FR2847919A1 - Double wall acoustic panel for absorbing includes spacing elements between absorber material and first of two acoustic walls, to create curtain of air between absorber and first wall - Google Patents

Double wall acoustic panel for absorbing includes spacing elements between absorber material and first of two acoustic walls, to create curtain of air between absorber and first wall Download PDF

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Publication number
FR2847919A1
FR2847919A1 FR0215119A FR0215119A FR2847919A1 FR 2847919 A1 FR2847919 A1 FR 2847919A1 FR 0215119 A FR0215119 A FR 0215119A FR 0215119 A FR0215119 A FR 0215119A FR 2847919 A1 FR2847919 A1 FR 2847919A1
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France
Prior art keywords
acoustic
wall
absorbent
acoustic panel
panel according
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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
Application number
FR0215119A
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French (fr)
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FR2847919B1 (en
Inventor
Michel Pompei
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.)
Hutchinson SA
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Hutchinson SA
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority to FR0215119A priority Critical patent/FR2847919B1/en
Application filed by Hutchinson SA filed Critical Hutchinson SA
Priority to US10/537,036 priority patent/US20060124388A1/en
Priority to ES03789519T priority patent/ES2279214T3/en
Priority to EP03789519A priority patent/EP1570139B1/en
Priority to PCT/FR2003/003513 priority patent/WO2004053246A1/en
Priority to AT03789519T priority patent/ATE348226T1/en
Priority to DE60310451T priority patent/DE60310451T2/en
Publication of FR2847919A1 publication Critical patent/FR2847919A1/en
Application granted granted Critical
Publication of FR2847919B1 publication Critical patent/FR2847919B1/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Classifications

    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04BGENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/62Insulation or other protection; Elements or use of specified material therefor
    • E04B1/74Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls
    • E04B1/82Heat, 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
    • E04B1/84Sound-absorbing elements
    • E04B1/86Sound-absorbing elements slab-shaped
    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04BGENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/62Insulation or other protection; Elements or use of specified material therefor
    • E04B1/74Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls
    • E04B1/88Insulating elements for both heat and sound
    • E04B1/90Insulating elements for both heat and sound slab-shaped
    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04BGENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/62Insulation or other protection; Elements or use of specified material therefor
    • E04B1/74Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls
    • E04B1/82Heat, 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
    • E04B1/84Sound-absorbing elements
    • E04B2001/8457Solid slabs or blocks
    • E04B2001/8461Solid slabs or blocks layered
    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04BGENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/62Insulation or other protection; Elements or use of specified material therefor
    • E04B1/74Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls
    • E04B1/82Heat, 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
    • E04B1/84Sound-absorbing elements
    • E04B2001/8457Solid slabs or blocks
    • E04B2001/8476Solid slabs or blocks with acoustical cavities, with or without acoustical filling

Abstract

The acoustic panel includes two walls (1,2) between which an acoustic absorber (3), such as glass wool, is disposed. The glass wool may be contained in a fine envelope e.g. formed from Mylar (RTM) material. Spacing elements (5) are disposed between the first wall and the absorber, so as to create a curtain of air between the absorber and the first wall.

Description

PANNEAU ACOUSTIQUE A DOUBLE PAROIDOUBLE WALL ACOUSTIC PANEL

La présente invention a pour objet un panneau acoustique à deux parois entre lesquelles est disposé un absorbant acoustique.  The present invention relates to an acoustic panel with two walls between which is arranged an acoustic absorbent.

Dans un tel panneau, on peut améliorer l'efficacité de 5 l'absorbant en créant une lame d'air entre l'absorbant acoustique et la paroi qui reçoit l'excitation acoustique.  In such a panel, the efficiency of the absorbent can be improved by creating an air space between the acoustic absorbent and the wall which receives the acoustic excitation.

La présente invention concerne un panneau acoustique du type précité dont la structure permet de créer avantageusement cette lame d'air. 1o L'invention concerne ainsi un panneau acoustique comprenant une première et une deuxième paroi entre lesquelles est disposé un absorbant acoustique caractérisé en ce que, entre l'absorbant et la première paroi, sont disposés des éléments d'écartement répartis selon au moins une dimension et créant une lame d'air entre l'absorbant et la première 1 5 paroi.  The present invention relates to an acoustic panel of the aforementioned type, the structure of which makes it possible to advantageously create this air space. 1o The invention thus relates to an acoustic panel comprising a first and a second wall between which is disposed an acoustic absorbent characterized in that, between the absorbent and the first wall, are arranged spacer elements distributed along at least one dimension and creating an air space between the absorbent and the first wall.

