Classifications

• • E—FIXED CONSTRUCTIONS
  • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
  • E01F—ADDITIONAL WORK, SUCH AS EQUIPPING ROADS OR THE CONSTRUCTION OF PLATFORMS, HELICOPTER LANDING STAGES, SIGNS, SNOW FENCES, OR THE LIKE
  • E01F8/00—Arrangements for absorbing or reflecting air-transmitted noise from road or railway traffic
  • E01F8/0005—Arrangements for absorbing or reflecting air-transmitted noise from road or railway traffic used in a wall type arrangement
• • E—FIXED CONSTRUCTIONS
  • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
  • E01F—ADDITIONAL WORK, SUCH AS EQUIPPING ROADS OR THE CONSTRUCTION OF PLATFORMS, HELICOPTER LANDING STAGES, SIGNS, SNOW FENCES, OR THE LIKE
  • E01F8/00—Arrangements for absorbing or reflecting air-transmitted noise from road or railway traffic
• • E—FIXED CONSTRUCTIONS
  • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
  • E01F—ADDITIONAL WORK, SUCH AS EQUIPPING ROADS OR THE CONSTRUCTION OF PLATFORMS, HELICOPTER LANDING STAGES, SIGNS, SNOW FENCES, OR THE LIKE
  • E01F8/00—Arrangements for absorbing or reflecting air-transmitted noise from road or railway traffic
  • E01F8/0005—Arrangements for absorbing or reflecting air-transmitted noise from road or railway traffic used in a wall type arrangement
  • E01F8/0017—Plate-like elements
• • E—FIXED CONSTRUCTIONS
  • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
  • E01F—ADDITIONAL WORK, SUCH AS EQUIPPING ROADS OR THE CONSTRUCTION OF PLATFORMS, HELICOPTER LANDING STAGES, SIGNS, SNOW FENCES, OR THE LIKE
  • E01F8/00—Arrangements for absorbing or reflecting air-transmitted noise from road or railway traffic
  • E01F8/0005—Arrangements for absorbing or reflecting air-transmitted noise from road or railway traffic used in a wall type arrangement
  • E01F8/0023—Details, e.g. foundations
• • E—FIXED CONSTRUCTIONS
  • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
  • E01F—ADDITIONAL WORK, SUCH AS EQUIPPING ROADS OR THE CONSTRUCTION OF PLATFORMS, HELICOPTER LANDING STAGES, SIGNS, SNOW FENCES, OR THE LIKE
  • E01F8/00—Arrangements for absorbing or reflecting air-transmitted noise from road or railway traffic
  • E01F8/0094—Arrangements for absorbing or reflecting air-transmitted noise from road or railway traffic constructions for generation of phase shifting
• • E—FIXED CONSTRUCTIONS
  • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
  • E01F—ADDITIONAL WORK, SUCH AS EQUIPPING ROADS OR THE CONSTRUCTION OF PLATFORMS, HELICOPTER LANDING STAGES, SIGNS, SNOW FENCES, OR THE LIKE
  • E01F8/00—Arrangements for absorbing or reflecting air-transmitted noise from road or railway traffic
  • E01F8/02—Arrangements for absorbing or reflecting air-transmitted noise from road or railway traffic specially adapted for sustaining vegetation or for accommodating plants ; Embankment-type or crib-type noise barriers; Retaining walls specially adapted to absorb or reflect noise
• • G—PHYSICS
  • G10—MUSICAL INSTRUMENTS; ACOUSTICS
  • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
  • G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
  • G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
  • G10K11/172—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using resonance effects

