EP3135813B1 - Sound-proofing device for a track system - Google Patents

Description

The present invention relates to a soundproofing device for a track system, which soundproofing device comprises a soundproofing area and a fastening area for fastening to the track system.

From the EP 2 210 978 A2 (or DE 10 2009 005 439 A1 ) a soundproofing device to be attached to a track system is known, which comprises a wall-shaped soundproofing element. The soundproofing element provides a soundproofing area which extends in the area of the track system next to the rails upwards and in the direction towards the rails. The soundproofing element is fastened to a rail via a plurality of carriers which provide a fastening region and are fixed in the lower region thereof and extend to the rails. These carriers have locking pins which engage in corresponding locking openings in the soundproofing element. To fix them to a rail, claws to be positioned over the rail base of a rail and locking screws that lock these are provided on these supports.

From the KR 2010 0137232 A A soundproofing device is known in which a plurality of supports which surround a rail foot of a rail and are fastened to the rail foot and are made of metal material and carry a plurality of sound insulation areas made of rubber material on both sides of a rail. These lip-like soundproofing areas extend towards the rail and lie against side surfaces of a rail head or a rail web connecting the rail head to the rail foot. When a train runs over it, the lip-like soundproofing areas positioned at the top in the vertical direction are deformed by a pulling wheel that rolls on the rail head.

From the EP 1 355 006 A1 is a soundproofing device for a track system according to the preamble of claim 1 is known, in which soundproofing elements are curved on both sides of a rail in the direction of the rail and have upward-running soundproofing areas and connecting them to a rail foot of the rail, and from the soundproofing elements or the Soundproofing areas of the same separately formed beams are defined on a track system. The soundproofing areas are constructed with a core made of rubber material, which is embedded at least on its side facing away from the rail in a rigid shell made of metal material or plastic material.

The EP 1 905 901 A2 discloses a soundproofing device in which a soundproofing wall made of thermoplastic material, such as PE or PP, is arranged laterally next to the rails of a track system.

It is the object of the present invention to provide a soundproofing device for a track system, which is simple to install on a track system with a simple construction.

According to the invention, this object is achieved by a soundproofing device for a track system, comprising a soundproofing area and a fastening area for fastening to a track system. It is further provided that the soundproofing area and the fastening area are formed on a soundproofing element made of rubber material and that the fastening area is designed for fastening the soundproofing element to a rail support arrangement carrying rails of a track system. In order to achieve a stable fixing of a soundproofing device according to the invention on a track system, the fastening area comprises a fastening fitting area that is adapted to the shape of a side end contour of a rail support arrangement and a plurality of fastening organ through openings.

The soundproofing device according to the invention is designed with a soundproofing element which takes over both the functionality for soundproofing, namely with its soundproofing area, and the functionality for fixing to a track system, namely with its fastening area. The attachment of additional supports on the soundproofing element on the one hand and on a rail on the other hand can be completely dispensed with.

In a particularly advantageous embodiment, the fastening area is designed for fastening the soundproofing element to sleepers, which are largely used in rail systems as rail support arrangements.

In particular, it can be provided that the fastening fitting area comprises a first fastening fitting area section to be positioned on an upper side of a rail support arrangement with a fastening fitting area underside and a second fastening fitting area section with a fastening fitting area end face to be positioned on a lateral face of a rail support arrangement, wherein fastening organ passage openings are preferably provided in the first fastening fitting area section.

According to a special aspect of a soundproofing device, it can be designed such that the soundproofing area is one of the Rails facing a track system to be positioned soundproofing side and a rear side to be positioned facing away from the rails of the track system, wherein the soundproofing area is preferably inclined in a height direction away from the fastening area towards the rear. On the sound insulation side, the sound insulation area can be designed to obtain an optional sound insulation. An arrangement in which the soundproofing area is inclined in a height direction starting from the fastening area in the direction of the rear is particularly advantageous. This means that the soundproofing device or its soundproofing area generally extends from the area where it is attached to a track system so that the soundproofing device is relatively close to the primary sound source, namely the tread run over by the wheels of rail vehicles of the respective rail head, but on the other hand an interference with the standard light space which is to be kept clear is avoided.

