EP0618987A1 - Soundproofing member and use thereof. - Google Patents
Soundproofing member and use thereof.Info
- Publication number
- EP0618987A1 EP0618987A1 EP93924098A EP93924098A EP0618987A1 EP 0618987 A1 EP0618987 A1 EP 0618987A1 EP 93924098 A EP93924098 A EP 93924098A EP 93924098 A EP93924098 A EP 93924098A EP 0618987 A1 EP0618987 A1 EP 0618987A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- panel
- visor
- noise
- element according
- plane
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
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- 238000000576 coating method Methods 0.000 claims description 39
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- 230000000052 comparative effect Effects 0.000 description 6
- 230000001681 protective effect Effects 0.000 description 6
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- 238000010521 absorption reaction Methods 0.000 description 2
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- 230000001902 propagating effect Effects 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- NSMXQKNUPPXBRG-SECBINFHSA-N (R)-lisofylline Chemical compound O=C1N(CCCC[C@H](O)C)C(=O)N(C)C2=C1N(C)C=N2 NSMXQKNUPPXBRG-SECBINFHSA-N 0.000 description 1
- 239000004793 Polystyrene Substances 0.000 description 1
- 229920002522 Wood fibre Polymers 0.000 description 1
- 230000002238 attenuated effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
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- 239000002360 explosive Substances 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 230000030279 gene silencing Effects 0.000 description 1
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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
-
- 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
- E01F8/0029—Arrangements for absorbing or reflecting air-transmitted noise from road or railway traffic used in a wall type arrangement with porous surfaces, e.g. concrete with porous fillers
-
- 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
Definitions
- the present invention relates to a noise protection element and to its use.
- the noise caused in urban areas by the movement of motor vehicles or railways constitutes one of the irreducible nuisances due to the constant increase in traffic, although increasingly strict standards are established, in order to reduce the noise level inherent in each type of vehicle.
- the present invention aims to remedy the aforementioned drawbacks by the use of a noise protection element which, although having a slight modification of structure, allows a significant increase in attenuation, or loss, to be obtained. by insertion, noise generated in the vicinity of a traffic lane.
- a noise protection element which, although having a slight modification of structure, allows a significant increase in attenuation, or loss, to be obtained. by insertion, noise generated in the vicinity of a traffic lane.
- Another object of the present invention is the implementation of a modular-type protective assembly element, which makes it possible to envisage great flexibility of use, depending on the topography or the configuration of the places of implantation.
- the noise protection element that is the subject of the present invention, intended by assembly to form a noise protection wall, is remarkable in that it comprises a substantially flat panel, of determined height, and a visor formed by a substantially flat strip, this visor being mounted at one end of the panel and the plane containing the visor being inclined relative to the plane containing the panel at an angle ⁇ between 7 ° and 55 °.
- the noise protection element which is the subject of the present invention finds application in the soundproofing of motorways, roads or motorways, or railways or, where appropriate, runways or sections of runways at airports.
- FIG. 1a represents a perspective view of a noise protection element in accordance with the object of the present invention
- FIG. 1b represents a sectional view of the element of FIG. 1a according to the section plane AA of this figure
- FIG. 1b the figure represents a right view of FIG. 1b
- - Figure 2a shows at its various points I, II and III an installation of comparative tests respectively for a noise barrier of the traditional type, a noise barrier with visor according to the object of the present invention, and a conventional inclined noise barrier used as an intermediate reference
- - Figure 2b shows in the form of an attenuation diagram in dB, or insertion losses / frequency, for the different situations represented in Figure 2a for the RI receiver placed at the edge of the geometric shadow
- - Figure 2c represents in the form attenuation diagram in dB, or insertion losses / frequency, for the different situations represented in FIG. 2a for the receiver R2 placed in the geometric shadow,
- FIG. 2d represents in the form of an attenuation diagram in dBA or insertion losses after weighted average over the entire frequency band of the noise spectrum in different cases corresponding to a pink noise, a traffic noise and rail for the different situations represented in FIG. 2a, for the receiver Ri at the shadow limit,
- FIG. 2e represents in the form of an attenuation diagram in dBA, or insertion losses after weighted average over the whole of the frequency band of the noise spectrum in different cases corresponding to pink noise, channel noise of automobile and rail traffic, for the different situations represented in FIG. 2a,
- FIG. 3 shows an alternative embodiment of part of a noise protection element according to the invention
- FIG. 4a shows a first mode of use of one or more elements of protection against noise according to the invention
- ⁇ - Figure 4b shows a second mode of use of one or more noise protection elements according to the invention, in the case of a traffic lane formed of two traffic lanes in opposite directions .
