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EP2198096B1 - Device for reducing noise pollution and equipment including such device - Google Patents

Device for reducing noise pollution and equipment including such device Download PDF

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Publication number
EP2198096B1
EP2198096B1 EP08806183A EP08806183A EP2198096B1 EP 2198096 B1 EP2198096 B1 EP 2198096B1 EP 08806183 A EP08806183 A EP 08806183A EP 08806183 A EP08806183 A EP 08806183A EP 2198096 B1 EP2198096 B1 EP 2198096B1
Authority
EP
European Patent Office
Prior art keywords
tab
mounting means
spring
acoustic panel
panel
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.)
Active
Application number
EP08806183A
Other languages
German (de)
French (fr)
Other versions
EP2198096A2 (en
Inventor
Bernard Bastion
Edmond Benarrous
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
AE2S
Original Assignee
AE2S
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Filing date
Publication date
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Publication of EP2198096A2 publication Critical patent/EP2198096A2/en
Application granted granted Critical
Publication of EP2198096B1 publication Critical patent/EP2198096B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/62—Insulation or other protection; Elements or use of specified material therefor
    • E04B1/74—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls
    • E04B1/82—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls specifically with respect to sound only
    • E04B1/84—Sound-absorbing elements
    • E04B1/86—Sound-absorbing elements slab-shaped
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/62—Insulation or other protection; Elements or use of specified material therefor
    • E04B1/74—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls
    • E04B1/82—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls specifically with respect to sound only
    • E04B2001/8263—Mounting of acoustical elements on supporting structure, e.g. framework or wall surface
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/62—Insulation or other protection; Elements or use of specified material therefor
    • E04B1/74—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls
    • E04B1/82—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls specifically with respect to sound only
    • E04B2001/8263—Mounting of acoustical elements on supporting structure, e.g. framework or wall surface
    • E04B2001/8272—Resiliently mounted wall cladding acting as a diaphragmatic sound damper
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/62—Insulation or other protection; Elements or use of specified material therefor
    • E04B1/74—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls
    • E04B1/82—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls specifically with respect to sound only
    • E04B1/84—Sound-absorbing elements
    • E04B2001/8457—Solid slabs or blocks
    • E04B2001/8461—Solid slabs or blocks layered