A sound insulation formation can be provided on the sound insulation side, which in a particularly advantageous embodiment variant comprises a plurality of sound insulation projections arranged one above the other in the vertical direction, each with an upper sound reflection surface and / or a lower sound reflection surface.

Particularly when a track system with sleepers is designed as a track support arrangement and these sleepers are generally embedded in a ballast bed, particularly efficient sound insulation can be achieved with a soundproofing device according to the invention, for example, in that the soundproofing projections with their lower sound reflecting surfaces with respect to one of a rail running surface Rail outgoing sound propagation direction are oriented such that there is a sound reflection downwards on these lower sound reflection surfaces. Due to the primary reflection of sound downwards, i.e. towards the one that carries the rails Underground, e.g. B. in the direction of a ballast bed, on the one hand the sound radiation upwards and into the environment is avoided. On the other hand, the primary sound reflection in the direction of a ballast bed or the like ensures efficient sound insulation by means of multiple reflection or absorption on the very irregular surface of a ballast bed.

This primary sound reflection in the downward direction, i.e. in the direction of the subsurface, can be ensured, for example, by the fact that the lower sound reflection surfaces from sound insulation projections provided in a lower region of the sound insulation region to sound insulation projections provided in an upper region of the sound insulation region have an increasing angle of attack with respect to a height direction exhibit. This means that the surface normals of the lower sound reflection surfaces in the direction from lower sound reflection surfaces positioned further down to sound reflection surfaces positioned further upward are increasingly inclined downwards, and accordingly a reflection downwards from lower sound reflection surfaces well above the primary sound source is ensured.

Furthermore, the construction of the soundproofing device according to the invention can be such that between the lower sound reflection surface and the upper sound reflection surface of at least two sound insulation projections arranged directly one above the other, a sound insulation recess that tapers from the sound insulation side towards the rear and ends in a recess apex region is formed. With the provision of such soundproofing recesses, there is the possibility in an alternative principle of soundproofing to design it in such a way that with at least one, preferably each soundproofing recess, the lower sound reflection surface and upper sound reflection surface delimiting this with respect to one originating from a rail running surface of a rail Sound propagation direction are oriented in such a way that sound reflection occurs in the direction of the recessed apex region on these sound reflection surfaces. Here, too, multiple reflection takes place for sound insulation on the sound reflection surfaces running towards one another and delimiting a sound insulation recess.

In order to be able to use the soundproofing device according to the invention over a large area for sound insulation, it is proposed that the soundproofing projections are essentially elongated in a longitudinal direction of soundproofing elements or / and that a plurality of groups of soundproofing projections arranged one above the other in a longitudinal direction of soundproofing are provided or / and that soundproofing projections arranged one above the other are provided Are essentially offset to one another transversely to the height direction and in the direction from the soundproofing side to the rear, are arranged overlapping one another in regions.

In order to be able to achieve a further improved sound insulation behavior by sound scattering, it is proposed that the sound insulation formation has at least on the sound insulation side a plurality of preferably pyramid-like sound insulation increases or / and sound insulation reductions.

In the case of a construction which is particularly advantageous on the one hand due to the very good durability even under difficult natural influences, and on the other hand due to the high stability, it is proposed that the soundproofing element at least in one volume area providing the surface on the soundproofing side and / or the rear side with at least one layer during manufacture the soundproofing element is for the first time cross-linked, preferably fiber-reinforced new rubber material. The core region of the soundproofing device carrying at least one such layer of new rubber material can be bound with rubber granulate material, for example obtained from the Recycling of waste rubber.

According to a further particularly advantageous aspect, at least one relief opening which can be closed or locked by a closing flap can be provided on the sound insulation area. Through such a relief opening, snow that is thrown sideways by a rail vehicle can pass, for example, when a track system is passed over, so that an excessive load on the soundproofing device by snow impinging on it can be avoided and also an excessive accumulation of snow on the side of the soundproofing device facing a track system can be avoided can be.

A structurally simple to implement, yet stable configuration can be achieved if the end flap forms an integral part of the soundproofing element, the end flap preferably adjoining the soundproofing element in a deformation hinge area. In particular, it can be provided that the end flap adjoins the soundproofing element in an upper region thereof.