- a more detailed description of the noise protection element which is the subject of the present invention will now be given in conjunction with FIG. 1 a and the following figures.
- the noise protection element object of the present invention is intended, by assembly, to form a noise protection wall.
- a panel 1 substantially planar and of determined height, this height being denoted H in FIG.
- It also includes a visor 2 formed by a substantially planar strip, this visor being mounted at one end of the panel 1.
- the plane containing the visor 2 is inclined relative to the plane containing the panel 1 at an angle ⁇ for example between 7 ° and 55 °.
- the strip forming the visor 2 has a transverse dimension such that this dimension projected in the plane of the panel 1, and referenced h in the above-mentioned figure, is between 10/100 and 30/100 of the height of the aforementioned panel 1.
- the strip forming the visor 2 may have a transverse dimension, which is of course perpendicular to the corresponding dimension of the edge of the panel 1 different according to the applications considered, as well as 'It will be described later in the description.
- the visor 2 can be attached to one of the edges of the panel, the visor 2 can then be assembled using all means suitable for the edge of the panel so as to ensure sufficient rigidity and mechanical cohesion of the assembly.
- the panel 1 can advantageously be subdivided into elementary panels, which are denoted 1 : 1 2 and 1 3 , for example, the various elementary panels which can be assembled by means of a tenon and mortise type assembly, for example, so as to thus constitute a single panel 1 provided with its visor, as shown in FIG.
- the elementary panel 1_ may advantageously be constituted by the elementary panel itself substantially planar, provided with a visor 2 while the elementary panels 1 2 and 1 3 are planar panels substantially rectangular intended to be superimposed so as to form part of the panel 1, which is completed by the elementary panel 1_ provided with its visor 2.
- the visor 2 and the panel 1, or respectively the visor 2 and the elementary panel 1_ are in one piece and formed from the same material.
- the material used to produce either the elementary panels 1 2 , 1 3 , or the overall panel 1, or the elementary panel l x , provided with its visor 2 can be made of reinforced cement or not, all of the elements thus produced, constituting a noise protection element, in accordance with the object of the present invention, can be prefabricated and conformed to standardized dimensions.
- FIGS. 1b and 1a on the one hand with respect to FIG. 1b, there is shown a sectional view in the section plane AA of FIG. 1, and, on the other hand, in FIG. according to the arrow shown in Figure lb of the latter figure.
- the latter may be provided with a coating made of a material absorbing the sound energy generated by the movement of vehicles traveling on a track of corresponding circulation.
- the elementary panels or the panel and the visor 2 can also be made of cement, the layer or internal face of the protective element, the internal face being defined as the face according to which the concavity of the panel 1 and of the visor 2 is turned, being provided with a layer of absorbent material.
- an absorbent material can be provided, such as a composite material of the Concrete-Wood type marketed under the trademark "Concrete-Wood-System" by the applicant.
- this material is a composite material of concrete and wood fibers, which has given complete satisfaction with regard to the characteristics of noise absorption or, more generally, of sound energy.
- the coating can also be constituted by way of nonlimiting example by a sandwich comprising for example a layer of material of the cellular foam or polystyrene type, material used for example in anechoic chambers, this first material being covered with '' a layer of Concrete-Wood ensuring the protection of the layer of cellular alveolar material for example.
- the coating when the latter is attached to the element, and in particular on the panel 1 constituting the latter, may include grooves denoted 100 in the figure. the, these grooves being directed in the direction of the dimension H of the panel 1. These grooves have the function of thus producing the equivalent of a network allowing, as shown in FIG.
- the grooves or corrugations shown on the face of the panel 1 preferably have dimensions of a few centimeters with a repetition step of the corresponding network.
- Figures 1b and the splines are noted with the reference 100.
- the absorbent coating can be provided with grooves in the direction of the height of the panel formed by a network.
- the network can be formed by a succession of slots and steps or grooves of rectangular section.