Definitions

  • the present invention relates to a noise pollution reduction device and an installation comprising at least one copy of this device.
  • Noise pollution is not only unwanted noise which it is desirable to reduce the sound volume, especially when it is not possible to extinguish what generates them.
  • Noise pollution includes everything that affects the audibility of a sound message. For example, part of a sound signal emitted in a room is reflected inwards by the walls of this room, where it adds to the original sound signal and degrades intelligibility.
  • noise barriers to protect the environment from a sound source.
  • noise barriers are found along portions of traffic lanes and around noisy installations.
  • the current noise barriers are generally designed to mainly reflect the sound waves, so that the reduction of noise on one side of a sound barrier usually results in an increase in noise on the side where the sound is located. noise source.
  • acoustic panels covering at least locally the walls delimiting these spaces, which can notably be cinemas, rooms, recording studios and halls. of meeting.
  • the acoustic panels employed generally comprise one or more thicknesses of a porous material, which can for example, having the form of a layer of bonded fibers and in which the medium and high frequency sound waves are well attenuated by absorption.
  • Such panels do not allow to satisfactorily attenuate sounds in the low frequencies, except to have a very large thickness, of the order of more than one meter, which is unacceptable in many applications.
  • acoustic panels are arranged in front of a wall to which they are connected so as to be elastically supported.
  • specific support devices are arranged between the acoustic panels and the wall.
  • Each of them comprises an elastic member by which part of the weight of the acoustic panel is transmitted to the wall.
  • This elastic member must be dimensioned so as to support a portion of the weight of an acoustic panel. This leads to choosing a high stiffness of the elastic member, which does not allow to obtain a satisfactory attenuation of sound waves in the low frequencies.
  • the invention aims at least to improve the reduction of noise pollution, especially in the low frequencies.
  • a noise pollution reduction device comprising an acoustic panel and at least one member for supporting this panel in an elastic manner, this support member comprising first and second mounting means for its installation between a support and the acoustic panel, and a spring portion located between the first and second mounting means.
  • the device for reducing noise pollution is characterized in that said support member comprises a lug whose one end is connected to the second mounting means and which, at a distance from this end, carries the first mounting means such that a moving the acoustic panel perpendicular to its main faces is allowed by an elastic deformation of the spring portion in the direction of a tilting of the tab relative to the second mounting means.
  • the leg of the support member or of each support member acts in the manner of a lever arm making the spring portion of this torsion support member work around at least an axis with respect to which the moment of the weight of the acoustic panel is low or even zero.
  • the stiffness of the spring portion can be sized primarily taking into account acoustic considerations, and not the load that the support member is intended to carry. More precisely, this stiffness may be sufficiently small so that the acoustic panel can easily vibrate horizontally, in particular perpendicular to its main faces, although it is correctly supported vertically.
  • leg of the support member increases the torque that a horizontal force acting on the panel produces on the spring portion of the support member.
  • the invention also relates to an installation comprising a support, characterized in that it comprises a device as defined above, whose acoustic panel is mounted on the support so as to be substantially vertical, particularly via at least one copy of the support member.
  • FIG. 1 On the figure 1 is represented an acoustic panel 1 supported substantially vertically, in front of a wall 2, by three identical members 3 with which this acoustic panel 1 forms a device 4 for reducing noise pollution.
  • the organs 3 are simple and inexpensive to manufacture. One of them is represented alone Figures 2 and 3 . It is made from a spring-loaded metal wire, which is shaped to have four portions extending one to the other, namely a portion forming a mounting lug of the member 3 on the wall 2, a portion forming a helical spring 6, a portion forming a suspension lug 7 and a portion forming a hook 8 hooking the panel 1 by an edge.
  • the spring 6 connects the lug 5 to one end 7A of the suspension lug 7, whose other end 7B is provided with the hook 8.
  • the lug 5 At a distance from the spring 6, the lug 5 comprises a closed loop 9, which delimits a passage 10 for the rod of a fastener such as the screw referenced 11 to the figure 4 .
  • the suspension lug 7 is oblique, that is to say inclined relative to the vertical and the horizontal.
  • This tab 7 and the hook 8 extend in a vertical plane P, which is substantially perpendicular to an axis X 1 -X ' 1 of the spring 6.
  • the hook 8 is curved about an axis X 2 -X' 2 substantially parallel to this axis X 1 -X ' 1 .
  • the suspension lug 7 is angularly offset from the lug 5, about an axis parallel to the axis X 1 -X ' 1 , of an angle which is referenced ⁇ to the figure 4 and which is less than 45 °.
  • the suspension lug 7 can be tilted relative to the lug 5, in the plane P, downwards and upwards, that is to say in the direction of an increase or a reduction of the angle ⁇ , by means of an elastic deformation of the spring 6, which symbolizes the opposite arrows F 1 to the figure 2 .
  • This deformation is effected in the direction of a rotation of the two opposite ends of the spring 6 relative to each other, about the axis X 1 -X ' 1 .
  • the spring 6 can also easily deform in the direction of an angular displacement of its two ends relative to each other about an axis orthogonal to the axis X 1 -X ' 1 . This allows a lateral tilting F 2 of the suspension lug 7 away from the vertical plane P, in a plane parallel to the axis X 1 -X ' 1 , with respect to the lug 5.
  • the acoustic panel 1 comprises two porous and fibrous layers, namely a layer 12 of glass fiber composite bonded by a binder and a layer 13 of wadding covering a main face of the layer 12.
  • the organs 3 of the device 4 are divided into an upper organ and two lower organs, one of which is visible at the figure 4 .
  • Each member 3 is fixed rigidly to the wall 2, without the possibility of tilting, by a screw 11 whose head clamps its loop 9 against this wall 2.
  • the panel 1 is supported by the lower members 3, on the hooks 8 of which rests a lower edge of the layer 12. An upper edge of this layer 12 is attached to the hook 8 of the upper member 3, which is returned for this purpose , relative to the lower organs 3.
  • the axes X 1 -X ' 1 of the springs 6 are substantially horizontal and parallel to the panel 1 and the wall 2. It is the same axis X 2 -X' 2 .
  • the rear main face 14A of the panel 1 is turned towards the wall 2, from which it is separated by an air knife 15.
  • the moment of the weight of the panel 1 relative to the axes X 1 -X ' 1 of these springs 6 is low.
  • the weight of the panel 1 can therefore intervene only to a small extent in the sizing of the springs 6, whose stiffness can be low, in order to facilitate horizontal vibrations of the panel 1.
  • the panel 1 can vibrate perpendicular to its main faces 14A and 14B, as illustrated by the figure 4 where the arrow D symbolizes a displacement of the panel 1 towards the wall 2.
  • This displacement D is accompanied by a tilting B of each lug 7 towards the wall 2, about an axis X 1 -X ' 1 , and of a pivoting R of the panel 1 with respect to each tab 7, in each hook 8, around each axis X 2 -X ' 2 .
  • the panel 1 When it vibrates perpendicular to its main faces 14A and 14B, the panel 1 also moves in the opposite direction to that of the arrow D, in which the device 4 behaves in the same manner as described above, but in the opposite direction.
  • the panel 1 can also vibrate parallel to its main faces 14A and 14B, in the direction of the double arrow V of the figure 1 , thanks to the ability of the legs 7 to tilt laterally.
  • each reference 20 designates a frame receiving a window or a door.
  • These premises comprise two adjoining rooms 21 and 22, separated from each other by a common partition 23.
  • a sound source 24 is disposed in the room 21, a wall 25 of which is provided with a first pair of devices 4.
  • the partition 23 carries a second pair of devices 4 placed in the room 21, facing the first pair of devices 4.
  • the panels 1 of the devices 4 present in the room 21 together cover an area of about 2.25 m 2 , ie 19% of the total surface of the envelope delimiting the interior volume of the part 21.
  • Measurements were made simultaneously in the room 21 and in the room 22, by means of a microphone 26 placed between the two pairs of devices 4 and a microphone 27 disposed in the room 22, near the partition 23.
  • the same measurements, for the same sound produced by the sound source 24, were made in the absence of the devices 4 in the part 21 and also in the case where each of these devices 4 is replaced by a panel 1 fixed by spacers. having the shape of foam blocks.
  • the devices 4 reduce the sound volume both in the room 21 and in the room 22.
  • the noise reduction in the two rooms 21 and 22 is the result of an effective absorption of a room. much of the energy of the sound waves by the devices 4. It has been found that this absorption is effected as well in the low frequencies as in the medium and high frequencies, which is illustrated by a comparison of the curves of the Figure 5A and a comparison of the curves of the Figure 5B .
  • the curve A21 was plotted from the measurements of the sound level in the part 21 equipped with the four devices 4 arranged according to the configuration of the figure 5 , while the curve S21 has been drawn from the measurements of the sound level in the same room 21 in the absence of the devices 4 or any other acoustic panel.
  • the curve A22 was plotted from the measurements of the sound level in the room 22 in the presence of the four devices 4 arranged in the room 21, according to the configuration of the figure 5 while the curve S22 has been drawn from the measurements of the sound level in the same room 22 in the absence of the devices 4 or any other acoustic panel in the room 21.
  • the sound source 24 produced the same sound when the measurements used to draw the curves A21 and A22 were carried out simultaneously and when the measurements used to draw the curves S21 and S22 were carried out simultaneously.
  • the stationary wave rate in the part 21 has been reduced in the presence of the devices 4, which results in an increase in the homogeneity of the acoustic field, this homogeneity being important especially in the case of a musical listening .
  • FIG. 6 there is shown another device 104 for reducing noise pollution.
  • another device 104 for reducing noise pollution.
  • a reference used hereafter to designate a part of the device 104 similar or equivalent to a referenced part of the device 4 is constructed by adding 100 to the device. reference designating this part in the device 4.
  • the acoustic panel 101 is a sandwich panel having two layers 113, which may be made of wadding or other material and between which is the layer of fiberglass composite 112. This panel 101 is mounted via two pairs of members 103, in an opening 30 delimited by a frame-shaped support 102.
  • the frame 102 comprises two uprights each of which carries a pair of members 103 arranged along a lateral edge of the panel 101.
  • each member 103 comprises a pair of inverted bends 31 and 32 which offset a hook 108 inwardly relative to the spring 106 forming part of the same member 103 as the hook 108.
  • the two members 103 on the same side of the panel 101 differ from each other in that the elbows 31 and 32 of one are reversed relative to the elbows 31 and 32 of the other.
  • each tab 107 comprises another pair of inverted elbows 33 and 34, which curve in the plane of the figure 7 and thanks to which the hook 108 of an organ 103 is in the extension of the tab 105 of this member 103.
  • FIG 8 On the figure 8 is represented a room in which are installed several horizontal rows and adjoining devices 204 for reducing noise pollution. These devices 204 are carried by a wall 202 of the room. Similar to each other, they are according to a third embodiment of the invention. In what follows, only what distinguishes them from a device 4 is described. In addition, a reference used to designate a part of a device 204 similar or equivalent to a referenced part of the device 4 is constructed by adding two hundred to the reference identifying this part in the device 4.
  • the panel 201 of a device 204 is an integral piece, which is compression molded and whose substantially homogeneous material is an agglomerate of fibers, such as glass fibers, united by a polymeric binder. Over the entire length of its periphery, the panel 201 comprises a flange 250 which stiffens it and which is directed towards the rear.
  • Each panel 201 is mounted on the wall 202 by means of four mounting systems, which are distributed at its four corners.
  • each of these mounting systems 251A and 251B comprises a metal base 252A or 252B fixed to the wall 202 by a screw 211, as well as at least one support member 203 immobilized on this base by a locking key 253.
  • the metal bases 251A or 251B mounting systems are of two types. A base of one of these two types is referenced 252A at the figure 10 . A base of the other type is referenced 252B at the figure 12 .
  • each base 252A comprises a single branch 254, which rigidly connects a fixing ring 255 to a mounting portion 256 of a member 203.
  • the ring 255 is provided for fixing the base 252A by clamping against the wall 202, by means of a screw 21 whose rod passes in this ring.
  • the portion 256 has the shape of a bulge and comprises locking means by means of which a key 253 provided with complementary means can be immobilized in a position of retention of a member 203.
  • These locking means known in themselves, are hidden by key 253 at the figure 10 .
  • they may be of the helical ramp type.
  • a member 203 is shown alone at the figure 11 .
  • Its portion 209 is a laterally open ring, which extends only half a turn. It is extended by a safety loop 260 which surrounds the tab 207 so as to limit the angular displacement and which therefore forms a stop for this leg 207.
  • the loop 260 prevents the tab 207 can be tilted by a excessive amount forward, that is to say in the direction of the arrow B ', which could lead to a deterioration of the member 203, for example in the case of too much traction on a panel 201 due to an awkward gesture or accidental attachment of this panel by a person or a moving object.
  • An elbow 261 substantially at right angles connects the tab 207 to the hook 208, whereby this hook 208 is tilted a quarter of a turn relative to the tab 207, so as to project forwardly and to be able to this fact be inserted into a retaining clip 262 rigidly associated with the flange 250 of a panel 201.
  • Each panel 201 has four clips 262, in which four hooks 208 are inserted during the assembly of this panel, so as to be thereafter retained.
  • Each base 252A is part of one of several mounting systems 251A, which are at the left and right ends of the panel rows 201.
  • Each mounting system 251B is placed at a separation slot between two consecutive panels 201 .
  • FIG 12 On the figure 12 is represented such a mounting system 251B, which participates in the support of two consecutive and adjacent panels 201 of the same horizontal row of panels 201.
  • its base 252B carries two members 203, each of which partially supports one of these two panels 201.
  • This base 252B comprises two mounting portions 256 and two branches 254, each of which connects a single ring 255 to one of these two portions 256.
  • the half-loop 209 of one of the two members 203 is fixed rigidly by a key 253.
  • This action consists in making turn key 253 a quarter of a turn, as illustrated by arrow A at figure 13 .
  • the keys 253 can be replaced by traditional screws, with a corresponding adaptation of the portions 256.
  • the invention is not limited to the embodiments described above.
  • the number of members 3 or 103 in a device 4 or 104 may be different from those mentioned above.
  • the lug 5 or 105 of a member 3 or 103 may be fixed to the acoustic panel 1 or 101, in which case the hook 8 or 108 of this member is hooked to an axis fixed to the support 2 or 102.
  • the tab 7 or 107 may form the spring portion of the member 3 or 103 or, at least, be part thereof, being able to be bent elastically.
  • the members 3 may not be made of a wire.
  • they can be made of polymer, by injection, in which case they can be in one piece with a part of the acoustic panel.
  • the acoustic panel 1 or 101 may have only one layer 12 or 13 or 112 or 113. It can also have more than three.

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  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Electromagnetism (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Building Environments (AREA)
  • Fittings On The Vehicle Exterior For Carrying Loads, And Devices For Holding Or Mounting Articles (AREA)
  • Mounting Components In General For Electric Apparatus (AREA)
  • Details Of Audible-Bandwidth Transducers (AREA)

Abstract

A device for reducing noise pollution includes an acoustic panel (1) and at least one member (3) for elastically holding the panel (1). This holding member (3) includes: first and second mounting elements (8) for installing the same between a support (2) and panel (1), a spring portion (6) provided between the first and second mounting elements, a tab (7) having one end connected to the second mounting element (5) and bearing, at a distance from the end, the first mounting element (8) so that movement (D) of the acoustic panel (1) perpendicularly to the main faces (14A, 14B) thereof is permitted by an elastic deformation of the spring portion (6) in the tilting direction of the tab (7) relative to the second mounting element (5).

Description

DOMAINE DE L'INVENTIONFIELD OF THE INVENTION

La présente invention concerne un dispositif de réduction de pollutions sonores et une installation comportant au moins un exemplaire de ce dispositif.The present invention relates to a noise pollution reduction device and an installation comprising at least one copy of this device.