Plus particulièrement, les éléments d'écartement, peuvent former un réseau à deux dimensions par exemple une grille ou un nid d'abeille ou un gaufrage ou bien encore des picots répartis selon ces deux dimensions.  More particularly, the spacing elements can form a two-dimensional network, for example a grid or a honeycomb or an embossing, or even pins distributed along these two dimensions.

La grille, le nid d'abeille ou le gaufrage peut constituer un filet 20 ou un sac à l'intérieur duquel est placé l'absorbant acoustique. Le sac peut être gaufré au moins sur une face tournée vers la première paroi. En particulier, le filet ou le sac peut être en un matériau thermiquement conducteur de sorte qu'il constitue un drain thermique entre lesdites parois.  The grid, the honeycomb or the embossing can constitute a net 20 or a bag inside which the acoustic absorbent is placed. The bag can be embossed at least on one side facing the first wall. In particular, the net or the bag may be made of a thermally conductive material so that it constitutes a heat sink between said walls.

Un film autocollant portant ledit réseau (par exemple grille, nid 25 d'abeille, gaufrage et/ou picots) peut être collé soit sur la première paroi, soit sur l'absorbant acoustique, notamment sur un emballage de l'absorbant acoustique. Selon une variante préférée, la première paroi présente, sur une face interne dirigée vers l'absorbant acoustique, une contreplaque en un 30 matériau viscoélastique et un revêtement comportant lesdits éléments d'écartement (par exemple stries parallèles, nids d'abeille, gaufrage, et/ou picots). D'autres caractéristiques et avantages de l'invention apparaîtront mieux à la lecture de la description ci-après, donnée à titre 35 d'exemple non limitatif, en liaison avec les dessins dans lesquels: - la figure 1 représente en vue éclatée un mode de réalisation de l'invention; - les figures 2A et 2B illustrent les conditions de mise en oeuvre de l'invention; - les figures 3 à 8 illustrent des variantes de l'invention; - les figures 9 à 12 sont des variantes de l'invention avec mise en oeuvre d'un matériau viscoélastique.  A self-adhesive film carrying said network (for example grid, honeycomb, embossing and / or spikes) can be bonded either to the first wall or to the acoustic absorbent, in particular on a packaging of the acoustic absorbent. According to a preferred variant, the first wall has, on an internal face directed towards the acoustic absorbent, a plywood of a viscoelastic material and a covering comprising said spacing elements (for example parallel ridges, honeycombs, embossing, and / or spikes). Other characteristics and advantages of the invention will appear better on reading the description below, given by way of nonlimiting example, in conjunction with the drawings in which: - Figure 1 shows in exploded view a mode of carrying out the invention; - Figures 2A and 2B illustrate the conditions for implementing the invention; - Figures 3 to 8 illustrate variants of the invention; - Figures 9 to 12 are variants of the invention with the use of a viscoelastic material.

A la figure 1, le panneau acoustique présente une première paroi 1 qui reçoit l'excitation acoustique (flèche F) lorsque le panneau est mis io en place, une deuxième paroi 2 et un absorbant acoustique 3, par exemple de la laine de verre qui peut être contenue dans une fine enveloppe 4 en " Mylar " (Marque déposée de du Pont).  In FIG. 1, the acoustic panel has a first wall 1 which receives the acoustic excitation (arrow F) when the panel is put in place, a second wall 2 and an acoustic absorbent 3, for example glass wool which can be contained in a thin envelope 4 in "Mylar" (Registered trademark of du Pont).

La lame d'air est réalisée à l'aide d'un écarteur mécanique constitué par un grillage 5.  The air gap is produced using a mechanical spacer constituted by a mesh 5.

La forme de la maille peut être quelconque, par contre sa taille doit être telle que sous l'action des pressions que subit l'absorbant, celuici ne doit pas dépasser la surface définie par la maille afin qu'il ne puisse pas venir en contact avec la paroi 1 et que la lame d'air garde l'épaisseur souhaitée. La figure 2A illustre le cas o, avec la pression de montage, 20 l'absorbant ne vient pas en contact avec la paroi 1, la figure 2B illustrant le cas défavorable d'un dépassement au-delà de la grille 5.  The shape of the mesh can be any, on the other hand its size must be such that under the action of the pressures which the absorbent undergoes, this must not exceed the surface defined by the mesh so that it cannot come into contact with wall 1 and that the air space keeps the desired thickness. FIG. 2A illustrates the case where, with the mounting pressure, the absorbent does not come into contact with the wall 1, FIG. 2B illustrating the unfavorable case of an overshoot beyond the grid 5.