- the flat panel consists of an absorbent coating added or integrated on the surface subjected to noise. This is an absorbent and insulating system.
- the visor is preferably unique ⁇ ment consists of an absorbent coating.
- This is an absorbent and diffusing system.
- the fact of introducing the aforementioned grooves to form a corresponding network allows, for an incident wave of level 100 dB, to obtain a scattered wave the level of which is 90 dB, ie an attenuation of 10 dB.
- Such a configuration makes it possible to cause a diffusion preferentially to a reflection of the energy. sound source of noise and maximum attenuation of the latter.
- the noise protection element that is the subject of the invention can be stuck in the ground on a support base marked S, the base being buried in the ground and a plurality of elements being assembled in a direction orthogonal to direc ⁇ tion H, perpendicular to the plane of Figure lb and the arrow shown thereon to form a noise barrier.
- test conditions are shown in FIG. 2a for the traditional solution, that is to say when a wall of the conventional type is used.
- the wall had a height of 3.06 m for a thickness of 20 cm, this wall being produced for example by a substantially flat concrete module.
- the line joining the source S and the distal end of this wall is called the limit of the shadow cast by the wall, this line being represented in phantom in Figure 2a at point I.
- the measurement consisted of a differential measurement between a first reference receiver or microphone, marked MR, placed at a distance of 1 m on the line of the shadow line from the wall and a first receiver noted RI was placed on this same line, shadow line of the wall, beyond the wall and in direct view of the source S at a distance of 1 m from the latter, the receiver RI therefore being in direct view of the source S.
- a second receiver R2 was placed at a distance of 5 m from The distal end of the wall and at the same height as the latter. The R2 receiver was placed at a distance of 5 m from the wall beyond it in the direction of noise propagation.
- the receivers RI and R2 make it possible to carry out a differential measurement, which can be, thanks to the reference microphone MR, corrected in addition due to the attenuation of the distance between the source S and the receivers RI and R2 , which allows to deduce the attenuation or losses by insertion in decibels, due to the presence of the wall in the traditional solution I, respectively of the visor element in situation II with or without coating or absorbent coating, respectively situation III. It will be noted that this latter situation corresponds to an inclined wall, height after inclination of 3.03 m, for a slope distance to the ground of 0.44 m.
- the attenuation curve in this case is relatively irregular due to the geometric nature of the element thus formed and the nature of the material used, concrete in the absence of absorbent coating.
- FIG. 2b also shows the situation in which the protective element which is the subject of the present invention is accompanied by an absorbent coating or coating.
- the attenuation dip at the frequency of 250 Hertz is notably attenuated and the average value of the attenuation is appreciably increased, in particular at high frequencies, between 2000 and 4000 at 5000 Hertz, in particular with respect, on the one hand to the traditional solution, and, on the other hand, with respect to the element object of the present invention used in the absence of absorbent coating.
- the tests relating to the inclined wall under the conditions represented in FIG. 2a are represented in the same FIG. 2b and it can be seen that if the general appearance of the corresponding curve corresponds to that of the traditional solution, the inclination has the effect of cause attenuation or loss by insertion higher in the entire frequency range, the attenuation caused by the inclined wall being however not greater than that caused by the noise protection element, object of the present invention, provided with an absorbent coating only for very high frequencies of the order of 4000 Hertz. It will also be noted that for this latter value the attenuation of the inclined wall, although greater, is substantially equivalent to that which was caused by the protective element object of the invention when it is provided with an absorbent coating.
- the overall result of the noise protection element object of the present invention when it is provided with an absorbent coating is higher in all frequency ranges than the solution traditional on the one hand, and on the other hand the corresponding element object of the invention in the absence of absorbent coating, while the attenuation of the noise protection element according to the invention, when that -this is provided with an absorbent coating, is only slightly lower than that caused by the inclined wall in the high frequency range.
- FIG. 2c a comparative diagram has been shown for similar situations for the receiver R2 situated in the geometric shadow of the noise protection.
- Attenuation irregularities There are also attenuation irregularities. tion when the element with visor without absorbent coating or coating is used with an attenuation peak at 500 Hertz whereas when the element with visor in accordance with the object of the present invention is used with an absorbent coating or coating , and a relative minimum attenuation can be highlighted at 250 Hz and the attenuation caused by the latter being always greater than or equal to that caused by the wall inclined at low frequencies between 125 Hz and 250 Hz, l attenuation being on the contrary comparable in the frequency domain beyond 250 Hz.