Les pollutions sonores ne sont pas uniquement constituées des bruits indésirables dont il est souhaitable d'atténuer le volume sonore, en particulier lorsqu'il n'est pas possible d'éteindre ce qui les génère. Les pollutions sonores comprennent tout ce qui nuit à l'audibilité d'un message sonore. Par exemple, une partie d'un signal sonore émis dans une pièce est réfléchie vers l'intérieur par les parois de cette pièce, où elle s'ajoute au signal sonore d'origine et en dégrade l'intelligibilité.Noise pollution is not only unwanted noise which it is desirable to reduce the sound volume, especially when it is not possible to extinguish what generates them. Noise pollution includes everything that affects the audibility of a sound message. For example, part of a sound signal emitted in a room is reflected inwards by the walls of this room, where it adds to the original sound signal and degrades intelligibility.

Pour mémoire, on rappelle que l'énergie d'une onde sonore rencontrant une paroi est pour partie réfléchie par cette paroi, pour partie transmise à travers la paroi et pour partie absorbée dans la paroi, c'est-à-dire dissipé par friction, en chaleur.For the record, it is recalled that the energy of a sound wave meeting a wall is partly reflected by this wall, partly transmitted through the wall and partly absorbed in the wall, that is to say dissipated by friction , in heat.

TECHNIQUES ANTERIEURESPRIOR TECHNIQUES

L'emploi de murs ou d'écrans anti-bruit pour protéger l'environnement d'une source sonore est désormais courant. Par exemple, on trouve de tels murs anti-bruit le long de portions de voies de circulation et autour d'installations bruyantes. Les murs anti-bruit actuels sont généralement conçus pour principalement réfléchir les ondes sonores, si bien que la réduction des nuisances sonores d'un côté d'un mur anti-bruit se traduit généralement par un accroissement de ces nuisances du côté où se trouve la source du bruit.The use of walls or noise barriers to protect the environment from a sound source is now commonplace. For example, such noise barriers are found along portions of traffic lanes and around noisy installations. The current noise barriers are generally designed to mainly reflect the sound waves, so that the reduction of noise on one side of a sound barrier usually results in an increase in noise on the side where the sound is located. noise source.

Par ailleurs, il est connu d'améliorer le confort acoustique d'espaces au moyen de panneaux acoustiques recouvrant au moins localement les parois délimitant ces espaces, qui peuvent notamment être des salles de cinéma, des chambres, des studios d'enregistrement et des salles de réunion. Les panneaux acoustiques employés comprennent généralement une ou plusieurs épaisseurs d'un matériau poreux, qui peut par exemple présenter la forme d'une couche de fibres liées et dans lequel les ondes sonores de moyenne et de haute fréquence sont bien atténuées par absorption. De tels panneaux ne permettent toutefois pas d'atténuer de manière satisfaisante des sons dans les basses fréquences, sauf à présenter une épaisseur très importante, de l'ordre de plus d'un mètre, ce qui est rédhibitoire dans nombre d'applications.Furthermore, it is known to improve the acoustic comfort of spaces by means of acoustic panels covering at least locally the walls delimiting these spaces, which can notably be cinemas, rooms, recording studios and halls. of meeting. The acoustic panels employed generally comprise one or more thicknesses of a porous material, which can for example, having the form of a layer of bonded fibers and in which the medium and high frequency sound waves are well attenuated by absorption. Such panels, however, do not allow to satisfactorily attenuate sounds in the low frequencies, except to have a very large thickness, of the order of more than one meter, which is unacceptable in many applications.

Dans le document FR-2 836 497 , il est proposé une solution contre les ondes sonores dans les basses fréquences. Dans cette solution, des panneaux acoustiques sont disposés devant une paroi à laquelle ils sont reliés de manière à être supportés élastiquement. A cet effet, des dispositifs de support spécifiques sont disposés entre les panneaux acoustiques et la paroi. Chacun d'eux comprend un organe élastique par lequel une partie du poids du panneau acoustique est transmis à la paroi. Cet organe élastique doit donc être dimensionné de manière à pouvoir supporter une partie du poids d'un panneau acoustique. Cela conduit à choisir une raideur élevée de l'organe élastique, qui ne permet pas d'obtenir une atténuation satisfaisante des ondes sonores dans les basses fréquences.In the document FR-2,836,497 , it is proposed a solution against the sound waves in the low frequencies. In this solution, acoustic panels are arranged in front of a wall to which they are connected so as to be elastically supported. For this purpose, specific support devices are arranged between the acoustic panels and the wall. Each of them comprises an elastic member by which part of the weight of the acoustic panel is transmitted to the wall. This elastic member must be dimensioned so as to support a portion of the weight of an acoustic panel. This leads to choosing a high stiffness of the elastic member, which does not allow to obtain a satisfactory attenuation of sound waves in the low frequencies.

EXPOSE DE L'INVENTIONSUMMARY OF THE INVENTION

L'invention a au moins pour but d'améliorer la réduction de pollutions sonores, notamment dans les basses fréquences.The invention aims at least to improve the reduction of noise pollution, especially in the low frequencies.

Selon l'invention, ce but est atteint grâce à un dispositif de réduction de pollutions sonores, comprenant un panneau acoustique et au moins un organe de support de ce panneau de manière élastique, cet organe de support comportant des premiers et deuxièmes moyens de montage pour son installation entre un support et le panneau acoustique, ainsi qu'une partie ressort située entre les premiers et deuxièmes moyens de montage. Le dispositif de réduction de pollutions sonores est caractérisé en ce que ledit organe de support comporte une patte dont une extrémité est reliée aux deuxièmes moyens de montage et qui, à distance de cette extrémité, porte les premiers moyens de montage de telle manière qu'un déplacement du panneau acoustique perpendiculairement à ses faces principales soit autorisé par une déformation élastique de la partie ressort dans le sens d'un basculement de la patte par rapport aux deuxièmes moyens de montage.According to the invention, this object is achieved by means of a noise pollution reduction device, comprising an acoustic panel and at least one member for supporting this panel in an elastic manner, this support member comprising first and second mounting means for its installation between a support and the acoustic panel, and a spring portion located between the first and second mounting means. The device for reducing noise pollution is characterized in that said support member comprises a lug whose one end is connected to the second mounting means and which, at a distance from this end, carries the first mounting means such that a moving the acoustic panel perpendicular to its main faces is allowed by an elastic deformation of the spring portion in the direction of a tilting of the tab relative to the second mounting means.

Lors de vibrations horizontales du panneau acoustique, la patte de l'organe de support ou de chaque organe de support agit à la manière d'un bras de levier faisant travailler la partie ressort de cet organe de support en torsion, autour d'au moins un axe par rapport auquel le moment du poids du panneau acoustique est faible, voire nul. De ce fait, la raideur de la partie ressort peut être dimensionnée en tenant principalement compte de considérations acoustiques, et non de la charge que l'organe de support est destiné à porter. Plus précisément, cette raideur peut être suffisamment faible pour que le panneau acoustique puisse aisément vibrer horizontalement, en particulier perpendiculairement à ses faces principales, bien qu'étant correctement supporté verticalement.During horizontal vibrations of the acoustic panel, the leg of the support member or of each support member acts in the manner of a lever arm making the spring portion of this torsion support member work around at least an axis with respect to which the moment of the weight of the acoustic panel is low or even zero. As a result, the stiffness of the spring portion can be sized primarily taking into account acoustic considerations, and not the load that the support member is intended to carry. More precisely, this stiffness may be sufficiently small so that the acoustic panel can easily vibrate horizontally, in particular perpendicular to its main faces, although it is correctly supported vertically.

En outre, la patte de l'organe de support augmente le couple qu'une force horizontale agissant sur le panneau produit sur la partie ressort de cet organe de support.In addition, the leg of the support member increases the torque that a horizontal force acting on the panel produces on the spring portion of the support member.

D'autres caractéristiques avantageuses de ce dispositif de réduction de pollutions sonores peuvent être que :

  • la partie ressort comprend un ressort hélicoïdal reliant la patte aux deuxièmes moyens de montage ;
  • le ressort comprend plusieurs spires non jointives ;
  • ladite patte est sensiblement orthogonale à un axe du ressort ;
  • l'organe de support comprend un fil métallique mis en forme de manière à comprendre au moins deux portions se prolongeant mutuellement, à savoir une portion formant ledit ressort et une portion formant ladite patte ;
  • le fil métallique de l'organe de support comporte une portion limitant ledit basculement de la patte au moins dans un sens, en formant une butée pour cette patte ;
  • lesdits premiers moyens de montage sont prévus pour former une liaison autorisant un pivotement autour d'un axe de pivotement sensiblement parallèle au panneau acoustique ;
  • lesdits premiers moyens de montage comportent un crochet recourbé autour dudit axe de pivotement ;
  • lesdits deuxièmes moyens de montage sont prévus pour former une liaison sans possibilité de basculement de l'organe de support autour d'un axe parallèle audit axe de pivotement ;
  • lesdits deuxièmes moyens de montage comportent une boucle rigide délimitant un passage pour un organe de serrage de cette boucle contre une surface.
Other advantageous features of this device for reducing noise pollution may be that:
  • the spring portion comprises a coil spring connecting the tab to the second mounting means;
  • the spring comprises several non-contiguous turns;
  • said tab is substantially orthogonal to an axis of the spring;
  • the support member comprises a metal wire shaped to comprise at least two mutually extending portions, namely a portion forming said spring and a portion forming said tab;
  • the wire of the support member comprises a portion limiting said tilting of the tab at least in one direction, forming a stop for this tab;
  • said first mounting means are provided to form a link allowing pivoting about a pivot axis substantially parallel to the acoustic panel;
  • said first mounting means comprises a hook bent around said pivot axis;
  • said second mounting means are provided to form a link without the possibility of tilting of the support member about an axis parallel to said pivot axis;
  • said second mounting means comprise a rigid loop defining a passage for a clamping member of this loop against a surface.

