JP2019520501A - Noise absorbing panel for use in a sound absorbing guardrail system - Google Patents

Abstract

The present invention relates to a noise-absorbing panel for use in a sound-absorbing guardrail system, the structure of the noise-absorbing panel being preferably a vertically oriented series of struts and a structure of a guardrail facing the road And a series of longitudinal guardley beams mounted on the side of the housing, wherein the noise absorbing panel is mountable on two adjacently located pillars. The sound absorbing panel may comprise a plate of noise absorbing material enclosed within the energy absorbing material provided with the openings.

Description

  The present invention relates to a noise absorbing panel for use in a sound absorbing guardrail.

  Guardrails are provided on the sides of the road for the purpose of limiting personal injury by capturing and decelerating the vehicle and absorbing the energy of the vehicle off the road. In addition to this main function, it is also found to be attractive to provide a guardrail with noise reduction means.

  Hence, such a type of acoustic guardrail is known from EP 1 528 158 A1. Here, the acoustical panel is made of aluminum or made transparent.

  Another example of a guardrail with noise reduction means is known from WO 2010/018028 A1, in which a perforated plate is provided behind the guardrail beam.

  In order to ensure road safety and reduce the risk of personal injury, it is required that the guardrail must be able to absorb the impact of a collision without collapsing. This requirement is also applicable to noise reduction measures. The requirement is to avoid projectiles or sharp debris which in the case of a collision can result in severe personal injury. In a guardrail with the noise reduction means mentioned above, the encapsulation in a transparent material such as aluminum or glass or plastic is brittle and expensive and can not withstand vehicle impact without disassembly.

  By providing a noise reduction panel as described above, the risk of disassembling the panel during an impact is very high, so the object of the invention is to reduce the noise that can withstand the impact of a vehicle collision with a guardrail. It is to provide a guardrail with reduction means.

European Patent Application Publication EP 1 528 158 A1 International Publication 2010/018028 A1

  According to the invention, this object is of the kind initially mentioned, wherein the noise absorbing panel comprises a plate of noise absorbing material enclosed in an energy absorbing material provided with an opening. Is achieved by the guardrails of Such energy absorbing material provided with the openings can be formed by a mesh, grid or perforated material.

  By the present invention, a noise absorbing panel is contained within an energy absorbing material, such as, for example, the mesh, whereby an improved noise absorbing panel in a guardrail system is achieved, which is also It has been found to be advantageous to satisfy the requirements for shock absorption and to avoid disassembly on impact with the vehicle.

  The noise absorbing material is preferably a mineral wool fiber board with very good noise absorbing properties. However, the noise-absorbing panels can also be foam materials, integrated or partial rubber materials, other materials such as integrated or partial plastic materials, or weather conditions and wear effects, adjacent to the road. It is understood that it can be made using other noise absorbing materials that are durable.

  In a preferred embodiment of the invention, the energy absorbing material is an extensible metal mesh enclosing a plate of the noise absorbing material. Extension metals or extension metals provide very good energy absorption properties so that nets made of extension metals can be deformed to a considerable extent when impacted. Depending on the design of the extension metal mesh, it is possible to provide different extension behavior in different stress directions, eg higher stress resistance in impact situations, whereby it is higher in the longitudinal direction of the road than in the vertical direction It is possible to provide energy absorption. The mesh of the extensible mesh can provide more deformation in such a direction that the extensible mesh provides higher stress resistance. The mesh of the stretch metal mesh deforms less in such a direction that the stretch metal mesh has less stress resistance. This can be achieved, for example, by means of a diagonally formed mesh with longer diagonal lines in the vertical direction and shorter diagonal lines in the horizontal direction. Thereby, the ability to deform horizontally in a rectangular mesh is higher than the ability to deform vertically. Damage to the panel in any state, especially in collision situations, can be avoided.

