foaming agent and the cross-linking agent, so that the pore structure is more beneficial to efficient absorption and reduction of sound reflection. According to the sound-absorbing metal plate, the functional inner core is further arranged between the metal face plate and the back plate, the sound-absorbing function and the structural stability of the functional inner core are further enhanced, and the sound-absorbing metal plate provided by the invention achieves the optimal performance. The sound-absorbing metal plate provided by the invention has the advantages of favorable flame retardancy, favorable safety, decoration and beautification functions and favorable overall effect.

The utility model discloses a stable type high-speed rail sound barrier relates to high-speed rail sound barrier technical field, including U-shaped track and a plurality of fixed box body, the U-shaped track is installed in advance on the two sides of high-speed rail, the fixed box body is arranged on the upper end of the U-shaped track, the upper end of the fixed box body is vertically provided with a sound barrier plate body, and the sound barrier plate body is provided with a plurality of sound barrier holes. A U-shaped track is arranged on the lower end of the fixed box body, a fixed frame is vertically mounted at the lower end of the fixed box body, the fixed frame is arranged in the U-shaped track, a mounting plate is mounted at the lower end of the side wall of the fixed box body, the mounting plate is arranged on the outer side of the U-shaped track, and a moving mechanism is arranged on the fixed box body and the fixed frame. The fixing frame is placed in the U-shaped track, then the fixed box body and the sound barrier plate body are moved through the first idler wheel, the third idler wheel and the second idler wheel, rapid splicing installation of the fixed box body and the sound barrier plate body can be achieved, and compared with a traditional bolt fixing mode, the splicing installation efficiency is high.

The utility model discloses a dust-proof and noise-proof isolation device for municipal construction, and relates to the technical field of municipal infrastructure engineering. Comprising a sound barrier wall which is of a vertical plate structure arranged vertically; the flow guide plates are horizontally arranged on the side surface, facing the municipal construction direction, of the sound barrier wall, the upper ends of the flow guide plates incline towards the municipal construction direction, and the flow guide plates are evenly distributed in the longitudinal direction. The upper end of the lower group of guide plates is higher than the lower end of the upper group of guide plates and lower than the upper end of the upper group of guide plates, and a gap for water flow to pass through is reserved between every two adjacent groups of guide plates; the first group of water spraying and dust falling mechanisms is arranged at the top of the sound barrier wall and sprays water mist towards the direction of the flow guide plate; and the second group of water spraying and dust falling mechanisms is arranged at the top of the sound barrier wall and sprays water mist towards the upper part of the sound barrier wall.

The utility model discloses a high-stability vertical sound barrier embedded part, which belongs to the technical field of sound barrier embedded parts, and adopts the technical scheme that the high-stability vertical sound barrier embedded part comprises a sound barrier embedded part body, an auxiliary stabilizing mechanism is arranged at the top of the sound barrier embedded part body, and the auxiliary stabilizing mechanism comprises a storage component and a calibration component; the storage assembly is arranged at the top of the sound barrier embedded part body, the calibration assembly is arranged in the storage assembly, and by arranging the storage assembly and the calibration assembly, a user can install the storage assembly at any corner of the sound barrier embedded part body according to actual conditions so as to receive and fix the calibration assembly; a user can combine the calibration assembly and the storage assembly, the calibration assemblies arranged at the tops of the two sound barrier embedded part bodies can mutually emit calibration light rays, at the moment, the user only needs to directly observe whether light ray drop points are located on the same level or not, calibration can be conducted, and the user can conveniently conduct installation work.

The utility model relates to the technical field of noise control, in particular to a cable-supported sound insulation barrier. The sound insulation screen comprises side sound insulation screens arranged on the two sides of a road and a bridge and further comprises a top sound insulation screen arranged above the road and the bridge, the top sound insulation screen comprises a bearing cable net, a main frame, side frames and sound insulation plates, the main frame comprises main stand columns and main beams, and the main stand columns are arranged in the middle of the road and the bridge at intervals in the longitudinal direction of the road and the bridge. The girders are fixedly arranged at the upper parts of the main upright posts along the longitudinal direction of the road bridge; the side frame comprises side stand columns and side beams, the side stand columns are fixedly arranged on the edges of a road bridge at intervals in the longitudinal direction of the road bridge, and the side beams are fixedly arranged on the tops of the side stand columns in the longitudinal direction of the road bridge. The bearing cable net comprises a plurality of main inhaul cables, the main inhaul cables roughly extend in the transverse direction of the road bridge, the two ends of each main inhaul cable are fixed to the corresponding main beam and the corresponding edge beam respectively, the main inhaul cables are arranged at intervals in the longitudinal direction of the road bridge, and the sound insulation plates are arranged on the bearing cable net. The method can be widely applied to noise control projects in the traffic and transportation fields such as highways, railways, subways and high-speed rails.