L'invention a également pour objet une installation comportant un support, caractérisée en ce qu'elle comporte un dispositif tel que défini ci-dessus, dont le panneau acoustique est monté sur le support de manière à être sensiblement vertical, par l'intermédiaire notamment d'au moins un exemplaire de l'organe de support.The invention also relates to an installation comprising a support, characterized in that it comprises a device as defined above, whose acoustic panel is mounted on the support so as to be substantially vertical, particularly via at least one copy of the support member.

D'autres caractéristiques avantageuses de cette installation peuvent être que :

  • une face principale du panneau acoustique est tournée vers une paroi du support et séparée de cette paroi par une lame d'air ;
  • les premiers moyens de montage se trouvent à une extrémité inférieure de ladite patte de manière que cette patte soit essentiellement sollicitée longitudinalement par le poids du panneau acoustique ;
  • le ressort comporte un axe sensiblement horizontal ;
  • la déformation élastique autorisant un déplacement du panneau acoustique perpendiculairement à ses faces principales s'effectue dans le sens d'une rotation de première et deuxième extrémités du ressort l'une par rapport à l'autre, autour d'un axe de ce ressort ;
  • un déplacement du panneau acoustique parallèlement à ses faces principales est autorisé par une déformation élastique de la partie ressort dans le sens d'un basculement de la patte par rapport aux deuxièmes moyens de montage.
Other advantageous features of this installation may be that:
  • a main face of the acoustic panel is turned towards a wall of the support and separated from this wall by an air gap;
  • the first mounting means are at a lower end of said tab so that this tab is essentially biased longitudinally by the weight of the acoustic panel;
  • the spring has a substantially horizontal axis;
  • the elastic deformation allowing a displacement of the acoustic panel perpendicular to its main faces is carried out in the direction of a rotation of first and second ends of the spring relative to each other, about an axis of this spring;
  • a displacement of the acoustic panel parallel to its main faces is allowed by an elastic deformation of the spring portion in the direction of a tilting of the tab relative to the second mounting means.

BREVE DESCRIPTION DES FIGURESBRIEF DESCRIPTION OF THE FIGURES

L'invention sera bien comprise à la lecture de la description qui va suivre, donnée uniquement à titre d'exemple et faite en se référant aux dessins annexés, parmi lesquels :

  • la figure 1 est une vue de face d'un premier mode de réalisation d'un dispositif conforme à l'invention et prévu pour réduire des pollutions sonores ;
  • la figure 2 est une vue en perspective d'un organe de support dont trois exemplaires font partie du dispositif de la figure 1 ;
  • la figure 3 est une vue de face de l'organe de support de la figure 2 ;
  • la figure 4 est une vue partielle, en coupe selon la ligne IV-IV de la figure 1 ;
  • la figure 5 est un plan schématique de locaux d'expérimentation du dispositif des figures 1 et 4 ;
  • la figure 5A est une représentation graphique du niveau sonore mesuré dans la pièce référencée 21 à la figure 5, en fonction de la fréquence, à la fois dans le cas où cette pièce 21 est équipée de quatre exemplaires du dispositif des figures 1 et 4, c'est-à-dire dans la configuration de la figure 5 (courbe A21), et dans le cas où ces quatre exemplaires sont absents (courbe S21) ;
  • la figure 5B est une représentation graphique du niveau sonore mesuré dans la pièce référencée 22 à la figure 5, en fonction de la fréquence, à la fois dans le cas où la pièce 21 est équipée de quatre exemplaires du dispositif des figures 1 et 4, c'est-à-dire dans la configuration de la figure 5 (courbe A22), et dans le cas où ces quatre exemplaires sont absents (courbe S22) ;
  • la figure 6 est une vue de face, avec arrachement, d'un dispositif de réduction de pollutions sonores selon un deuxième mode de réalisation de l'invention ; et
  • la figure 7 est une vue latérale d'un organe de support dont quatre exemplaires font partie du dispositif de la figure 6
  • la figure 8 est une vue en perspective d'une portion de salle dont un mur porte deux rangée horizontales et attenantes de plusieurs dispositif de réduction de pollutions sonores selon un troisième mode de réalisation de l'invention ;
  • la figure 9 est une coupe transversale, selon le plan IX de la figure 8, et représente une bordure d'un panneau constitutif d'un des dispositifs de réduction des pollutions sonores de la figure 8 ;
  • la figure 10 est une vue en perspective d'un système de montage constitutif de l'un des dispositifs de réduction de pollutions sonores de la figure 8 ;
  • la figure 11 est une vue en perspective d'un organe de support constitutif du système de montage de la figure 10 ;
  • la figure 12 est une vue de face d'un système de montage constitutif de deux dispositifs attenants de réduction de pollutions sonores de la figure 8 ;
  • la figure 13 est une vue qui est analogue à la figure 12, qui représente le même système de montage que cette figure 12 et qui illustre une étape de son installation.
The invention will be better understood on reading the description which follows, given solely by way of example and with reference to the appended drawings, among which:
  • the figure 1 is a front view of a first embodiment of a device according to the invention and intended to reduce noise pollution;
  • the figure 2 is a perspective view of a support member of which three copies are part of the device of the figure 1 ;
  • the figure 3 is a front view of the support member of the figure 2 ;
  • the figure 4 is a partial view, in section along the line IV-IV of the figure 1 ;
  • the figure 5 is a schematic plan of experimental premises of the device of the figures 1 and 4 ;
  • the Figure 5A is a graphical representation of the sound level measured in the room referenced 21 at the figure 5 , depending on the frequency, both in the case where this part 21 is equipped with four copies of the device of the figures 1 and 4 , that is, in the configuration of the figure 5 (curve A21), and in the case where these four copies are absent (curve S21);
  • the Figure 5B is a graphical representation of the sound level measured in the room referenced 22 at the figure 5 , depending on the frequency, both in the case where the part 21 is equipped with four copies of the device of the figures 1 and 4 , that is, in the configuration of the figure 5 (curve A22), and in the case where these four copies are absent (curve S22);
  • the figure 6 is a front view, with tear, of a noise pollution reduction device according to a second embodiment of the invention; and
  • the figure 7 is a side view of a support member four of which are part of the device of the figure 6
  • the figure 8 is a perspective view of a room portion of which a wall carries two horizontal and adjoining rows of several noise pollution reduction device according to a third embodiment of the invention;
  • the figure 9 is a cross-section, according to plan IX of the figure 8 , and represents a border of a constituent panel of one of the noise pollution reduction devices of the figure 8 ;
  • the figure 10 is a perspective view of a mounting system constituting one of the sound pollution reduction devices of the figure 8 ;
  • the figure 11 is a perspective view of a support member constituting the mounting system of the figure 10 ;
  • the figure 12 is a front view of a mounting system constituting two adjoining devices for reducing noise pollution of the figure 8 ;
  • the figure 13 is a view that is analogous to the figure 12 , which represents the same editing system as this figure 12 and that illustrates a step in his installation.

MANIERES POSSIBLES DE REALISER L'INVENTIONPOSSIBLE WAYS OF REALIZING THE INVENTION

Sur la figure 1 est représenté un panneau acoustique 1 supporté de manière sensiblement verticale, devant une paroi 2, par trois organes 3 identiques avec lesquels ce panneau acoustique 1 forme un dispositif 4 de réduction de pollutions sonores.On the figure 1 is represented an acoustic panel 1 supported substantially vertically, in front of a wall 2, by three identical members 3 with which this acoustic panel 1 forms a device 4 for reducing noise pollution.