La nature du matériau constituant le grillage est choisie en fonction des contraintes d'environnement de l'application envisagée. Ce matériau peut être malléable pour permettre au grillage d'épouser des formes 25 compliquées, à condition qu'au cours de la déformation et sous les pressions de montage ou d'utilisation l'absorbant ne puisse pas venir en contact avec la paroi.  The nature of the material constituting the mesh is chosen according to the environmental constraints of the envisaged application. This material can be malleable to allow the mesh to conform to complicated shapes, provided that during deformation and under mounting or use pressures the absorbent cannot come into contact with the wall.

ExempleExample

L'absorbant 3 est de la laine de verre de faible densité 30 contenue dans une fine enveloppe en " Mylar " (Marque déposée). L'écarteur est un grillage en fil d'acier inoxydable de 0,5 mm de diamètre et dont la maille est un carré de 10 mm de côté. La réduction de la transparence est de l'ordre de 3 à 4 dB.  The absorbent 3 is low density glass wool 30 contained in a thin "Mylar" envelope (registered trademark). The spacer is a mesh of stainless steel wire 0.5 mm in diameter and whose mesh is a square of 10 mm side. The reduction in transparency is of the order of 3 to 4 dB.

Le grillage 5, par exemple carré (figure 3), peut être remplacé 35 par un nid d'abeille 6 (figure 4) de dimension convenable. Une maille trop petite conduit à une grande surface de liaison entre la paroi excitatrice 1 et l'absorbant 3, ce qui diminue la performance.  The grid 5, for example square (FIG. 3), can be replaced by a honeycomb 6 (FIG. 4) of suitable size. Too small a mesh leads to a large connecting surface between the excitation wall 1 and the absorbent 3, which decreases the performance.

On peut substituer au grillage des picots 8 (figure 5) régulièrement répartis sur la surface interne 11 de la paroi 1 soumise à 5 l'excitation. Ceci peut se faire à l'aide d'un film auto collant 9 sur lequel ces picots sont déjà collés. Alternativement, ce film 9 peut être tout aussi bien collé sur l'absorbant 3 ou son emballage 4 comme il en existe pour certaines laines de verre.  It is possible to replace the grid with pins 8 (FIG. 5) regularly distributed over the internal surface 11 of the wall 1 subjected to the excitation. This can be done using a self-adhesive film 9 on which these pins are already bonded. Alternatively, this film 9 can be just as well bonded to the absorbent 3 or its packaging 4 as there are for certain glass wools.

Il faut toutefois veiller à éviter le poinçonnement de 10 l'absorbant qui favoriserait alors son contact avec la paroi 1 recevant l'excitation. Le grillage 5 peut constituer un filet 7 dans lequel est placé l'absorbant 3 (figure 6).  However, care must be taken to avoid puncturing of the absorbent which would then favor its contact with the wall 1 receiving the excitation. The mesh 5 can constitute a net 7 in which the absorbent 3 is placed (FIG. 6).

Dans certaines applications ce filet 7 peut constituer un drain 15 thermique qui permet d'évacuer de la chaleur d'une paroi vers l'autre alors que l'absorbant constitue en général un bon isolant thermique. Il suffit de fabriquer le filet 7 avec un matériau bon conducteur de la chaleur par exemple cuivre, aluminium. On peut en augmenter la performance thermique en substituant au fil des lames 5' (figure 7) de façon à avoir une surface de 20 contact plus importante sans toutefois trop amoindrir l'effet acoustique recherché. Les parois périphériques sont constituées par la surface latérale du parallélépipède ainsi formé dans lequel est emprisonné l'absorbant. L'épaisseur étant faible, le flanc est raide quand il est en grillage 25 ou en un matériau ridige, le filet devenant alors une cage. Il constitue dans ce cas une bonne voie de passage solidienne des vibrations et du bruit.  In certain applications, this net 7 can constitute a heat sink 15 which allows heat to be removed from one wall to the other while the absorbent generally constitutes a good thermal insulator. It suffices to manufacture the net 7 with a material which is a good conductor of heat, for example copper, aluminum. It is possible to increase the thermal performance by substituting the wire for the blades 5 ′ (FIG. 7) so as to have a larger contact surface without however greatly reducing the desired acoustic effect. The peripheral walls are formed by the lateral surface of the parallelepiped thus formed in which the absorbent is trapped. The thickness being small, the side is stiff when it is made of mesh 25 or of a ridge material, the net then becoming a cage. In this case, it constitutes a good solid-state passageway for vibrations and noise.