  Moreover, in addition to the mechanical behavior of the mesh made of the extension metal, particularly under stress conditions, such materials may also provide additional beneficial optical and / or mechanical effects. The extender metal may provide a surface structure with different groups of surfaces intentionally oriented in a particular direction. Thereby, the impact light from the vehicle is scattered in a more unfavorable direction, while the impact light is reflected in a preferred direction so that it is reflected by the surface of a group of mesh materials in a preferred direction. It is possible to achieve. Moreover, while an object impacting from another direction suffers higher friction, tilting the group of surfaces in a preferred direction also causes certain objects colliding with the net material to be along the material surface, It can help to slide in a preferred direction with less friction.

  As an alternative to the extensible metal mesh, the energy absorbing material can be formed from perforated metal sheet, multi-slit metal sheet, plastic mesh, fiber reinforced plastic, rubber material or the like.

  Besides mineral wool fiberboard, more preferably stone wool material has very good noise absorption properties, another advantage with certain stone wool as material is that this material is fire resistant . For example, an energy absorbing material such as an extensible metal mesh can provide protection for mineral wool and further contribute to energy absorption in impacts resulting from a collision with the guardrail, eg, energy such as an extensible metal mesh The absorbent material also ensures that the acoustic panel does not collapse on such impacts. For example, this synergy between the sound-absorbing material formed by mineral wool fiberboard and an energy-absorbing material, such as, for example, an extension metal, is advantageous and also the requirements for shock absorption in the event of a collision with a vehicle. To provide a guardrail with an improved noise absorbing panel that satisfies and avoids collapse.

  The term "extended metal mesh" means an expanded metal sheet made by the process of slitting and stretching. These processes may involve precision dies that slit and extend the sheet material in a single operation. Extended metals are manufactured through the cutting and extension of solid sheets of metal on special machines. The machine cuts and stretches the metal and expands it to a seamless mesh without joints. Production does not contain weld joints and yarns, which contributes to the unique quality of the expanded metal. The mesh produced after expansion of the cut metal provides the material with an excellent carrying capacity.

  The material is then processed through a set of rollers, which adjust the final thickness. The extension metal in the net is a ductile metal capable of absorbing energy while plastically deforming.

  Preferably, the extension metal is galvanized steel. This is advantageous as it is weather resistant, inexpensive to produce, and very ductile and deformable by deforming the mesh structure of the extensible metal mesh when impacted. By plating the extension metal, the sharp edge is rounded. However, it is understood that other types of protective coatings, such as plastic coatings, paints, or the like may also be used according to the present invention.

  As a substitute for, or as a complement to, an extension metal, the energy absorbing mesh is a perforated metal sheet, plastic mesh, or the like, and / or a combination thereof that encapsulates a plate of the noise absorbing material possible

  In one embodiment, the mesh is a panel that encloses at least the major side and top of the mineral wool fiberboard. Preferably, the inclusions are made from an extensible metal mesh panel which is bent in a box-like shape around a mineral wool fiber board, with mounting panels provided on each of the end sides.

  According to the invention, an extension metal mesh panel can be produced at each of the end sections with a non-extension area for receiving the mounting panel at each end in order to mount the sound absorbers on the columns, Be understood. This avoids any sharp edges or points in the mesh structure, thereby reducing any risk of personal injury to persons when handling noise absorbing panels or in the event of a collision with a guardrail It can be done. Moreover, this feature of the present invention prevents the risk of injuring pedestrians or people riding bicycles, as the noise absorbing panels can also be attached to urban areas, for example, in balustrades and the like.

  The noise absorbing panel is preferably about 90 cm high and about 260 cm long. This means that the panels can be fitted between the columns in a conventional guardrail structural design. Alternatively, the panel may be positioned aft of the post as seen from a road where two successive pairs of posts may be arranged at a distance of about 1 m, 1.3 m, 2 m or 4 m, respectively. However, noise absorbing panels of any size are incorporated by the present invention. In particular, it is preferable to provide a noise absorbing panel within predetermined standardized dimensions that is matched to the usual prefabricated guardrail set for different applications. According to the invention, the panel may also alternatively be mounted in front of the post, eg, between the post and the guardrail. According to one embodiment of the invention, the panels are not directly interconnected or mechanically fixed to one another. Instead, they are mounted on pillars or guardrails and arranged adjacent to one another without mutual fixation. In other cases, the panels can be mechanically connected.