Les organes 3 sont simples et peu coûteux à fabriquer. L'un d'eux est représenté seul aux figures 2 et 3. Il est réalisé à partir d'un fil de métal à ressort, qui est conformé de manière à comporter quatre portions se prolongeant l'une l'autre, à savoir une portion formant une patte 5 de montage de l'organe 3 sur la paroi 2, une portion formant un ressort hélicoïdal 6, une portion formant une patte de suspension 7 et une portion formant un crochet 8 d'accrochage du panneau 1 par un bord. Le ressort 6 relie la patte 5 à une extrémité 7A de la patte de suspension 7, dont l'autre extrémité 7B est pourvue du crochet 8.The organs 3 are simple and inexpensive to manufacture. One of them is represented alone Figures 2 and 3 . It is made from a spring-loaded metal wire, which is shaped to have four portions extending one to the other, namely a portion forming a mounting lug of the member 3 on the wall 2, a portion forming a helical spring 6, a portion forming a suspension lug 7 and a portion forming a hook 8 hooking the panel 1 by an edge. The spring 6 connects the lug 5 to one end 7A of the suspension lug 7, whose other end 7B is provided with the hook 8.

A distance du ressort 6, la patte 5 comporte une boucle fermée 9, qui délimite un passage 10 pour la tige d'un organe de fixation tel que la vis référencée 11 à la figure 4.At a distance from the spring 6, the lug 5 comprises a closed loop 9, which delimits a passage 10 for the rod of a fastener such as the screw referenced 11 to the figure 4 .

La patte de suspension 7 est oblique, c'est-à-dire inclinée par rapport à la verticale et l'horizontale. Cette patte 7 et le crochet 8 s'étendent selon un plan vertical P, qui est sensiblement perpendiculaire à un axe X1-X'1 du ressort 6. Le crochet 8 se recourbe autour d'un axe X2-X'2 sensiblement parallèle à cet axe X1-X'1.The suspension lug 7 is oblique, that is to say inclined relative to the vertical and the horizontal. This tab 7 and the hook 8 extend in a vertical plane P, which is substantially perpendicular to an axis X 1 -X ' 1 of the spring 6. The hook 8 is curved about an axis X 2 -X' 2 substantially parallel to this axis X 1 -X ' 1 .

La patte de suspension 7 est décalée angulairement de la patte 5, autour d'un axe parallèle à l'axe X1-X'1, d'un angle qui est référencé α à la figure 4 et qui est inférieur à 45°.The suspension lug 7 is angularly offset from the lug 5, about an axis parallel to the axis X 1 -X ' 1 , of an angle which is referenced α to the figure 4 and which is less than 45 °.

La patte de suspension 7 peut être basculée par rapport à la patte 5, dans le plan P, vers le bas et vers le haut, c'est-à-dire dans le sens d'une augmentation ou d'une réduction de l'angle α, moyennant une déformation élastique du ressort 6, ce que symbolisent les flèches opposées F1 à la figure 2. Cette déformation s'effectue dans le sens d'une rotation des deux extrémités opposées du ressort 6 l'une par rapport à l'autre, autour de l'axe X1-X'1.The suspension lug 7 can be tilted relative to the lug 5, in the plane P, downwards and upwards, that is to say in the direction of an increase or a reduction of the angle α, by means of an elastic deformation of the spring 6, which symbolizes the opposite arrows F 1 to the figure 2 . This deformation is effected in the direction of a rotation of the two opposite ends of the spring 6 relative to each other, about the axis X 1 -X ' 1 .

Comme ses spires sont non jointives, le ressort 6 peut également se déformer aisément dans le sens d'un déplacement angulaire de ses deux extrémités l'une par rapport à l'autre autour d'un axe orthogonal à l'axe X1-X'1. Cela autorise un basculement latéral F2 de la patte de suspension 7 à l'écart du plan vertical P, dans un plan parallèle à l'axe X1-X'1, par rapport à la patte 5.As its turns are not contiguous, the spring 6 can also easily deform in the direction of an angular displacement of its two ends relative to each other about an axis orthogonal to the axis X 1 -X ' 1 . This allows a lateral tilting F 2 of the suspension lug 7 away from the vertical plane P, in a plane parallel to the axis X 1 -X ' 1 , with respect to the lug 5.

Ainsi qu'on peut le voir à la figure 4, le panneau acoustique 1 comporte deux couches poreuses et fibreuses, à savoir une couche 12 de composite à fibres de verre unies par un liant et une couche 13 de ouate recouvrant une face principale de la couche 12.As can be seen at figure 4 the acoustic panel 1 comprises two porous and fibrous layers, namely a layer 12 of glass fiber composite bonded by a binder and a layer 13 of wadding covering a main face of the layer 12.

Les organes 3 du dispositif 4 se répartissent en un organe supérieur et deux organes inférieurs, dont un est visible à la figure 4. Chaque organe 3 est fixé rigidement à la paroi 2, sans possibilité de basculement, par une vis 11 dont la tête serre sa boucle 9 contre cette paroi 2.The organs 3 of the device 4 are divided into an upper organ and two lower organs, one of which is visible at the figure 4 . Each member 3 is fixed rigidly to the wall 2, without the possibility of tilting, by a screw 11 whose head clamps its loop 9 against this wall 2.

Le panneau 1 est supporté par les organes 3 inférieurs, sur les crochets 8 desquels repose un bord inférieur de la couche 12. Un bord supérieur de cette couche 12 est accroché au crochet 8 de l'organe 3 supérieur, qui est retourné à cet effet, par rapport aux organes 3 inférieurs. Les axes X1-X'1 des ressorts 6 sont sensiblement horizontaux et parallèles au panneau 1 et à la paroi 2. Il en est de même des axes X2-X'2. La face principale arrière 14A du panneau 1 est tournée vers la paroi 2, dont elle est séparée par une lame d'air 15.The panel 1 is supported by the lower members 3, on the hooks 8 of which rests a lower edge of the layer 12. An upper edge of this layer 12 is attached to the hook 8 of the upper member 3, which is returned for this purpose , relative to the lower organs 3. The axes X 1 -X ' 1 of the springs 6 are substantially horizontal and parallel to the panel 1 and the wall 2. It is the same axis X 2 -X' 2 . The rear main face 14A of the panel 1 is turned towards the wall 2, from which it is separated by an air knife 15.

On déduit de ce qui précède qu'il est aisé et rapide d'installer un dispositif 4.From the foregoing it can be deduced that it is easy and quick to install a device 4.

Grâce à l'inclinaison importante des pattes 7 des organes 3 inférieurs de telle manière que leurs crochets 8 soient plus bas que leurs ressorts 6, le moment du poids du panneau 1 par rapport aux axes X1-X'1 de ces ressorts 6 est faible. Le poids du panneau 1 peut donc n'intervenir que dans une faible mesure dans le dimensionnement des ressorts 6, dont la raideur peut être faible, afin de faciliter des vibrations horizontales du panneau 1.Thanks to the substantial inclination of the lugs 7 of the lower members 3 so that their hooks 8 are lower than their springs 6, the moment of the weight of the panel 1 relative to the axes X 1 -X ' 1 of these springs 6 is low. The weight of the panel 1 can therefore intervene only to a small extent in the sizing of the springs 6, whose stiffness can be low, in order to facilitate horizontal vibrations of the panel 1.

Le panneau 1 peut vibrer perpendiculaire à ses faces principales 14A et 14B, ce qu'illustre la figure 4 où la flèche D symbolise un déplacement du panneau 1 vers la paroi 2. Ce déplacement D s'accompagne d'un basculement B de chaque patte 7 vers la paroi 2, autour d'un axe X1-X'1, et d'un pivotement R du panneau 1 par rapport à chaque patte 7, dans chaque crochet 8, autour de chaque axe X2-X'2. Lorsqu'il vibre perpendiculairement à ses faces principales 14A et 14B, le panneau 1 se déplace également dans la direction opposée à celle de la flèche D, lors de quoi le dispositif 4 se comporte de la même manière que décrit ci-dessus, mais dans le sens inverse.The panel 1 can vibrate perpendicular to its main faces 14A and 14B, as illustrated by the figure 4 where the arrow D symbolizes a displacement of the panel 1 towards the wall 2. This displacement D is accompanied by a tilting B of each lug 7 towards the wall 2, about an axis X 1 -X ' 1 , and of a pivoting R of the panel 1 with respect to each tab 7, in each hook 8, around each axis X 2 -X ' 2 . When it vibrates perpendicular to its main faces 14A and 14B, the panel 1 also moves in the opposite direction to that of the arrow D, in which the device 4 behaves in the same manner as described above, but in the opposite direction.

Le panneau 1 peut également vibrer parallèlement à ses faces principales 14A et 14B, dans la direction de la double flèche V de la figure 1, grâce à l'aptitude des pattes 7 à basculer latéralement.The panel 1 can also vibrate parallel to its main faces 14A and 14B, in the direction of the double arrow V of the figure 1 , thanks to the ability of the legs 7 to tilt laterally.