In order to avoid impairment of the sound insulation behavior by such an end flap, it is proposed that at least part of the sound insulation formation be provided on the end flap.

Furthermore, the soundproofing behavior can be further improved in that a soundproofing lip inclined in the direction of a soundproofing side of the soundproofing element is provided on an upper side of the soundproofing element.

The present invention further relates to a track system comprising a rail support arrangement constructed, for example, with sleepers supported rails and in a longitudinal direction of the track system next to the rails a soundproofing arrangement with at least one soundproofing device according to the invention. A plurality of such soundproofing devices are preferably provided in succession in the longitudinal direction of the track system.

Fig. 1

einen in Perspektive dargestellten Ausschnitt einer Gleisanlage mit einer daran vorgesehenen Schallschutzvorrichtung;

Fig. 2

eine Querschnittansicht der Gleisanlage der Fig. 1 mit der daran vorgesehenen Schallschutzvorrichtung;

Fig. 3

in perspektivischer Darstellung eine Schallschutzvorrichtung einer alternativen Ausgestaltungsart;

Fig. 4

die Schallschutzvorrichtung der Fig. 3 in Frontansicht;

Fig. 5

die Schallschutzvorrichtung der Fig. 3 in Draufsicht;

Fig. 6

eine Schnittdarstellung einer Schallschutzvorrichtung einer alternativen Ausgestaltungsart;

Fig. 7

eine Frontansicht des Details VII in Fig. 6;

Fig. 8

eine Rückansicht des Details VII in Fig. 6;

Fig. 9

eine vergrößerte Ansicht des Details VII in Fig. 6;

Fig. 10

eine vergrößerte Ansicht des Details X in Fig. 6.

The present invention is described in detail below with reference to the accompanying figures. It shows:

Fig. 1

a section of a track system shown in perspective with a soundproofing device provided thereon;

Fig. 2

a cross-sectional view of the track system of Fig. 1 with the provided soundproofing device;

Fig. 3

a perspective view of a soundproofing device of an alternative embodiment;

Fig. 4

the soundproofing device of the Fig. 3 in front view;

Fig. 5

the soundproofing device of the Fig. 3 in top view;

Fig. 6

a sectional view of a soundproofing device of an alternative embodiment;

Fig. 7

a front view of detail VII in Fig. 6 ;

Fig. 8

a rear view of detail VII in Fig. 6 ;

Fig. 9

an enlarged view of detail VII in Fig. 6 ;

Fig. 10

an enlarged view of the detail X in Fig. 6 ,

The Fig. 1 and 2 show a soundproofing device, generally designated 10, on a track system 12. The track system 12 comprises, as a rail support arrangement 14, a plurality of sleepers 16 arranged in succession in a longitudinal direction of the track system. Rails 18 of the track system 12 are carried on the sleepers 16.

A soundproofing element 11, which essentially provides the soundproofing device 10, is designed such that it can be fixed to the lateral end regions 20 of the sleepers 16, that is to say in principle to a lateral end region of the rail support arrangement 14. For this purpose, the soundproofing element 11 has a fastening region 22 positioned at the bottom in a height direction represented by a line H, that is to say, for example, in a direction orthogonal to the plane spanned by the rail support arrangement 14. Starting from the fastening area 22, there extends a sound insulation area, generally designated 24 and described in detail below.

The fastening area 22 is constructed in such a way that it is adapted to the shape of the side end contour of the rail support arrangement 14, here the sleepers 16. For this purpose, the fastening region 22, adapted to the angular outer circumferential contour of the sleepers 16, forms a corresponding angular contour with a first fastening fitting region section 28 and a second fastening fitting region section 30 arranged at an angle thereto in a fastening fitting region generally denoted by 26. The first fastening fitting region section 28 has one on a top side 32 of the sleepers 16 fastening fitting area underside 34 to be positioned lying on. The second fastening fitting region section 30 has a fastening fitting region end 38 to be positioned against a lateral end face 36 of the sleepers 16.