In a preferred embodiment, the sound absorbing material board, in particular mineral wool fiber board, has a density in the range of 60-150 kg / m ³ , preferably 80-120 kg / m ³ , more preferably 80-100 kg / m ^3. It may be provided. This provides a noise absorbing panel in a size that is easy to handle during installation.

  In one embodiment, the board is preferably provided with a protective cloth on the side facing the road. This protects the mineral fiber board from salt, mud and the like from the road. The fabric may be weather resistant and UV resistant, for example a fleece such as a non-woven, to ensure long life of the absorbent panel.

  In addition to this feature, it is possible to provide a protective fabric with a structured surface having a different appearance in perspective. Thereby, it is possible to provide an optical effect according to the actual line of sight. For example, the fleece and thereby the noise absorbing panel may reflect incident light more intensely or more gently depending on the actual angle of incidence. It is also possible to provide a protective fabric with a specific light absorption effect, such that the protective fabric has a different color depending on the actual incident light or line of sight. Thereby, the fleece reflects light when illuminated from one direction of travel of the road and completely or partially absorbs or deflects light when illuminated from the other direction of travel of the road obtain. In addition to design features, this feature may also provide functional advantages when the sound absorbing panel is mounted adjacent to a road.

  It has been found to be advantageous for the present invention to provide a noise absorbing panel in either a planar or curved configuration. Another advantage of the stretch metal mesh encapsulating mineral fiber board is also that the stretch metal mesh is manually deformable so that the noise panel can be bent into a preferred curved shape. As an alternative, when using stiffer and less flexible panels, shorter panels may be used and arranged in a polygonal path to attach to a curved road.

  In an embodiment of the present invention, the guardrail is preferably made of a beam made of a steel profile of predetermined cross-sectional shape. Beams may be provided with sound reduction means, such as one or more perforated sections.

  As an alternative to profile beams, guardrails can be tubes or wires.

  According to a further embodiment of the invention, a noise absorbing panel can be provided at a separate axial end with an end contour. Such end contours may have an I-shape, an H-shape, a U-shape, or a C-shape. The use of an end profile with an I-shape, H-shape enables the connection of two consecutive noise-absorbing panels which can be brought into separate recesses provided by this shape of the profile. The U-shaped or C-shaped profile can be used as an end profile of an individual noise absorbing panel if no further noise absorbing panel is to be connected.

  According to a further embodiment of the invention, the end of the noise absorbing panel can be at least partially covered by a covering element. These covering elements can be made from materials such as, for example, rubber materials, which are elastically deformable and have good noise absorption properties. One such element can be secured to the energy absorbing mesh on each side of the noise absorbing panel. As an alternative, it is possible to provide a covering element which covers the end of the noise-absorbing panel by partially or completely surrounding or including this end. The covering element can be fixed by additional fixing means or can be clamped to a noise-absorbing panel. Retaining material that increases friction or provides a form fit is formed on the noise absorbing panel noise absorbing panel, in particular the covering element to engage with the edge of the energy absorbing mesh material Can. The covering element preferably brings about a rounded elastically deformable structure in contact with the corresponding elastically deformable structure at the opposing covering element of the adjacent noise-absorbing panel. It can be provided at the center of the end face. The elastically deformable structure may be formed, for example, by rounded projections integrally formed in the coating, with rounded protruding surfaces. This makes it possible to compensate for tolerances when mounting or assembling the system, as well as providing additional noise absorbing properties at the interface between two adjacent noise absorbing panels.

  In the following, the invention will be described in more detail with reference to the attached drawings.