Des tests ont été conduits dans les locaux représentés à la figure 5, où chaque référence 20 désigne une huisserie recevant une fenêtre ou une porte. Ces locaux comprennent deux pièces mitoyennes 21 et 22, séparées l'une de l'autre par une cloison commune 23. Une source sonore 24 est disposée dans la pièce 21, dont une paroi 25 est pourvue d'une première paire de dispositifs 4. La cloison 23 porte une deuxième paire de dispositifs 4, placés dans la pièce 21, en regard de la première paire de dispositifs 4. Les panneaux 1 des dispositifs 4 présents dans la pièce 21 couvrent ensemble une surface d'environ 2,25 m2, soit 19 % de la surface totale de l'enveloppe délimitant le volume intérieur de la pièce 21.Tests were conducted in the premises represented at figure 5 , where each reference 20 designates a frame receiving a window or a door. These premises comprise two adjoining rooms 21 and 22, separated from each other by a common partition 23. A sound source 24 is disposed in the room 21, a wall 25 of which is provided with a first pair of devices 4. The partition 23 carries a second pair of devices 4 placed in the room 21, facing the first pair of devices 4. The panels 1 of the devices 4 present in the room 21 together cover an area of about 2.25 m 2 , ie 19% of the total surface of the envelope delimiting the interior volume of the part 21.

Des mesures ont été effectuées simultanément dans la pièce 21 et dans la pièce 22, au moyen d'un microphone 26 placé entre les deux paires de dispositifs 4 et d'un microphone 27 disposé dans la pièce 22, à proximité de la cloison 23. Les mêmes mesures, pour un même son produit par la source sonore 24, ont été effectuées en l'absence des dispositifs 4 dans la pièce 21 et également dans le cas où chacun de ces dispositifs 4 est remplacé par un panneau 1 fixé par des entretoises présentant la forme de blocs de mousse.Measurements were made simultaneously in the room 21 and in the room 22, by means of a microphone 26 placed between the two pairs of devices 4 and a microphone 27 disposed in the room 22, near the partition 23. The same measurements, for the same sound produced by the sound source 24, were made in the absence of the devices 4 in the part 21 and also in the case where each of these devices 4 is replaced by a panel 1 fixed by spacers. having the shape of foam blocks.

Les résultats des tests effectués dans les conditions présentées ci-dessus sont regroupés dans le tableau suivant : niveau de bruit (dB) temps de réverbération (s) (dans la pièce 21) indice de clarté (%) (dans la pièce 21) dans la pièce 22 dans la pièce 21 sans aucun dispositif 4, ni panneau 1 60,6 94,6 0,445 81,1 avec quatre dispositifs 4, dans la configuration de la figure 5 57,7 91 0,180 98,6 avec quatre panneaux 1 fixés par l'intermédiaire de calles en mousse, à la place des quatre dispositifs 4 59,4 91,7 0,200 97,8 The results of the tests carried out under the conditions presented above are grouped in the following table: noise level (dB) reverberation time (s) (in room 21) clarity index (%) (in room 21) in room 22 in room 21 without any device 4, nor panel 1 60.6 94.6 0.445 81.1 with four devices 4, in the configuration of the figure 5 57.7 91 0,180 98.6 with four panels 1 fixed via foam calluses, in place of the four devices 4 59.4 91.7 0,200 97.8

Il ressort du contenu de ce tableau que les dispositifs 4 réduisent le volume sonore à la fois dans la pièce 21 et dans la pièce 22. La réduction du bruit dans les deux pièces 21 et 22 est le fait d'une absorption efficace d'une grande partie de l'énergie des ondes sonores par les dispositifs 4. On a constaté que cette absorption s'effectue aussi bien dans les basses fréquences que dans les moyennes et hautes fréquences, ce qu'illustrent une comparaison des courbes de la figure 5A et une comparaison des courbes de la figure 5B.It is apparent from the contents of this table that the devices 4 reduce the sound volume both in the room 21 and in the room 22. The noise reduction in the two rooms 21 and 22 is the result of an effective absorption of a room. much of the energy of the sound waves by the devices 4. It has been found that this absorption is effected as well in the low frequencies as in the medium and high frequencies, which is illustrated by a comparison of the curves of the Figure 5A and a comparison of the curves of the Figure 5B .

Sur la figure 5A, la courbe A21 a été tracée à partir des mesures du niveau sonore dans la pièce 21 équipée des quatre dispositifs 4 disposés selon la configuration de la figure 5, tandis que la courbe S21 a été tracée à partir des mesures du niveau sonore dans cette même pièce 21 en l'absence des dispositifs 4 ou de tout autre panneau acoustique. Sur la figure 5B, la courbe A22 a été tracée à partir des mesures du niveau sonore dans la pièce 22 en présence des quatre dispositifs 4 disposés dans la pièce 21, selon la configuration de la figure 5, tandis que la courbe S22 a été tracée à partir des mesures du niveau sonore dans cette même pièce 22 en l'absence des dispositifs 4 ou de tout autre panneau acoustique dans la pièce 21. Bien entendu, la source sonore 24 produisait le même son lorsque les mesures utilisées pour tracer les courbes A21 et A22 ont été effectuées simultanément et lorsque les mesures utilisées pour tracer les courbes S21 et S22 ont été effectuées simultanément.On the Figure 5A , the curve A21 was plotted from the measurements of the sound level in the part 21 equipped with the four devices 4 arranged according to the configuration of the figure 5 , while the curve S21 has been drawn from the measurements of the sound level in the same room 21 in the absence of the devices 4 or any other acoustic panel. On the Figure 5B , the curve A22 was plotted from the measurements of the sound level in the room 22 in the presence of the four devices 4 arranged in the room 21, according to the configuration of the figure 5 while the curve S22 has been drawn from the measurements of the sound level in the same room 22 in the absence of the devices 4 or any other acoustic panel in the room 21. Of course, the sound source 24 produced the same sound when the measurements used to draw the curves A21 and A22 were carried out simultaneously and when the measurements used to draw the curves S21 and S22 were carried out simultaneously.

Par ailleurs, une comparaison des temps de réverbération obtenus dans les différentes configurations testées et une comparaison des indices de clarté obtenus dans ces mêmes configurations montrent que la présence des dispositifs 4 s'accompagne également de gains indéniables en termes d'acoustique perçue.Moreover, a comparison of the reverberation times obtained in the different configurations tested and a comparison of the clarity indices obtained in these same configurations show that the presence of the devices 4 is also accompanied by undeniable gains in terms of perceived acoustics.

En outre, le taux d'ondes stationnaires dans la pièce 21 a été réduite en présence des dispositifs 4, ce qui se traduit par une augmentation de l'homogénéité du champ acoustique, cette homogénéité étant importante notamment dans le cas d'une écoute musicale.In addition, the stationary wave rate in the part 21 has been reduced in the presence of the devices 4, which results in an increase in the homogeneity of the acoustic field, this homogeneity being important especially in the case of a musical listening .

Il convient de noter que les performances évoquées ci-dessus ont été obtenues alors que l'équipement de la pièce 21 en dispositifs 4 est très partiel. On peut donc s'attendre à des performances encore plus élevées dans le cas d'un plus grand nombre de dispositifs 4 installés dans la pièce 21, notamment devant la cloison 23.It should be noted that the performance mentioned above was obtained while the equipment of the piece 21 in devices 4 is very partial. We can therefore expect even higher performance in the case of a larger number of devices 4 installed in the room 21, especially in front of the partition 23.

Sur la figure 6, est représenté un autre dispositif 104 de réduction de pollutions sonores. Dans ce qui suit, on ne décrit que ce qui le distingue du dispositif 4. En outre, une référence utilisée ci-après pour désigner une partie du dispositif 104 semblable ou équivalente à une partie référencée du dispositif 4 est construite en ajoutant 100 à la référence désignant cette partie dans le dispositif 4.On the figure 6 , there is shown another device 104 for reducing noise pollution. In what follows, only what distinguishes it from the device 4 is described. In addition, a reference used hereafter to designate a part of the device 104 similar or equivalent to a referenced part of the device 4 is constructed by adding 100 to the device. reference designating this part in the device 4.

Le panneau acoustique 101 est un panneau sandwich comportant deux couches 113, qui peuvent être faites de ouate ou d'un autre matériau et entre lesquelles se trouve la couche de composite à fibres de verre 112. Ce panneau 101 est monté par l'intermédiaire de deux paires d'organes 103, dans une ouverture 30 délimitée par un support en forme de cadre 102. Le cadre 102 comprend deux montants dont chacun porte une paire d'organes 103 disposés le long d'un bord latéral du panneau 101.The acoustic panel 101 is a sandwich panel having two layers 113, which may be made of wadding or other material and between which is the layer of fiberglass composite 112. This panel 101 is mounted via two pairs of members 103, in an opening 30 delimited by a frame-shaped support 102. The frame 102 comprises two uprights each of which carries a pair of members 103 arranged along a lateral edge of the panel 101.

La patte 107 de chaque organe 103 comporte un couple de coudes inversés 31 et 32 qui décalent un crochet 108 vers l'intérieur, par rapport au ressort 106 faisant partie du même organe 103 que ce crochet 108. A cet égard, on notera que les deux organes 103 d'un même côté du panneau 101 diffèrent l'un de l'autre en ce que les coudes 31 et 32 de l'un sont inversés par rapport aux coudes 31 et 32 de l'autre.The tab 107 of each member 103 comprises a pair of inverted bends 31 and 32 which offset a hook 108 inwardly relative to the spring 106 forming part of the same member 103 as the hook 108. In this respect, it should be noted that the two members 103 on the same side of the panel 101 differ from each other in that the elbows 31 and 32 of one are reversed relative to the elbows 31 and 32 of the other.