To fix the soundproofing device 10 on the rail support arrangement 14, that is to say the sleepers 16, are in the first Fastening fitting portion 28 provided fastening organ through openings 40. These are positioned such that fastening elements, for example screw bolts, can be introduced through them into corresponding fastening element receiving openings in the rail support arrangement 14 or the sleepers 16. In order to have flexibility in assembly, the fastening organ through openings 40 can be designed in the manner of an elongated hole. The fastening organ receiving openings to be provided in the rails 16 can be provided, for example, by dowel elements or the like that are already fitted into them during the production of concrete rails. In order to ensure a stable mounting of the soundproofing device 10, it is also dimensioned such that it extends in the longitudinal direction of the track system over a plurality of sleepers and can therefore also be firmly connected to a plurality of sleepers.

The soundproofing area 24 of the soundproofing device 10 or the soundproofing element 11 has a soundproofing side 42 to be positioned facing the rails 18 and a rear side 44 to be positioned facing away from the rails 18. The soundproofing area 24 is designed such that, starting from the fastening area 22, it extends in the direction away from the rails 18, that is to say inclined from the soundproofing side 42 to the rear side 44. On the one hand, this enables the fastening area 22 to be fastened to the sleepers 16, that is to say comparatively close to the rails 18, but on the other hand it ensures that the soundproofing device 10 does not intervene in the regular light space which is to be kept basically free.

The soundproofing element 11 is formed on the soundproofing side 42 with a soundproofing formation generally designated 46. This soundproofing formation comprises a plurality of ones arranged one above the other and extending, for example, in a longitudinal direction of the track system or also in a longitudinal direction of a soundproofing device Soundproofing projections 48. The soundproofing projections 48 are arranged one above the other, the soundproofing projections 48 being arranged one above the other being offset due to the inclination of the sound insulation region 24 in the direction away from the rails 18, but lying overlapping one another.

The soundproofing projections 48 have a generally triangular or sawtooth-like cross-sectional contour and have an upper sound reflecting surface 50 and a lower sound reflecting surface 52. The lower sound reflection surface 52 and the upper sound reflection surface 50 of two immediately adjacent sound insulation projections 48 delimit a sound insulation recess 56 ending in a recess apex region 54.

The sound insulation projections 48 are basically designed in such a way that their lower sound reflection surfaces 52 are oriented such that sound emitted by a rail running surface 58 of an immediately adjacent rail 18 is reflected in a downward direction, that is to say in the direction of the rail support arrangement 14 or the sleepers 16. When the wheels of rail vehicles are passed over the rails 18, the contact area between a respective rail running surface 58 and the outer peripheral surface of a wheel forms an essential sound source. By in Fig. 2 Recognizable orientation of the lower sound reflection surfaces 52 ensures that sound S emanating from this sound source is not reflected upwards into the environment, but downwards, where this sound is then efficiently attenuated, for example in the ballast bed, by multiple reflections or by absorption.

In order to ensure such a downward reflection in the case of lower sound reflection surfaces 52 positioned in the upper regions of the soundproofing element 11, the lower sound reflection surfaces 52 are arranged such that their inclination with respect to the height direction H from lower ones positioned further down Sound reflection surfaces 52 increases to lower sound reflection surfaces 52 positioned further up. It can be clearly seen that the angle of attack α ₁ formed between an extension line L _{1 of} the bottom sound reflection surface 52 ′ positioned at the bottom and the height direction H is smaller than the angle of attack α ₂ between the height direction H and the extension line L _{2 of} a lower position positioned further up Sound reflection surface 52 ". It goes without saying that not all of the lower sound reflection surfaces 52 need to have different angles of attack from one another. Of course, groups of lower sound reflection surfaces 42 can also be provided here, which are of the same height direction H.