- FIGS. 2d and 2e show the overall result of the comparative measurements previously described in connection with FIGS. 2b and 2c, these results having been submitted, as regards the measurements as a function of frequency, to a weighted average so as to globalize the attenuation or loss by insertion measured in dBA for a pink noise for which the energy of the noise as a function of the frequency has a substantially uniform distribution, of a noise corresponding to that generated by vehicles on a road then, respectively , a noise corresponding to that generated by a high-speed rail vehicle of the TGV type. It is understood that for the production of the noise diagrams represented in FIGS. 2d and 2e a filtering corresponding by means of suitable filtering templates was used on the aforementioned measurements from the receiver or microphone of reference MR.
- the attenuation provided by the element with visor, object of the invention and provided with an absorbent coating is much greater than the attenuation caused by the traditional solution or even the use of an element with a visor in the absence of a coating or absorbent coating, while this same attenuation is still greater than that obtained by means of an inclined wall.
- the visor 2 can be produced by a concrete veil 200 with a thickness of 3 to 4 cm when an absorbent coating, reference 201, is used.
- the absorbent coating may preferably have a thickness of the order of 5 to 10 cm.
- the absorbent coating is applied to the concrete veil 200 and adhesion to the latter and mechanical cohesion are carried out in accordance with conventional techniques for using this type of material. These operating conditions are known to those skilled in the art and can reduce to the implementation of conventional type concrete.
- the visor 2 can be produced, as well as the silencing panel 1_, by a one-piece concrete element having a comparable thickness of the order of 11 to 15 cm for example.
- angle ⁇ between the plane of the panel proper and said part of the elementary panel l x constituting it and the visor 2, can take the values previously indicated in the description, this depending on desired applications. The same applies to the projected height of the visor h.
- the visor has an edge or border having in a cross section plane of the panel and the visor 2 a continuous curvature.
- the border is denoted 203 in FIG. 3. It is indicated that the border constitutes either a leading edge for the sound energy in direct vision and propagating substantially according to a spherical wave in the plane of FIG. 3, or all less cylindrical when ⁇ the railway vehicle is constituted by a train of very great length compared to the length of one element of protec ⁇ tion against noise object of the present invention, and a trailing edge vis-à-vis the sound energy propagating by reverberation and diffraction by the panel 1 proper and in particular by the network that the latter comprises.
- the leading or trailing edge is straight and parallel to the plane of the panel 1. It will however be noted that this embodiment, although satisfactory, does not allow a substantially analogous processing, depending on the frequency, of the sound energy received in direct or reverberated vision during the diffraction phenomenon, due to the corresponding discontinuity on the upper edge of the border.
- the border forming the leading edge, respectively the trailing edge has a continuously varying radius of curvature in the cross section plane of the panel and of the visor. This radius of curvature has its minimum values at the distal end of the visor, as shown in solid lines in FIG. 3. It will be noted that the lower edge of the border can then however be parallel to the plane of the panel 1.
- the shape of the border thus represented in solid lines in FIG. 3 ensures a more uniform treatment of the phenomenon of diffraction of sound energy as a function of frequency.
- FIGS. 4a and 4b An example of a particularly advantageous use of the noise protection element which is the subject of the present invention will be given in connection with FIGS. 4a and 4b.
- the element according to the invention can be used in order to reduce the noise generated by a traffic lane, a plurality of elements, as shown in FIG. 4a, being mounted contiguously on at least one of the sides of the traffic way. In such a case, the leading edge or border of the visor 2 is directed towards the axis of the taxiway.
- Figure 4a there is shown the use of a protective element according to the object of the present invention in the vicinity of a railroad allowing the movement of a high speed train for example.
- the source of rolling noise being essentially located at the level of the rails
- the anti-noise element in accordance with the object of the present invention and the anti-noise wall thus formed are placed relative to the nearest noise-generating rail, so that the line joining the base of the visor 2 in direct vision and the top of the rail and the horizontal, at this top, constitute an angle of the order of 30 °. It has indeed been observed during experiments carried out on site that the maximum sound energy and therefore noise generated by such a vehicle is obtained for an angle 30 ° from the horizontal.