Ainsi qu'on peut le voir à la figure 7, les pattes 105 et 107 d'un même organe 103 ne sont pas décalées angulairement l'une de l'autre. Chaque patte 107 comporte un autre couple de coudes inversés 33 et 34, qui s'incurvent dans le plan de la figure 7 et grâce auxquels le crochet 108 d'un organe 103 se trouve dans le prolongement de la patte 105 de cet organe 103.As can be seen at figure 7 , the tabs 105 and 107 of the same member 103 are not angularly offset from one another. Each tab 107 comprises another pair of inverted elbows 33 and 34, which curve in the plane of the figure 7 and thanks to which the hook 108 of an organ 103 is in the extension of the tab 105 of this member 103.

Sur la figure 8 est représentée une salle dans laquelle sont installées plusieurs rangées horizontales et attenantes de dispositifs 204 de réduction de pollutions sonores. Ces dispositifs 204 sont portés par un mur 202 de la salle. Semblables entre eux, ils sont selon un troisième mode de réalisation de l'invention. Dans ce qui suit, on ne décrit que ce qui les distingue d'un dispositif 4. En outre, une référence utilisée pour désigner une partie d'un dispositif 204 semblable ou équivalente à une partie référencée du dispositif 4 est construite en ajoutant deux cents à la référence repérant cette partie dans le dispositif 4.On the figure 8 is represented a room in which are installed several horizontal rows and adjoining devices 204 for reducing noise pollution. These devices 204 are carried by a wall 202 of the room. Similar to each other, they are according to a third embodiment of the invention. In what follows, only what distinguishes them from a device 4 is described. In addition, a reference used to designate a part of a device 204 similar or equivalent to a referenced part of the device 4 is constructed by adding two hundred to the reference identifying this part in the device 4.

Ainsi qu'on peut le voir à la figure 9, le panneau 201 d'un dispositif 204 est une pièce d'un seul tenant, qui est moulée par compression et dont le matériau sensiblement homogène est un agglomérat de fibres, telles que des fibres de verre, unies par un liant polymérique. Sur toute la longueur de sa périphérie, le panneau 201 comporte un rebord 250 qui le rigidifie et qui est dirigé vers l'arrière.As can be seen at figure 9 , the panel 201 of a device 204 is an integral piece, which is compression molded and whose substantially homogeneous material is an agglomerate of fibers, such as glass fibers, united by a polymeric binder. Over the entire length of its periphery, the panel 201 comprises a flange 250 which stiffens it and which is directed towards the rear.

Chaque panneau 201 est monté sur le mur 202 par l'intermédiaire de quatre systèmes de montage, qui sont répartis à ses quatre angles. Ainsi qu'on peut le voir aux figures 10 et 12, chacun de ces systèmes de montage 251A et 251B comporte une embase métallique 252A ou 252B fixée au mur 202 par une vis 211, ainsi qu'au moins un organe de support 203 immobilisé sur cette embase par une clé de verrouillage 253. Les embases métalliques des systèmes de montage 251A ou 251B sont de deux types. Une embase de l'un de ces deux types est référencée 252A à la figure 10. Une embase de l'autre type est référencée 252B à la figure 12.Each panel 201 is mounted on the wall 202 by means of four mounting systems, which are distributed at its four corners. As can be seen at figures 10 and 12 , each of these mounting systems 251A and 251B comprises a metal base 252A or 252B fixed to the wall 202 by a screw 211, as well as at least one support member 203 immobilized on this base by a locking key 253. The metal bases 251A or 251B mounting systems are of two types. A base of one of these two types is referenced 252A at the figure 10 . A base of the other type is referenced 252B at the figure 12 .

Ainsi qu'on peut le voir à la figure 10, chaque embase 252A comporte une seule branche 254, qui relie rigidement un anneau de fixation 255 à une portion 256 de montage d'un organe 203. L'anneau 255 est prévu pour la fixation de l'embase 252A par serrage contre le mur 202, au moyen d'une vis 21 dont la tige passe dans cet anneau. La portion 256 présente la forme d'un renflement et comporte des moyens de verrouillage grâce auxquels une clé 253 pourvus de moyens complémentaires peut être immobilisée dans une position de retenue d'un organe 203. Ces moyens de verrouillage, connus en eux-mêmes, sont masqués par la clé 253 à la figure 10. Par exemple, ils peuvent être du type rampe hélicoïdale.As can be seen at figure 10 each base 252A comprises a single branch 254, which rigidly connects a fixing ring 255 to a mounting portion 256 of a member 203. The ring 255 is provided for fixing the base 252A by clamping against the wall 202, by means of a screw 21 whose rod passes in this ring. The portion 256 has the shape of a bulge and comprises locking means by means of which a key 253 provided with complementary means can be immobilized in a position of retention of a member 203. These locking means, known in themselves, are hidden by key 253 at the figure 10 . For example, they may be of the helical ramp type.

Un organe 203 est représenté seul à la figure 11. Sa portion 209 est un anneau ouvert latéralement, qui ne s'étend que sur un demi-tour. Elle se prolonge par une boucle de sécurité 260 qui entoure la patte 207 de manière à en limiter le débattement angulaire et qui forme donc une butée pour cette patte 207. En particulier, la boucle 260 empêche que la patte 207 puisse être basculée d'une quantité trop importante vers l'avant, c'est-à-dire dans le sens de la flèche B', ce qui pourrait conduire à une détérioration de l'organe 203, par exemple dans le cas d'une traction trop importante sur un panneau 201 du fait d'un geste maladroit ou d'un accrochage accidentel de ce panneau par une personne ou un objet en mouvement.A member 203 is shown alone at the figure 11 . Its portion 209 is a laterally open ring, which extends only half a turn. It is extended by a safety loop 260 which surrounds the tab 207 so as to limit the angular displacement and which therefore forms a stop for this leg 207. In particular, the loop 260 prevents the tab 207 can be tilted by a excessive amount forward, that is to say in the direction of the arrow B ', which could lead to a deterioration of the member 203, for example in the case of too much traction on a panel 201 due to an awkward gesture or accidental attachment of this panel by a person or a moving object.

Un coude 261 sensiblement à angle droit relie la patte 207 au crochet 208, grâce à quoi ce crochet 208 est basculé d'un quart de tour par rapport à la patte 207, de manière à être en saillie vers l'avant et à pouvoir de ce fait être inséré dans un clip de retenue 262 rigidement associé au rebord 250 d'un panneau 201. Chaque panneau 201 possède quatre clips 262, dans lesquels quatre crochets 208 s'insèrent lors du montage de ce panneau, de manière à y être ensuite retenus.An elbow 261 substantially at right angles connects the tab 207 to the hook 208, whereby this hook 208 is tilted a quarter of a turn relative to the tab 207, so as to project forwardly and to be able to this fact be inserted into a retaining clip 262 rigidly associated with the flange 250 of a panel 201. Each panel 201 has four clips 262, in which four hooks 208 are inserted during the assembly of this panel, so as to be thereafter retained.

Chaque embase 252A fait partie de l'un de plusieurs systèmes de montage 251A, qui se trouvent aux extrémités gauche et droite des rangées de panneaux 201. Chaque système de montage 251B est placé au niveau d'une fente de séparation entre deux panneaux 201 consécutifs.Each base 252A is part of one of several mounting systems 251A, which are at the left and right ends of the panel rows 201. Each mounting system 251B is placed at a separation slot between two consecutive panels 201 .

Sur la figure 12 est représenté un tel système de montage 251B, qui participe au support de deux panneaux 201 consécutifs et attenants d'une même rangée horizontale de panneaux 201. A cet effet, son embase 252B porte deux organes 203, dont chacun supporte en partie l'un de ces deux panneaux 201. Cette embase 252B comporte deux portions de montage 256 et deux branches 254, dont chacune relie un unique anneau 255 à l'une de ces deux portions 256. Dans chaque portion de montage 256, la demi-boucle 209 de l'un des deux organes 203 est fixée rigidement par une clé 253.On the figure 12 is represented such a mounting system 251B, which participates in the support of two consecutive and adjacent panels 201 of the same horizontal row of panels 201. For this purpose, its base 252B carries two members 203, each of which partially supports one of these two panels 201. This base 252B comprises two mounting portions 256 and two branches 254, each of which connects a single ring 255 to one of these two portions 256. In each mounting portion 256, the half-loop 209 of one of the two members 203 is fixed rigidly by a key 253.

Une seule action, simple à effectuer, mène au verrouillage d'une clé 253 dans sa position de retenue d'un organe 203, après qu'une tête de cette clé a été insérée dans une portion de montage 256. Cette action consiste à faire pivoter d'un quart de tour la clé 253, ce qu'illustre la flèche A à la figure 13.A single action, simple to perform, leads to the locking of a key 253 in its retaining position of a member 203, after a head of this key has been inserted into a mounting portion 256. This action consists in making turn key 253 a quarter of a turn, as illustrated by arrow A at figure 13 .