The transition section guardrail is used for being installed between a bridge section guardrail and a roadbed section guardrail, the transition section guardrail comprises a first stand column, a first beam and a second beam, the first stand column is installed on the ground, and the first beam and the second beam are installed on the side wall of the first stand column. One end of the first beam is used for being connected with a collision face of a bridge section guardrail, and the other end of the first beam is used for being connected with a roadbed section guardrail. According to the transition section guardrail provided by the utility model, the transition section guardrail is provided with the first beam and the second beam at intervals along the axial direction of the upright post, and the first beam is respectively connected with the bridge section guardrail and the roadbed section guardrail. Meanwhile, when the second beam is arranged, the height of at least part of the second beam is larger than that of the head-on collision face, and the second beam is also connected with the bridge section guardrail and the roadbed section guardrail. Therefore, the anti-impact requirements of the transition section guardrail and the whole guardrail can be met, and meanwhile the construction difficulty and the construction cost are effectively reduced.

The utility model provides a sound insulation and noise reduction device for a rail transit bridge, which comprises a sound insulation and noise reduction base plate, wherein an accommodating groove is formed in the inner side wall of the sound insulation and noise reduction base plate; the movable frame is rotationally connected to the interior of the containing groove through a bearing, and an X-shaped support is fixedly arranged in the middle of the movable frame; the sound absorption cotton and the sound insulation plate are arranged in the movable frame respectively, and the sound absorption cotton and the sound insulation plate are arranged on the two sides of the X-shaped support respectively; and the protection plate is arranged on the sound insulation and noise reduction base plate, and the protection plate covers the containing groove. According to the device, noise can be subjected to double weakening and noise reduction through the sound absorption cotton and the sound insulation plate, the sound insulation and noise reduction effect is improved, the containing groove is detached from the sound insulation and noise reduction base plate, the movable frame is rotated out of the containing groove around the hinge shaft, the sound absorption cotton and the sound insulation plate can be pulled out of the inserting groove to be cleaned or replaced, and operation is convenient and fast.

The utility model relates to the technical field of sound barriers, and discloses a plug-in type cultural sound barrier which comprises a base, the upper surface of the base is connected with a lower barrier, the upper surface of the lower barrier is connected with a cultural plate, the upper surface of the cultural plate is connected with an upper barrier, and the upper surface of the base is connected with a supporting assembly. The lower barrier, the culture plate and the upper barrier are all located between the supporting assemblies, the upper ends of the supporting assemblies are connected with the two anti-pressing assemblies, and the other ends of the two anti-pressing assemblies are connected with the two sides of the upper end of the culture plate correspondingly. According to the plug-in culture sound barrier, the supporting assemblies are arranged on the base, the lower barriers, the culture plates and the upper barriers are arranged between the supporting assemblies, and the supporting assemblies are wrapped inside, so that when the lower barriers, the culture plates and the upper barriers are used, the lower barriers, the culture plates and the upper barriers can be spliced; therefore, the lower barrier, the culture plate and the upper barrier are prevented from being hindered by the supporting assembly while the supporting effect is not affected.

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 relates to the technical field of noise pollution prevention and control, in particular to a sound insulation screen for preventing and controlling noise pollution, which comprises a sound insulation mechanism for preventing and controlling noise pollution, and a fixing mechanism for fixing rotating equipment is arranged above the sound insulation mechanism. By arranging the sound insulation mechanism and the fixing mechanism, when a certain sound insulation plate is damaged and needs to be disassembled, a knob is rotated, the knob drives a bidirectional threaded rod to rotate, the bidirectional threaded rod rotates to drive two movable blocks to get away from each other, the movable blocks drive movable rods to move, and the left movable rod and the right movable rod also get away from each other; the movable rods move to be separated from the limiting assemblies, then the inserting rods are detached from the limiting assemblies, limiting of the sound insulation plates is relieved through the limiting assemblies, finally, the damaged sound insulation plates are detached, all the sound insulation plates in the device can be detached independently, the detaching process is convenient and rapid, and the using effect of the device is effectively improved.

The utility model discloses an assembled expressway sound barrier with double sound absorption faces. The assembled expressway sound barrier comprises a sound barrier body used for installation, glass fixedly installed at the upper end of the sound barrier body and a sliding rod arranged on the left side of the sound barrier body. A first spring is arranged on the outer side of the right end of the sliding rod, a groove is formed in the middle of the sliding rod, a steel ball is connected into the groove, a second spring is arranged at the upper end of the steel ball, a sliding block is fixed to the left end of the sliding rod, and a clamping block is arranged at the upper end of the sliding block; the first clamping groove is formed in the right side of the sound barrier body, second clamping grooves are formed in the upper end and the lower end of the first clamping groove, and a fixing block and a connecting rod are arranged at the upper end of the sound barrier body. According to the double-sided sound absorption assembled highway sound barrier, the sound barrier can be conveniently and quickly assembled and spliced, the spliced sound barrier can be conveniently and secondarily connected, and the mounted sound barrier can be conveniently supported.