- each panel has a height xa with x of between 2.5 and 4, 2.5 ⁇ x ⁇ 4. Furthermore, the panels are mounted facing each other. opposite at a distance ya, with including between 3 and 6, 3 ⁇ y ⁇ 6. symmetrically to the axis of the track or to the central axis involved.
- the visors 2 are oriented towards the central axis of the track or towards the central axis involved.
- the noise protection elements constituting the noise barrier object of the present invention can be mounted in a modular manner as described above in the description, depending on the application. considered, a basic elementary panel being fixed in a solid concrete comprising a barbican.
- the use of the noise protection element object of the present invention is not limited to protection against noise generated by rail vehicles traveling at high speed but can also be considered in the case of road or motorway for which the above parameters can be adapted according to the corresponding geometric dimensions, each lane being replaced by an average traffic lane on each roadway.
- the most effective solution in terms of overall loss by insertion is the element comprising a visor provided with an absorbent coating, the gain compared to the traditional solution being of the order 1.5 dBA in the case of road noise, and of the order of 2.0 dBA in the case of railway noise caused by a high-speed train.
- the solution consisting of a visor element in the absence of an absorbent coating can also be used in the case of protection against noise of railway origin.
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Devices Affording Protection Of Roads Or Walls For Sound Insulation (AREA)
- Soundproofing, Sound Blocking, And Sound Damping (AREA)
Abstract
L'invention concerne un élément de protection contre le bruit destiné à former un mur anti-bruit. Chaque élément comprend un élément (1) sensiblement plan de hauteur déterminée et une visière (2) formée par une bande sensiblement plane. La visière aimantée à une extrémité du panneau (1) et le plan contenant la visière sont inclinés par rapport au plan du panneau d'un angle alpha compris entre 7° et 55°. Application à la protection contre le bruit engendré par les véhicules ferroviaires à grande vitesse ou les bruits d'origine routière.The invention relates to a noise shielding element for forming a noise barrier. Each element comprises a substantially plane element (1) of determined height and a visor (2) formed by a substantially flat strip. The magnetic visor at one end of the panel (1) and the plane containing the visor are inclined relative to the plane of the panel by an angle alpha of between 7 ° and 55 °. Application to protection against noise generated by high-speed rail vehicles or noise of road origin.
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9212593A FR2697040B1 (en) | 1992-10-21 | 1992-10-21 | Protection element against noise and its use. |
FR9212593 | 1992-10-21 | ||
PCT/FR1993/001031 WO1994009211A1 (en) | 1992-10-21 | 1993-10-20 | Soundproofing member and use thereof |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0618987A1 true EP0618987A1 (en) | 1994-10-12 |
EP0618987B1 EP0618987B1 (en) | 1996-12-04 |
Family
ID=9434736
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP93924098A Expired - Lifetime EP0618987B1 (en) | 1992-10-21 | 1993-10-20 | Soundproofing member and use thereof |
Country Status (7)
Country | Link |
---|---|
EP (1) | EP0618987B1 (en) |
KR (1) | KR940703960A (en) |
CA (1) | CA2125981A1 (en) |
DE (1) | DE69306377T2 (en) |
ES (1) | ES2095678T3 (en) |
FR (1) | FR2697040B1 (en) |
WO (1) | WO1994009211A1 (en) |
Families Citing this family (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE69511128T2 (en) * | 1994-02-09 | 2000-03-09 | Bridgestone Corp. | Noise barrier |
JP2865275B2 (en) * | 1994-07-20 | 1999-03-08 | 株式会社ブリヂストン | Noise barrier |
MY129435A (en) | 1994-10-26 | 2007-04-30 | Novartis Ag | Pharmaceutical microemulsion preconcentrates |