One recognizes in Fig. 1 that several fields 59 lying next to one another in the longitudinal direction of the track system or also in the longitudinal direction of the soundproofing element with soundproofing projections 48 arranged one above the other are provided on the soundproofing element 11, each of which is separated or delimited by a separating web 60. This leads to an increased stability of the soundproofing element 11. This can be made of rubber material on the one hand for reasons of cost and on the other hand for reasons of stability. It is advantageous here to construct the volume regions of the soundproofing element 11 that provide an outer surface with new rubber material that has been crosslinked for the first time in the production thereof, that is, for example, vulcanized new rubber material, which can preferably be fiber-reinforced. So-called tire cord or similar material can be used here, for example, in which textile fibers, PE fibers, polyester fibers, glass fibers or carbon fibers are embedded in the new rubber material, which have a length in the range of 15 mm to 30 mm, for example. This near-surface volume area of the soundproofing element 11 can have a thickness in the range from 0.5 cm to approximately 2 cm. The core area of the soundproofing element 11 can be constructed with bound rubber granulate, which can preferably be obtained by recycling used rubber, for example used tires, and can be bound by adhesive and / or vulcanization. at In the manufacture of a soundproofing element, a layer of not yet crosslinked, preferably fiber-reinforced new rubber material can first be inserted into a molded element. The construction material of the core area, ie the granulate material, is sprinkled thereon, which in turn is covered by a layer of new rubber material, preferably fiber-reinforced. Another molded part is applied from above. The two molded parts are pressed against one another under pressure and temperature in order to trigger the crosslinking process in the new rubber material or to bind the granulate material to one another. A soundproofing element 11 produced in this way is comparatively stiff, in particular due to the stabilizing effect of the fiber-reinforced new rubber material, and does not lose its stability even under prolonged exposure to the weather. Also, due to the construction material described above, the soundproofing element 11 is so stable in its fastening area 22 that a stable mounting on the rail support arrangement 14 can be ensured using the fastening members, which are designed, for example, as screw bolts.

An alternative embodiment of the soundproofing device 10 is shown in FIGS 3 to 5 shown. The structure of this type of configuration essentially corresponds to that described above. However, it can be seen that the soundproofing projections 48 are arranged at a smaller mutual distance, which means that the upper soundproofing surfaces 50 and lower soundproofing surfaces 52, which each delimit a soundproofing recess 56, form an acute angle between them. This results in such a reflection behavior of the sound emitted from a rail running surface 58 that multiple reflection occurs at the sound reflection surfaces 50, 52 that delimit a respective sound insulation recess 56 and the sound that is reflected multiple times is reflected towards the recess apex 54 and is thereby increasingly absorbed. This also makes it more efficient Soundproofing mechanism provided. It can be seen in the 3 to 5 also that two mounting eyelets 64 can be provided on an upwardly oriented upper side 62 of the sound insulation element 11 in order to be able to lift the soundproofing device 10 from a truck, for example, and to position it on the rail support arrangement 14. This enables the construction of the soundproofing device 10 or the respective soundproofing elements 11 with a comparatively large length of 1.5 m and more, so that the soundproofing element 11 can extend over several thresholds and can be connected to them. After attachment to the rail support assembly 14, the mounting eyelets 64 can be removed so that they do not protrude into the standard light room.

Another modified embodiment of the soundproofing device 10 or the soundproofing element 11 is shown in FIGS 6 to 10 shown. The basic structure of the soundproofing element 11 corresponds, in particular also with regard to the design of the soundproofing formation 46 provided on the soundproofing side 42, to the structure described above, so that reference can be made to the relevant statements. In addition, it should be noted that, as in Figure 7 recognizable, preferably on the sound insulation side 42, a plurality of, preferably pyramid-shaped, sound insulation increases and / or sound insulation depressions 66 arranged in groups or rows can be provided. These sound insulation increases or / and sound insulation depressions 66 provided, for example, on the respective lower sound reflection surfaces 52 lead to an increased scattering of the sound occurring on the sound insulation side 42. Such increases in sound insulation or sound reduction 66 can of course also in the in the 1 to 5 Shown embodiments of the soundproofing element 11 may be provided.

In the in the 6 to 10 Soundproofing element 11 shown is provided, for example, in at least one, preferably each of the fields 59, a closing flap 68. This forms an integral part of the soundproofing element 11 and is therefore produced with it as one body. In its upper region, the end flap 68 adjoins the remaining part of the soundproofing element 11 in the region of a deformation hinge region 70. The deformation hinge region 70 is provided, for example, in the region of a groove-like depression 72 opposite a recess apex 54 on the rear 44. On both sides and in its lower region, the end flap 68 is separated from the remaining part of the soundproofing element 11 by a generally U-shaped recess 74.