Les parois périphériques (notées, a b c d et e f g h à la figure 6) peuvent constituer une voie de passage solidienne si le matériau utilisé pour le filet est de fort module; dans ce cas on limitera cette transmission en 30 ayant de grandes surfaces d'un seul tenant, pour limiter l'effet de ces parois périphériques. On peut substituer au filet 7 un sac 12 dont la surface extérieure 14 est gaufrée en 15 (figure 8) de façon à limiter la surface de contact avec la paroi excitatrice 1. La hauteur des renforts gaufrés 15 est 35 déterminée pour éviter un contact de la face externe 14 avec la face interne 11 de la paroi 1 quant le sac contenant l'absorbant est monté avec une compression. Selon une autre mise en oeuvre de l'invention, la plaque 1 présente sur sa face interne une plaque en matériau viscoélastique 17 (par 5 exemple le matériau "deltane" de la Société PAULSTRA et une contre-plaque 17' servant à amortir les vibrations de la plaque 1 soumise à l'excitation. Dans ce cas, la contre-plaque 17' est gaufrée. Cette configuration permet d'alléger la contreplaque 17' en diminuant son épaisseur tout en maintenant sa raideur à l'aide de l'inertie des parois 18 perpendiculaires à sa surface. Ces dernières io servent d'écarteur pour éviter le contact de l'absorbant avec la contre-plaque (figure 9).  The peripheral walls (noted, a b c d and e f g h in FIG. 6) can constitute a solid passageway if the material used for the net is of high modulus; in this case, this transmission will be limited by having large areas in one piece, to limit the effect of these peripheral walls. A bag 12 can be substituted for the net 7, the outer surface 14 of which is embossed at 15 (FIG. 8) so as to limit the contact surface with the excitation wall 1. The height of the embossed reinforcements 15 is determined to avoid contact of the outer face 14 with the inner face 11 of the wall 1 when the bag containing the absorbent is mounted with compression. According to another implementation of the invention, the plate 1 has on its internal face a plate of viscoelastic material 17 (for example the "deltane" material from the company PAULSTRA and a counter plate 17 'used to dampen vibrations of the plate 1 subjected to excitation. In this case, the counter plate 17 'is embossed. This configuration makes it possible to lighten the counter plate 17' by reducing its thickness while maintaining its stiffness by means of inertia. walls 18 perpendicular to its surface, which serve as spacers to avoid contact of the absorbent with the counterplate (FIG. 9).

Dans les modes de réalisation des figures 9 à 11, la contreplaque 17' peut présenter une plaque collée 20 portant des stries 18 à une ou deux dimensions.  In the embodiments of FIGS. 9 to 11, the counterplate 17 ′ may have a bonded plate 20 carrying grooves 18 in one or two dimensions.

A la figure 10, les écarteurs 18 sont des nervures ménagées selon une seule dimension et espacés les unes des autres, en général avec un pas constant.  In Figure 10, the spacers 18 are ribs formed in one dimension and spaced from each other, generally with a constant pitch.

A la figure 11, les nervures 18 (réparties selon une ou deux dimensions) de la plaque 17' sont suffisamment larges pour que la plaque en 20 matériau viscoélastique en occupe la partie creuse 19 (voir en particulier l'encadré de la figure 1 1).  In FIG. 11, the ribs 18 (distributed in one or two dimensions) of the plate 17 ′ are wide enough for the plate of viscoelastic material to occupy the hollow part 19 thereof (see in particular the box in FIG. 1 1 ).

Une autre variante met en oeuvre une contre-plaque 17 d'épaisseur réduite, et elle est rigidifiée par un grillage 5 défini précédemment, qui est collé sur la face interne de la contre-plaque 17' en prenant la 25 précaution que la colle ne remplisse pas les mailles du grillage à fin d'éviter le contact avec l'absorbant acoustique (figure 12).  Another variant uses a counter-plate 17 of reduced thickness, and it is stiffened by a grid 5 defined above, which is glued to the internal face of the counter-plate 17 'taking the precaution that the glue does not do not fill the mesh of the mesh in order to avoid contact with the acoustic absorbent (figure 12).