FIG. 1 is a schematic perspective view of a sound absorbing guardrail system according to a first embodiment of the present invention. FIG. 2 is a schematic front view of the guardrail system according to a first embodiment of the present invention. FIG. 3 is a side view thereof. FIG. 4 is a top view thereof. FIG. 5 is a schematic perspective view of a sound absorbing guardrail system according to a second embodiment of the present invention. FIG. 6 is a schematic front view thereof. 7a) -c) are a series of cross-sectional views illustrating shock absorption by the guardrail system according to the present invention. 8-10 are cross-sectional views of three embodiments of a noise absorbing panel according to the present invention. 8-10 are cross-sectional views of three embodiments of a noise absorbing panel according to the present invention. 8-10 are cross-sectional views of three embodiments of a noise absorbing panel according to the present invention. 11-14 are cross-sectional views of the elements of each of the three embodiments. 11-14 are cross-sectional views of the elements of each of the three embodiments. 11-14 are cross-sectional views of the elements of each of the three embodiments. 11-14 are cross-sectional views of the elements of each of the three embodiments. FIG. 15 is a detailed front view of a preferred embodiment of a stretch metal mesh according to a preferred embodiment of the present invention. 16 is a side view of the extensible metal mesh of FIG. FIG. 17 is a schematic perspective view of an assembly profile for use between two adjacent noise absorbing panels. FIG. 18 is a front view of a guardrail beam according to an embodiment of the present invention with a perforated area. FIG. 19 is a detailed perspective view of the beam of FIG. 18; FIG. 20 is a cross sectional view thereof. 21 and 22 are views of a second embodiment of a guardrail beam. 21 and 22 are views of a second embodiment of a guardrail beam. Figures 23 and 24 are views of a third embodiment of a guardrail beam. Figures 23 and 24 are views of a third embodiment of a guardrail beam. 25 and 26 are two cross sectional shapes of the guardrail beam. 25 and 26 are two cross sectional shapes of the guardrail beam. 27-30 are schematic illustrations of different drilling patterns for drilling the guardrail beam of the present invention. 27-30 are schematic illustrations of different drilling patterns for drilling the guardrail beam of the present invention. 27-30 are schematic illustrations of different drilling patterns for drilling the guardrail beam of the present invention. 27-30 are schematic illustrations of different drilling patterns for drilling the guardrail beam of the present invention. 31-39 show different embodiments of the design for the end element covering the end surface of the noise absorbing panel. 31-39 show different embodiments of the design for the end element covering the end surface of the noise absorbing panel. 31-39 show different embodiments of the design for the end element covering the end surface of the noise absorbing panel. 31-39 show different embodiments of the design for the end element covering the end surface of the noise absorbing panel. 31-39 show different embodiments of the design for the end element covering the end surface of the noise absorbing panel. 31-39 show different embodiments of the design for the end element covering the end surface of the noise absorbing panel. 31-39 show different embodiments of the design for the end element covering the end surface of the noise absorbing panel. 31-39 show different embodiments of the design for the end element covering the end surface of the noise absorbing panel. 31-39 show different embodiments of the design for the end element covering the end surface of the noise absorbing panel.

  Referring to FIGS. 1-4, a first embodiment of a sound absorbing guardrail system according to the present invention is shown. The guardrail system comprises a series of vertically oriented struts 4 mounted on the side of the road 2 or on the side of the median strip. A series of noise-absorbing panels 6 are mounted on one side of the column 4 facing away from the road, and a series of longitudinal guardrails 8 are mounted on the other side of the column 4 facing the road 2 Be done. Between the noise absorbing panels 6, an assembly profile 14 (see FIGS. 1 and 2) is provided to ensure that the noise absorbing panels 6 are properly positioned and aligned.

  The noise absorbing panel 6 comprises a plate 10 of noise absorbing material enclosed within an energy absorbing mesh 12 (see FIG. 3).

  In FIGS. 5 and 6, a second embodiment of a sound absorbing guardrail system according to the invention is shown. According to this embodiment, the guardrail 8 is provided with perforated sections 81, 82 to further increase the sound absorption properties of the guardrail system.