The invention provides a combined induction type shading shed for a ramp tunnel exit, and relates to the field of shading sheds, the combined induction type shading shed comprises a shading shed body, the shading shed body comprises two shading shed side walls, a supporting frame installed between the two shading shed side walls and a shading film fixed to the supporting frame, and the shading film comprises a shading film located on the outer layer and a shading film located on the inner layer; the top visual induction assembly comprises a plurality of groups of hollow guide arrows arranged on the sunshade film and can form projections on corresponding carriageways; the side visual induction assembly comprises a plurality of reflective film guide arrows arranged on the side wall of the shading shed, and the reflective film guide arrows are distributed in the length direction of the shading shed body at equal intervals; the sound guiding assembly comprises a plurality of broadcasters arranged on the side wall of the shading shed, and the multiple broadcasters are distributed in the length direction of the shading shed body at equal intervals. The method has the effect of reducing the tension of a driver on the white hole effect and the escape effect of the ramp tunnel exit.

The invention relates to an acoustic insulation panel (1) based on Helmholtz single-cavity resonators, designed to effectively attenuate low-frequency noise generated by industrial equipment. The panel (1) is formed by a front wall (2) and a rear wall (3), both U-shaped, enclosing a hollow space (4) that acts as a resonator cavity. The shorter sides (2', 3') of these walls are folded inwards, forming channels that function as inlets (5) to the resonator. Furthermore, an acoustic insulation system composed of several of these panels (1) is described, in which the panels are arranged so as to allow both ventilation and noise attenuation. The associated acoustic insulation method consists of facing the resonators to maximize noise absorption at specific frequencies, ensuring a laminar air flow that improves the efficiency of the system without the need for large volumes or additional silencers.

The invention relates to the technical field of environmental acoustics, discloses a road totally-enclosed sound barrier sound field prediction method and system, belongs to the field of environmental acoustics, and has very high practicability in sound field prediction and noise pollution evaluation of public road traffic noise after a totally-enclosed sound barrier is implemented. On the basis of the acoustic propagation principle, a new prediction method is provided for a road traffic noise source and a totally-closed sound barrier, a sound field is divided into two subsystems including a barrier internal space and an external space, and equivalent acoustic models of the two subsystems and a calculation method and recommendation parameters of the noise source sound power level are given respectively. According to the method, the sound environment of the high-rise building close to the urban road can be accurately predicted and calculated, and a basis is provided for noise pollution evaluation and control. And meanwhile, the method can be matched with a national standard method or commercial acoustic software for use, and has relatively high applicability.

The invention relates to the technical field of highway operation noise treatment, in particular to an energy-saving sound barrier structure of an expressway, which comprises a main body assembly, a bearing platform, a stand column arranged at the end part of the bearing platform and sound insulation board units arranged on the inner wall of the stand column in an array, bosses are further arranged at the ends of the sound insulation board units and matched with grooves formed in the end faces of the bearing platforms, and the outer walls of the bosses are further sleeved with sealing strips; the moving assembly comprises a main rack, the main rack is arranged in a built-in cavity formed in the inner wall of the boss, the inner wall of the built-in cavity is further provided with a bimetal induction piece, the end of the bimetal induction piece is connected with a moving part, and the moving part is connected with the main rack and drives the main rack to move on the inner wall of the built-in cavity; structural positioning of the main body assembly is achieved through cooperation of the boss and the groove. A variable cavity is arranged in the sealing strip, the breathing effect is generated through thermal expansion and cold contraction of a working medium, the ice layer adhesive force is damaged in advance to form microcracks, and the difficulty of follow-up ice breaking is lowered.

The present application relates to the field of rail transportation, in particular to a full-closed sound barrier for rail transportation, comprising a first sound barrier and a second sound barrier, a first channel and a second channel are formed on both sides between the first sound barrier and the second sound barrier, and a sound-absorbing assembly is arranged in the first channel and the second channel, the sound-absorbing assembly is provided with a first sound-absorbing module and a second sound-absorbing module, and a flow path for air circulation is formed between the first sound-absorbing module and the second sound-absorbing module, air flows through the flow path formed by the first sound-absorbing module and the second sound-absorbing module, noise energy is effectively reflected, scattered and absorbed during the propagation process, thereby effectively attenuating the sound wave intensity, greatly reducing the noise level, and gradually weakening the sound wave intensity. The present application also relates to a mounting method of the full-closed sound barrier for rail transportation.