Bien que elles soient avantageuses en termes de facilité de montage, les clés 253 peuvent être remplacées pas des vis traditionnelles, moyennant une adaptation en conséquence des portions 256.Although they are advantageous in terms of ease of assembly, the keys 253 can be replaced by traditional screws, with a corresponding adaptation of the portions 256.

L'invention ne se limite pas aux modes de réalisation décrits précédemment. En particulier, le nombre d'organes 3 ou 103 dans un dispositif 4 ou 104 peut être différent de ceux mentionnés précédemment.The invention is not limited to the embodiments described above. In particular, the number of members 3 or 103 in a device 4 or 104 may be different from those mentioned above.

Par ailleurs, la patte 5 ou 105 d'un organe 3 ou 103 peut être fixée au panneau acoustique 1 ou 101, auquel cas le crochet 8 ou 108 de cet organe est accroché à un axe fixé au support 2 ou 102.Furthermore, the lug 5 or 105 of a member 3 or 103 may be fixed to the acoustic panel 1 or 101, in which case the hook 8 or 108 of this member is hooked to an axis fixed to the support 2 or 102.

En outre, la patte 7 ou 107 peut former la portion ressort de l'organe 3 ou 103 ou, à tout le moins, en faire partie, en pouvant être courbée de manière élastique.In addition, the tab 7 or 107 may form the spring portion of the member 3 or 103 or, at least, be part thereof, being able to be bent elastically.

Egalement, les organes 3 peuvent ne pas être réalisés dans un fil métallique. Par exemple, ils peuvent être réalisés en polymère, par injection, auquel cas ils peuvent être d'un seul tenant avec une partie du panneau acoustique.Also, the members 3 may not be made of a wire. For example, they can be made of polymer, by injection, in which case they can be in one piece with a part of the acoustic panel.

De plus, le panneau acoustique 1 ou 101 peut ne comporter qu'une seule couche 12 ou 13 ou 112 ou 113. Il peut également en posséder plus de trois.In addition, the acoustic panel 1 or 101 may have only one layer 12 or 13 or 112 or 113. It can also have more than three.

Claims (16)

  1. Device for reducing noise pollution, comprising an acoustic panel (1; 101; 201) and at least one member (3; 103; 203) for elastically holding this panel (1; 101; 201), this holding member (3; 103; 203) comprising first and second mounting means (8; 108; 208) for installing the same between a support (2; 102; 202) and the acoustic panel (1; 101; 201) and a spring portion (6; 106) provided between the first and second mounting means, characterized in that said holding member (3; 103; 203) comprises a tab (7; 107; 207) having one end (7A) connected to the second mounting means (5; 105; 209) and bearing, at a distance from said end (7A), the first mounting means (8; 108; 208) so that a movement (D) of the acoustic panel (1; 101; 201) perpendicularly to the main faces (14A, 14B) thereof is permitted by an elastic deformation of the spring portion (6; 106) in the tilting direction (B) of tab (7; 107; 207) relative to the second mounting means (5; 105; 209).
  2. Device as claimed in claim 1, characterized in that the spring portion comprises a coil spring (6 ; 106) which links tab (7 ; 107 ; 207) to second mounting means (5 ; 105 ; 209).
  3. Device as claimed in claim 2, characterized in that spring (6; 106) comprises several non-adjacent turns.
  4. Device as claimed in either of claims 2 and 3, characterized in that said tab (7 ; 107 ; 207) is substantially orthogonal to an axis (X1-X'1) of spring (6 ; 106).
  5. Device as claimed in any of claims 2 to 4, characterized in that said holding member (3; 103; 203) comprises a metal wire shaped to comprise at least two portions which extend jointly, namely one portion which forms said spring (6; 106) and one portion which forms said tab (7; 107; 207).
  6. Device as claimed in claim 5, characterized in that the metal wire of holding member (203) comprises a portion (260) which limits said tilting of tab (207) in at least one direction by forming a limit stop for that tab.
  7. Device as claimed in any of the above claims, characterized in that said first mounting means (8 ; 108 ; 208, 262) are provided to form a link which allows swiveling around a swivel axis (X2-X'2) which is substantially parallel to acoustic panel (1 ; 101 ; 201).
  8. Device as claimed in claim 7, characterized in that said first mounting means comprise a hook (8; 108) curved around said swivel axis (X2-X'2).
  9. Device as claimed in either of claims 7 and 8, characterized in that said second mounting means (7; 107; 207) are provided to form a link which makes it impossible for the holding member (3; 103; 203) to tilt around an axis which is parallel to said swivel axis (X2-X'2).
  10. Device as claimed in claim 9, characterized in that said second mounting means comprise a rigid loop (9; 209) which delimits a space (10) through which an element for clamping that loop against a surface can pass.
  11. Equipment comprising a support (2; 102; 202), characterized in that it comprises a device (4; 104; 204) which is in accordance with any of the above claims and the acoustic panel (1; 101; 201) whereof is mounted on support (2; 102; 202) so that it is substantially vertical by means, in particular, of at least one example of holding member (3; 103; 203).
  12. Equipment as claimed in claim 11, characterized in that main face (14A) of acoustic panel (1; 201) faces towards wall (2; 202) of the support and is separated from this wall (2; 202) by an air gap (15).
  13. Equipment as claimed in either of claims 11 and 12, characterized in that said first mounting means (8 ; 108 ; 208) are located at a lower end of said tab (7 ; 107 ; 207) so that this tab (7 ; 107 ; 207) is essentially longitudinally stressed by the weight of acoustic panel (1 ; 101 ; 201).
  14. Equipment as claimed in claim 13, characterized in that device (4 ; 104 ; 204) for reducing noise pollution is in accordance with any of claims 2 to 5, said spring comprising an axis (X1-X'1) which is substantially horizontal.
  15. Equipment as claimed in any of claims 11 to 14, characterized in that device (4; 104; 204) for reducing noise pollution is in accordance with any of claims 2 to 5 and in that said elastic deformation allowing movement (D) of acoustic panel (1; 101; 201) perpendicularly to its main faces (14A, 14B) takes place in the direction of rotation of the first and second ends of spring (6; 106) relative to each other around axis (X1-X'1) of that spring.
  16. Equipment as claimed in any of claims 11 to 15, characterized in that movement (V) of acoustic panel (1; 101; 201) parallel to its main faces (14A, 14B) is allowed by elastic deformation of spring portion (6; 106) in the tilting direction (F2) of tab (7; 107; 207) relative to second mounting means (5; 105; 209).
EP08806183A 2007-08-02 2008-07-07 Device for reducing noise pollution and equipment including such device Active EP2198096B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0705648A FR2919637B1 (en) 2007-08-02 2007-08-02 DEVICE FOR REDUCING SOUND POLLUTION AND INSTALLATION COMPRISING SAID DEVICE
PCT/FR2008/051271 WO2009019363A2 (en) 2007-08-02 2008-07-07 Device for reducing noise pollution and equipment including such device

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EP2198096A2 EP2198096A2 (en) 2010-06-23
EP2198096B1 true EP2198096B1 (en) 2011-10-12

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EP (1) EP2198096B1 (en)
AT (1) ATE528452T1 (en)
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FR2966855B1 (en) * 2010-11-02 2013-09-27 Actuel Ebenisterie Realisations DEVICE FOR SUSPENDING AN ACOUSTIC PROCESSING ELEMENT
CN107103898A (en) * 2011-10-06 2017-08-29 Hrl实验室有限责任公司 High bandwidth anti-resonance vibration film
US9388572B2 (en) * 2013-04-12 2016-07-12 G2 Group, LLC System for sound isolation
CA2931869C (en) 2015-06-03 2023-10-17 Epic Metals Corporation Tunable specular acoustic deck
US9988137B2 (en) * 2016-03-29 2018-06-05 The Boeing Company Methods and apparatus for forming and installing insulation blankets in a vehicle compartment

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US2177393A (en) * 1937-06-08 1939-10-24 Johns Manville Sound absorbing structure
US3350831A (en) * 1965-07-01 1967-11-07 Peter H Miller Mounting device with flexible tab for wallboard
US3816225A (en) * 1972-07-26 1974-06-11 O Eckel Acoustical panel assembly and method of forming it
US5540027A (en) * 1992-12-29 1996-07-30 The Reinforced Earth Company Spring biased apparatus for maintaining precast panels in a stable removable position in a vertical slot
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US6267347B1 (en) * 1999-10-05 2001-07-31 Peter Anthony Ryan Acoustic mount
FR2836497B1 (en) * 2002-02-22 2004-11-05 Virtual Travel DEVICE FOR FIXING AN ACOUSTIC PANEL ON A WALL
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FR2919637A1 (en) 2009-02-06
EP2198096A2 (en) 2010-06-23
ATE528452T1 (en) 2011-10-15
WO2009019363A3 (en) 2009-08-13
FR2919637B1 (en) 2009-10-02
US8162104B2 (en) 2012-04-24
WO2009019363A2 (en) 2009-02-12
US20110226546A1 (en) 2011-09-22

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