  In FIGS. 7 a) to c) the shock absorption by the guardrail system according to the invention is shown. As the vehicle travels from the road 2 and collides with the guardrail 8, the pillars 4 are refracted at the ground surface and the noise absorbing panel 6 is moved back, for example, away from the road 2, as shown by the arrows in the figure. And energy in the impact is deformed to be absorbed by this deformation of the noise absorbing panel 6. As energy is removed from the impact, the guardrail 8 disengages from the pillar 4 as shown in FIG. 7c).

  Three embodiments of the noise absorbing panel 6 are shown in FIGS. 8-10. It is common across these three embodiments that a plate 10 of noise absorbing material is enclosed within the energy absorbing mesh 12. The material of the board 10 of noise absorbing material is preferably mineral fiber wool, which is of a particular stone wool material. This material has good sound absorption properties as well as fire resistance, and the noise absorbing panel 6 made of stone wool thereby causes a fire in connection with a road accident, The guardrail system may contribute to being able to prevent any fire from emanating, regardless of whether a vehicle impact is occurring or not on the guardrail.

  A protective contour 16, 16 ', 16' 'is provided between the plate 10 of noise absorbing material and the energy absorbing mesh 12. In FIG. 11, the plate 10 of noise absorbing material is shown alone. 12-14, three different designs of protective profiles 16, 16 ', 16' 'are shown. The protective profile 16, 16 'or 16 "may be made of a transparent or opaque polymeric material such as polypropylene, polycarbonate or the like.

  As mentioned above, the plate 10 of noise absorbing material is enclosed within the energy absorbing mesh 12. This mesh 12 is provided as a mesh and is preferably made of what is also called an extension metal or an expansion metal. Such webs of expanded metal are manufactured through the cutting and expansion of solid sheets of metal on special machines. The machine cuts and stretches the metal and expands it to a seamless mesh without joints. The mesh is thereby constituted by a rib 12 'as shown in FIGS. 15 and 16 and an opening 12' 'shaped in the shape of a rhombus.

  The expanded metal mesh 12 allows this type of mesh to be highly deformable without breakage, and therefore can absorb large amounts of energy in the event of an impact, and at the same time the vehicle of the guardrail system It is advantageous because in the event of an impact, the noise-absorbing material 10 enclosed within the mesh 12 can be prevented from collapsing and being dissipated to the environment. The expanded metal mesh is formed to be deformable along the longitudinal direction of the road rather than the vertical direction. The expanded metal mesh 12 is preferably bent into a shape to form a coating on the front and back and at least the top of the noise absorbing plate 10. Preferably, the mesh 12 is also formed to cover at least a portion of the bottom surface of the noise absorbing plate 10.

  As described in connection with FIGS. 1 and 2, an assembly profile 14 is provided between the noise absorbing panels 6. In FIG. 17, an embodiment of the assembly profile 14 is shown. The profile 14 is made as an H profile with two outer flanges 142 and a web flange 144 therebetween. Thereby, two receiving slots 146 are formed on each side of the web flange 144 to receive the ends of two adjacent noise absorbing panels 6. Alternatively, two U profiles or Z profiles can also be used.

  In the following FIGS. 18-30, various embodiments of the guardrail beam 8 are illustrated. The guardrail beam 8 is formed from a metal sheet which is bent into the desired cross-sectional shape. In the embodiment shown in FIGS. 18-20, the guardrail beam 8 is shaped with upper and lower longitudinal flanges facing the road and a central flange therebetween. The upper and lower flanges are provided with a perforated section 81 and the central flange is also provided with a perforated section 82. Mounting holes 80 are provided at least at the end of the beam 8.

  In FIGS. 21 and 22 another embodiment of a beam design is shown. This second design differs from the design shown in FIGS. 18-20 by having a non-perforated section 83 along the beam 8.

  In Figures 23-24, yet another variation of the design of perforations, in which only the area 84 around the mounting hole 80 is non-porous, is shown.