Definitions

• the invention relates to a device for diffracting sound originating from vehicles traveling along a path, such as a motorway or railroad, which device comprises:
• Such a device is for example known from EP 2491180 and is arranged along the side of a motorway or railroad.
• the resonators in the body of the device resonate to a particular frequency out of the sound originating from vehicles traveling along a motorway or railroad and push the sound wave traveling over the device in an upward direction. As a result a reduction of the sound impacting the area at ground level next to the motorway or railroad is reduced.
• noise barrier Another option to reduce sound of a motorway or railroad is to provide a noise barrier next to the motorway or railroad.
• Noise barriers could be as high as 4 to 6 meters in order to achieve the required noise reduction. However, such high noise barriers also obstruct the view.
• the noise barrier reduces typically the noise with relative high frequencies, while the resonators reduce the noise with relative low frequencies.
• the resonators need to have a longer channel, in order to resonate with the lower frequencies.
• a disadvantage is that due to the increased length of the channels, the size of the body of the device increases. This is undesired.
• An object of the invention is to reduce the above mentioned disadvantages.
• a device which is characterized in that at least one of the number of resonators has a sectional channel with at least a first channel section and a second channel section extending in a different direction than the first channel.
• the required length for the channel of a resonator can still be obtained.
• the second channel section By directing the second channel section in another direction, the height can be reduced.
• the first channel section can depend vertically from the main surface, while the second channel section can for example extend in a horizontal direction.
• the first channel section extends perpendicular away from the main surface, while the second channel section extends back towards the main surface.
• the first channel section and second channel section form a U-shape.
• the height of the body is reduced to half of the required length of the channel.
• the distance to the next resonator will be doubled with this embodiment, the increase in width is typically no problem, as it will extend in horizontal direction and does not impede the view.
• the closed second end of the sectional channel is part of the main surface. This ensures a minimal height of the body of the device.
• the walls of the channel of each resonator are acoustically substantially non-absorbing and which are free of acoustically absorbing material and absorbent material is not located in the cavity.
• each channel is elongate and extends parallel to the first main direction.
• the pattern of resonators in a direction along the path should be the same, such that the noise generated by the vehicle is diffracted at the same way, independent of the position along the path.
• a bottom plate with a number of elongate strips and a U-shaped profile arranged thereon allows for a cost effective way of providing a device according to the invention.
• the distance between the strips and U-shaped profile as well as the width of the strips can easily be changed and manufactured specifically for the case where the device is used.
• the main surface is formed by the free top edges of the number of elongate strips extending upwardly from the bottom plate and by the base of the U-shape of the at least one profile.
• the resonators have resonance frequencies lying in a range corresponding to sound produced by the vehicles traveling along the path.
• the invention also relates to a combination of a noise barrier and a device according to the invention the device is arranged on top the noise barrier.
• Still a further embodiment of the combination according to the invention comprises a path, such as a motorway or railroad, along which vehicles travel, wherein the noise barrier is arranged parallel to the path and wherein the device extends from the top of the noise barrier away from the path.
• Figure 1 shows a perspective view of an embodiment 1 of the combination according to the invention.
• the combination 1 has a noise barrier 2 positioned parallel to a path, in particular a motorway 3.
• a device 4 according to the invention is arranged at the top of the noise barrier 2. This device 4 extends from the top of the noise barrier 2 away from the path 3.
• the device 4 is arranged parallel to the main direction D and the longitudinal direction of the motorway 3.
• the noise barrier 2 will block part of the sound generated by the traffic on the motorway, while the device 4 according to the invention will diffract the sound, which travels over the top of the noise barrier 2.
• Figure 2 shows a perspective view of the device 4.
• the device 4 has a bottom plate 5 (see also figure 3 ) with a number of parallel strips 6 and U-shaped profiles 7.
• the height of the strips 6 and U-shaped profiles 7 decreases from h 1 at the front of the device 4 towards h 2 at the back of the device 4.
• a number of resonators 8, 9 are provided in the body of the device 4 (see figure 4 ).
• the resonators 8 are formed by two adjacent strips 6 and the bottom plate 5, such that a channel is formed having a length l 1 .
• the formed channel has an open first end 11 debouching in the main surface 10 of the device 4 and has a closed second end 12 formed by the bottom plate 5.
• the resonator 9 is formed by a strip 6, a U-shaped profile 7 and the bottom plate 5.
• the U-shaped profile 7 has a first leg 13, a base 14 and a second leg 15.
• the first leg 13 is longer than the second leg 15, such that the first leg 13 is arranged to the bottom plate 5, while the free end of the second leg 15 leaves an opening with the bottom plate 5.
• a sectional channel is formed having a combined length of S 1 and S 2 .
• the sectional channel has an open first end 16 debouching in the main surface 10 and a closed second end formed by the base 14 of the U-shaped profile 7, which base 14 is also part of the main surface 10.
• the width and length of the channels of the resonators 8, 9, which are arranged one behind the other in a direction perpendicular to the first main direction D are tuned to the specific frequency at which the resonator 8, 9 needs to resonate in order to diffract part of the noise traveling over the device 4.

Landscapes

• Engineering & Computer Science (AREA)
• Architecture (AREA)
• Civil Engineering (AREA)
• Structural Engineering (AREA)
• Physics & Mathematics (AREA)
• Acoustics & Sound (AREA)
• Multimedia (AREA)
• Life Sciences & Earth Sciences (AREA)
• Sustainable Development (AREA)
• Devices Affording Protection Of Roads Or Walls For Sound Insulation (AREA)

Priority Applications (1)

Applications Claiming Priority (1)

Publications (1)

Family

ID=92209084

Family Applications (1)

Country Status (1)

Citations (8)

• 2024
  • 2024-08-01 EP EP24192290.5A patent/EP4686784A1/de active Pending

Patent Citations (8)

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