AT404147B (en) * | 1996-07-30 | 1998-08-25 | Porr Allg Bauges | SOUND PROTECTIVE WALL FOR INSULATING SOUND EMISSIONS FROM TRANSPORT |
FR2768755B1 (en) * | 1997-09-23 | 1999-12-03 | Gilles Giora | MODULAR INTERMEDIATE NOISE PROTECTION ELEMENT FOR MULTI-WAY TRAFFIC AXIS |
FR2774107B1 (en) * | 1998-01-28 | 2000-04-28 | Pic Conseil | ACOUSTIC SHOCK ABSORBER FACING FOR NOISE WALL |
FR2816336A1 (en) * | 2000-11-07 | 2002-05-10 | Richert Andre | Anti-noise barrier for roads comprises wall made up of layer which reflects sound and second, sound-absorbing layer, which faces road, made from wood cement |
DE10312783A1 (en) * | 2003-03-21 | 2004-09-30 | Röhm GmbH & Co. KG | Noise protection wall system consisting of a pedestal and a transparent attachment |
GB0504950D0 (en) | 2005-03-10 | 2005-04-20 | Novartis Ag | Organic compositions |
US20120125711A1 (en) * | 2010-11-24 | 2012-05-24 | Stahr Richard E | Sound absorbing panel and system |
JO3337B1 (en) | 2010-12-13 | 2019-03-13 | Debiopharm Sa | Pharmaceutical Compositions Comprising Alisporivir |
EP2692949B1 (en) * | 2012-08-02 | 2016-12-07 | STRABAG Rail GmbH | Low height noise barrier wall along a railway track and noise barrier wall element for forming such a noise barrier wall |
CA2791965C (en) * | 2012-10-10 | 2013-12-17 | Novus Environmental Inc. | Apparatus and method for controlling airborne pollution |
JP2014127596A (en) * | 2012-12-26 | 2014-07-07 | Asahi Building Wall Co Ltd | Electromagnetic wave reflection panel and road sound insulation wall |
RU198865U1 (en) * | 2019-12-17 | 2020-07-30 | Федеральное государственное бюджетное образовательное учреждение образования "Владимирский Государственный Университет имени Александра Григорьевича и Николая Григорьевича Столетовых" (ВлГУ) | Noise shield to study the effectiveness of noise protection equipment |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH425870A (en) * | 1964-08-19 | 1966-12-15 | Gros Andre | Road safety barrier |
DE2456915A1 (en) * | 1974-12-02 | 1976-08-12 | Acrow Wolff Gmbh | Screens against industrial traffic and similar noise - deflect sound on to sound- absorbing material or into open space |
DE2538667A1 (en) * | 1975-08-30 | 1977-03-10 | Eugen Bauer | Sound absorbent concrete noise screening wall - is open pored on noise side and seal coated on reverse side |
US4138947A (en) * | 1977-04-07 | 1979-02-13 | Pickett William H | Noise barrier |
DE3313813A1 (en) * | 1983-04-16 | 1984-10-25 | Hans Graf Bauunternehmung GmbH + Co KG, 5047 Wesseling | Wall systems |
CH660609A5 (en) * | 1983-08-17 | 1987-05-15 | Hunziker & Cie Ag | Noise prevention element |
DE3809063C2 (en) * | 1988-03-18 | 1993-11-25 | Richard Bitterling | Soundproof wall |
CH678870A5 (en) * | 1988-09-16 | 1991-11-15 | Hunziker & Cie Ag |
-
1992
- 1992-10-21 FR FR9212593A patent/FR2697040B1/en not_active Expired - Fee Related
-
1993
- 1993-10-20 KR KR1019940702175A patent/KR940703960A/en active IP Right Grant
- 1993-10-20 EP EP93924098A patent/EP0618987B1/en not_active Expired - Lifetime
- 1993-10-20 WO PCT/FR1993/001031 patent/WO1994009211A1/en active IP Right Grant
- 1993-10-20 ES ES93924098T patent/ES2095678T3/en not_active Expired - Lifetime
- 1993-10-20 DE DE69306377T patent/DE69306377T2/en not_active Expired - Fee Related
- 1993-10-20 CA CA002125981A patent/CA2125981A1/en not_active Abandoned
Non-Patent Citations (1)
Title |
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See references of WO9409211A1 * |
Also Published As
Publication number | Publication date |
---|---|
WO1994009211A1 (en) | 1994-04-28 |
FR2697040A1 (en) | 1994-04-22 |
KR940703960A (en) | 1994-12-12 |
FR2697040B1 (en) | 1994-12-30 |
ES2095678T3 (en) | 1997-02-16 |
CA2125981A1 (en) | 1994-04-28 |
DE69306377D1 (en) | 1997-01-16 |
DE69306377T2 (en) | 1997-04-03 |
EP0618987B1 (en) | 1996-12-04 |
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