  25 and 26 show cross sections of two alternative shapes of guardrail beam 8 to the shape shown in FIG. 20 which can be used for road facing guardrail beam 8 in a guardrail system according to the invention.

  Perforations may be provided to the guardrail beam 8 with different patterns. In Figures 27-30, several different perforation patterns are shown.

  FIG. 31 is a detailed view of the edge area of the noise absorbing panel 6 as described above. In the end area of the noise absorbing panel 6 two rubber elements 200 are fixed to the edge of the energy absorbing mesh 12. The rubber elements 200 in cross-section each provide an outer shape with a U-shaped receptacle 202 with rib-like protrusions 204 and 206. Moreover, the rubber elements 200 each have a hollow oval ring portion 208. The rubber element 200 is fixed to the free edge of the mesh material 12 by means of the receiving part 202, and the bar-like projections 204 and 206 engage with the mesh material 12 and the rubber element 200 to the free edge of the mesh material 12 Retain on top. A hollow elliptical ring portion 208 that can be elastically deformed projects from the front face 210 of the noise absorbing panel 6. The rubber element 200 thereby provides a noise attenuating and mechanically shock absorbing interface to the adjacent wall element or another noise absorbing panel 6 formed with the corresponding rubber element 200. . Moreover, thereby, tolerances can be compensated.

  It should be added that the noise absorbing panel 6 also shows an additional protective layer 212 formed between the plate 10 of noise absorbing material and the energy absorbing mesh material 12. This additional protective layer 212 may be provided to protect the board 10 of noise absorbing material from mud, water or other external influences. Moreover, it may provide optical effects such as, for example, specific reflection effects or light absorption effects, depending on a certain angular range. This additional protective layer can be provided to each of the embodiments as described above, independently of the other structural features described.

  FIG. 32 shows an alternative embodiment to the design of the end covering design of the noise absorbing panel 6. The noise absorbing panel 6 is provided at its free end with a coating 220 formed of a rubber material. The coating has a bent edge area 222 which encompasses the free end of the noise absorbing panel 6 and is held by elastic deformation and friction to the end area of the energy absorbing mesh 12.

  FIG. 33 shows an embodiment for another covering 230 according to the invention, which basically corresponds to the embodiment as described for FIG. FIG. 35 additionally shows how two opposing noise absorbing panels 6 and 6 ', respectively, are arranged relative to one another with the covering 230. Moreover, FIG. 36 additionally shows a perspective view of the covering 230. According to this embodiment, the covering 230 basically has the same shape as that shown in FIG. 32 for the covering 220 and is also formed of an elastically deformable material, such as, for example, rubber. In addition, the covering 230 provides in its central area a rounded projection 232 with a hollow interior 234, which makes the rounded projection 232 elastically deformable. The general shape of the covering 230 is adapted to the geometry of the end face of the noise absorbing panel 6, as can be seen in FIG. As shown in FIG. 35, when fixed on the ends of the two opposing noise absorbing panels 6 and 6 ', the two corresponding rounded protrusions 232 of the individual coverings 230 and 230'. And 232 'contact each other to provide tight engagement of the two end coverings 230 and 230' under elastic deformation. This makes it possible to compensate for tolerances and also provides a tight connection and an additional noise attenuation effect at the interface between the two adjacent noise absorbing panels 6 and 6 '.

  FIG. 34 shows another embodiment based on the embodiment according to FIG. The end covering 240 corresponds in shape to the end covering 230 as described above, ie it also has rounded projections 242 with a hollow interior 244. Provided inside the projection 242 is a partition 246 which extends from the inner surface of the projection 242 into the plate 10 of noise absorbing material. The septum 246 additionally stabilizes the structure of the projection 242.