In the in the Fig. 6 . 7 . 8th and 9 Positioning of the end flap 68 shown is finally positioned a relief opening 76 which is also essentially delimited by the U-shaped recess 74. The closure flap 68 can be pivoted in the deformation hinge region 70 with respect to the remaining part of the soundproofing element 11, in particular it can be swung in the direction of the rear side 44 of the soundproofing element 11. The end flap 68 opens the relief opening 76 at least in some areas.

If snow accumulates in the area of the track system 12, this can be thrown aside by a train passing over the track system 12. The snow thrown to the side strikes the soundproofing side 42 of the soundproofing device 10. As a result of the impact, the end flap 68 can pivot away towards the rear 44 in the manner described above, so that at least some of the snow thrown sideways can fall through the relief opening 76 and collect on the rear 44. Larger accumulations of snow in the area of the sound insulation side 42 can thus be avoided. Excessive mechanical stress on the soundproofing element 11 is also avoided, since the snow striking it does not have to be completely stopped by the soundproofing element 11, that is to say it has to be braked, but instead is deflected in its trajectory and forwarded to the rear 44. Only part of the kinematic energy of the snow thrown to the side must therefore be absorbed by the soundproofing element 11.

In order to avoid impairment of the sound insulation behavior even in the presence of one or more such end flaps 68 on a soundproofing element 11, as the figures show, the sound insulation formation 46 is also provided or continued in the region of the end flap / s 68 on the sound insulation side 42.

A further improvement in the sound insulation behavior can be achieved by a sound insulation lip 70 seen in the area of the upper side 62 of the sound insulation element 11. The soundproofing lip 78 extends from the upper side 62 on the soundproofing side 42 or in the direction of the soundproofing side 42 and diagonally upwards away from the rear side 44. By means of this sound insulation lip 78, the reflection behavior provided in particular by the lower sound reflection surfaces 52 is also continued in the upper region or going beyond the upper side 62.

In the construction of a soundproofing device described above, efficient sound insulation is achieved, in particular in a region close to the rail, with simple and inexpensive manufacture. This is ensured on the one hand by the positioning of the sound insulation device, which is moved close to a rail, which is then inclined upwards away from the adjacent rail. Due to the sound insulation formation with the different sound reflection surfaces, a reflection of sound upwards is essentially prevented. It should be noted that this regarding the Soundproofing behavior of a particularly advantageous embodiment of a soundproofing element can be used particularly efficiently if, as is shown, for example, in Fig. 2 it can be seen that the soundproofing device or the soundproofing element is attached directly to a rail support arrangement, for example the sleepers of a track system. Nevertheless, the aspects which are advantageous with regard to the sound insulation behavior can also be used if such a soundproofing element is fixed by means of a plurality of supports, for example directly on the rails or the sleepers of a track system.

Claims (15)