  FIG. 37 also shows a further embodiment based on the embodiment according to FIG. In this embodiment, a protrusion is formed by the closed ring-like structure 252 within the central area of the covering 250, as can be understood in the cross-section with the hollow interior 254. The coating 250 is in part engaged with the front face of the plate 10 of noise-absorbing material, in the present example approximately one quarter of the circumference of the closed ring-like structure 252. And it is inserted onto the end of the noise absorbing panel 6 so as to project into it to a certain extent. This further makes it possible to stabilize the coating 250 and to compensate for tolerances. As can be seen in FIG. 39, the shape of the covering 250 is similar to the shape already described for FIG.

  Finally, as can be seen in FIG. 38, this embodiment provides a similar interface between two opposing or adjacent noise absorbing panels 6 and 6 ′, and the two ring-like structures 252 are They come into contact with one another under the required elastic deformation and provide a tight fit with useful noise damping as well as shock absorbing properties.

  In the above, the invention has been described with reference to several presently preferred embodiments. However, it is understood that other embodiments may be provided without departing from the scope of the present invention, as defined in the appended claims.

Claims (17)

A noise absorbing panel for a guardrail system for attachment to a side of a roadway or to a median, said guardrail system preferably being a series of vertically oriented struts;
At least one noise absorbing panel, which can be mounted on the column, and a series of longitudinal guard rails mounted on the side of the guard rail system facing the road,
The noise absorbing panel is characterized in that it comprises a noise absorbing material encapsulated in an energy absorbing material provided with an opening.
Noise absorbing panel.   Said noise absorbing material is preferably adjacent to the road, durable to weather conditions and wear effects, preferably board, foam, integrated or partial rubber material, integrated or partial plasticity A noise absorbing panel according to claim 1, which is a mineral wool fiber material, provided as a material or other noise absorbing material.   A noise absorbing panel according to claim 1 or 2, wherein the energy absorbing material provided with the openings comprises a mesh, a grid or a perforated material.   A noise absorbing panel according to any one of the preceding claims, wherein the energy absorbing material is an extensible metal mesh enclosing a plate of the noise absorbing material.   The noise absorbing panel according to claim 4, wherein the extension metal is a ductile metal capable of absorbing energy while being plastically deformed.   The noise absorbing panel according to claim 4, wherein the extension metal is galvanized steel.   Any one of the preceding claims, wherein said energy absorbing material is a perforated metal sheet, plastic net or equivalent, and / or a combination thereof encapsulating a plate of said noise absorbing material Sound absorbing panel as described in.   A noise absorbing panel according to any one of the preceding claims, wherein the mesh is a panel enclosing at least the major sides and the top surface of the plate of the noise absorbing material.   Said enclosure is made from an extensible metal mesh panel bent in a box-like shape around a plate of said noise absorbing material, with a mounting panel provided on each of said end sides. Noise absorbing panel according to any one of the claims.   Said inclusions are made from an extensible metal mesh panel cast to insulation made by a wet felt process, with mounting panels provided on each of the end sides of said extensible metal mesh panel Noise absorbing panel according to any one of the claims.   Said extensible metal mesh panel is produced in each of said end sections, with a non-extending area for receiving said mounting panel at each end, for mounting said sound absorbing material on said columns Noise absorbing panel according to any one of the claims.   The noise absorbing panel according to any one of the preceding claims, wherein the noise absorbing panel is about 90 cm high and about 130 cm, about 260 cm, or about 520 cm, or about 530 cm in length. panel. The mineral wool fiber board is stone wool and provided with a density in the range of 60-150 kg / m ³ , preferably 80-120 kg / m ³ , more preferably 80-100 kg / m ³ Noise-absorbing panel according to any of the preceding claims.   Noise absorbing panel according to any one of the preceding claims, wherein the board is preferably provided with a protective cloth on the side facing the road.   The noise absorbing panel according to claim 14, wherein the protective cloth has a structured surface having a different appearance depending on the actual line of sight.   Noise absorbing panel according to any one of the preceding claims, wherein the noise absorbing panel is provided in a planar configuration or in a curved or polygonal configuration.   Said noise absorbing panel is provided on a separate axial end with an end contour, said end contour may have an I-shape, H-shape, U-shape or C-shape Noise absorbing panel according to any one of the preceding.

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