1. Sound insulation device (10) for a track system (12), comprising a sound insulation region (24) and a fastening region (22) for fastening to the track system (12),
   characterized in that the sound insulation region (24) and the fastening region (22) are formed on a sound insulation element (11) made of rubber material, and in that the fastening region (22) comprises a fastening fitting region (26), which is matched in shape to a side end contour of a rail support arrangement (14) supporting rails (18) of a track system (12), and a plurality of fastening member passage openings (40) for fastening the sound insulation element (11) to the rail support arrangement (14).
2. Sound insulation device according to claim 1,
   characterized in that the fastening region (22) is formed for fastening the sound insulation element (11) to sleepers (16),
   or/and
   in that the fastening fitting region (26) comprises a first fastening fitting region section (28) to be positioned on an upper side (36) of a rail support arrangement (14) with a fastening fitting region lower side (34), and a second fastening fitting region section (30) to be positioned on a lateral end side (36) of a rail support arrangement (14) with a fastening fitting region end side (38), fastening member passage openings (40) preferably being provided in the first fastening fitting region section (28).
3. Sound insulation device according to claim 1 or 2,
   characterized in that the sound insulation region (24) comprises a sound insulation side (42) to be positioned facing the rails (18) of a track system (12) and a rear side (44) to be positioned facing away from the rails (18) of the track system (12), wherein preferably the sound insulation region (24) is inclined in a height direction (H) away from the fastening region (22) in the direction of the rear side (44).
4. Sound insulation device according to claim 3,
   characterized in that a sound insulation formation (46) is provided on the sound insulation side (42) of the sound insulation region (24).
5. Sound insulation device according to claim 4,
   characterized in that the sound insulation formation (46) comprises a plurality of sound insulation projections (48) arranged one above the other in the height direction (H), each with an upper sound reflection surface (50) and/or a lower sound reflection surface (52).
6. Sound insulation device according to claim 5,
   characterized in that the sound insulation projections (48) are oriented with their lower sound reflection surfaces (52) with respect to a sound propagation direction emanating from a rail running surface (58) of a rail (18) in such a way that a sound reflection in the downward direction takes place at these lower sound reflection surfaces (52), preferably wherein the lower sound reflection surfaces (52) of sound insulation projections (48) provided in a lower region of the sound insulation region (24) have an angle of attack (α) increasing with respect to a height direction (H) towards sound insulation projections (48) provided in an upper region of the sound insulation region (24).
7. Sound insulation device according to claim 5 or 6,
   characterized in that a sound insulation recess (56) tapering from the sound insulation side (42) towards the rear side (44) and ending in a recess apex region (54) is formed between the lower sound reflection surface (52) and the upper sound reflection surface (50) of at least two sound insulation projections (48) arranged directly above one another, preferably wherein in at least one, preferably each sound insulation recess (56), the lower sound reflection surface (52) and upper sound reflection surface (50) delimiting said recess are oriented with respect to a sound propagation direction emanating from a rail running surface (58) of a rail (18) in such a way that a sound reflection in the direction of the recess apex region (54) takes place at said sound reflection surfaces (50, 52).
8. Sound insulation device according to one of claims 5 to 7,
   characterized in that that the sound insulation projections (48) are substantially elongated in a longitudinal direction of the sound insulation element and/or that a plurality of groups (58) of sound insulation projections (48) arranged one above the other following each other in a longitudinal direction of the sound insulation element are provided and/or that sound insulation projections (48) arranged one above the other are arranged substantially transversely to the height direction (H) and offset relative to each other in the direction from the sound insulation side (42) to the rear side (44), partially overlapping each other.
9. Sound insulation devices according to one of claims 3 to 8,
   characterized in that the sound insulation formation (46) has a plurality of preferably pyramid-like sound insulation elevations and/or sound insulation depressions (66) at least on the sound insulation side (42).
10. Sound insulation device according to one of claims 1 to 9,
    characterized in that the sound insulation element (11) is formed at least in a volume region providing the surface on the sound insulation side (42) and/or the rear side (44) with at least one layer of sound insulation material cross-linked for the first time during the manufacture of the sound insulation element, preferably fiber-reinforced new rubber material, preferably wherein the sound insulation element (11) is formed in a core region carrying the at least one layer of new rubber material with bound rubber granulate material, preferably recycled granulate material.
11. Sound insulation device according to one of claims 1 to 10,
    characterized in that at least one relief opening (76) closed or closable by a closure flap (68) is provided on the sound insulation region (24).
12. Sound insulation device according to claim 11,
    characterized in that the end flap (68) forms an integral part of the sound insulation element (11), preferably the end flap (68) adjoining the sound insulation element (11) in a deformation hinge region (70), preferably the end flap (68) adjoining the sound insulation element (11) in an upper region thereof.
13. Sound insulation device according to claim 4 and claim 11 or 12,
    characterized in that at least part of the sound insulation formation (46) is provided on the end flap (68).
14. Sound insulation device according to one of claims 1 to 13,
    characterized in that a sound insulation lip (78) inclined in the direction of a sound insulation side (42) of the sound insulation element (11) is provided on an upper side (62) of the sound insulation element (11).
15. Track system (12),
    comprising rails (18) supported on a rail support arrangement (14), preferably sleepers (16), and comprising a sound insulation arrangement with at least one sound insulation device (10) according to one of the preceding claims in a track system longitudinal direction laterally adjacent to the rails (18).

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