Claims (10)

REVENDICATIONS 1) Panneau acoustique comprenant une première et une deuxième paroi entre lesquelles est disposé un absorbant acoustique s caractérisé en ce que, entre l'absorbant (3) et la première paroi (1), sont disposés des éléments d'écartement (5, 6, 8, 18) répartis selon au moins une dimension et créant une lame d'air entre l'absorbant (3) et la première paroi (1).  1) Acoustic panel comprising a first and a second wall between which is placed an acoustic absorbent s characterized in that, between the absorbent (3) and the first wall (1), are arranged spacer elements (5, 6 , 8, 18) distributed along at least one dimension and creating an air space between the absorbent (3) and the first wall (1). 2) Panneau acoustique selon la revendication 1, caractérisé 1o en ce que les éléments d'écartement (5, 6, 8, 18) forment un réseau à deux dimensions.2) Acoustic panel according to claim 1, characterized 1o in that the spacer elements (5, 6, 8, 18) form a two-dimensional network. 3) Panneau acoustique selon la revendication 2, caractérisé en ce que ledit réseau comporte une grille, un nid d'abeille ou un gaufrage.3) Acoustic panel according to claim 2, characterized in that said network comprises a grid, a honeycomb or an embossing. 4) Panneau acoustique selon la revendication 3, caractérisé s5 en ce que la grille, le nid d'abeille ou le gaufrage constitue un filet (7) à l'intérieur duquel est placé l'absorbant acoustique (3).  4) Acoustic panel according to claim 3, characterized s5 in that the grid, the honeycomb or the embossing constitutes a net (7) inside which is placed the acoustic absorbent (3). 5) Panneau acoustique selon la revendication 3, caractérisé en ce qu'il comporte un sac (14) dans lequel est disposé l'absorbant acoustique, ce sac étant gaufré (15) au moins sur une face tournée vers la 20 première paroi (1).  5) Acoustic panel according to claim 3, characterized in that it comprises a bag (14) in which the acoustic absorbent is disposed, this bag being embossed (15) at least on one side facing the first wall (1 ). 6) Panneau acoustique selon une des revendications 4 à 5, caractérisé en ce que ledit filet ou le sac est en matériau thermiquement conducteur de sorte qu'il constitue un drain thermique entre lesdites parois (1, 2).  6) Acoustic panel according to one of claims 4 to 5, characterized in that said net or bag is made of thermally conductive material so that it constitutes a heat sink between said walls (1, 2). 7) Panneau acoustique selon la revendication 2, caractérisé en ce que le réseau comporte des picots (8) répartis selon lesdites deux dimensions.  7) Acoustic panel according to claim 2, characterized in that the network comprises pins (8) distributed along said two dimensions. 8) Panneau acoustique selon une des revendications 2 à 7, caractérisé en ce qu'il comporte un film autocollant (9) portant ledit réseau, ce 30 film étant collé, soit sur la première paroi (1) , soit sur l'absorbant acoustique (3), notamment sur un emballage (4) de l'absorbant acoustique (3).8) Acoustic panel according to one of claims 2 to 7, characterized in that it comprises a self-adhesive film (9) carrying said network, this film being bonded either to the first wall (1) or to the acoustic absorbent (3), in particular on a package (4) of the sound absorbent (3). 9) Panneau acoustique selon une des revendications 1 ou 2, caractérisé en ce que la première paroi présente (1), sur une face interne (11) dirigée vers l'absorbant acoustique, une plaque (17) en matériau 35 viscoélastique et une contre-plaque (17') portant lesdits éléments d'écartement (5, 18).  9) Acoustic panel according to one of claims 1 or 2, characterized in that the first wall has (1), on an internal face (11) directed towards the acoustic absorbent, a plate (17) of viscoelastic material and a counter -plate (17 ') carrying said spacer elements (5, 18). 10) Panneau acoustique selon la revendication 9, caractérisé en ce que la contre-plaque (17') comporte un gaufrage (18) constituant lesdits éléments d'écartement ou bien comporte un revêtement gaufré ou bien un grillage.  10) Acoustic panel according to claim 9, characterized in that the counterplate (17 ') has an embossing (18) constituting said spacers or else has an embossed coating or a mesh.
FR0215119A 2002-12-02 2002-12-02 DOUBLE-WALL ACOUSTIC PANEL Expired - Fee Related FR2847919B1 (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
FR0215119A FR2847919B1 (en) 2002-12-02 2002-12-02 DOUBLE-WALL ACOUSTIC PANEL
ES03789519T ES2279214T3 (en) 2002-12-02 2003-11-27 DOUBLE WALL ACOUSTIC PANEL.
EP03789519A EP1570139B1 (en) 2002-12-02 2003-11-27 Double-wall acoustic panel
PCT/FR2003/003513 WO2004053246A1 (en) 2002-12-02 2003-11-27 Double-wall acoustic panel
US10/537,036 US20060124388A1 (en) 2002-12-02 2003-11-27 Double wall acoustic panel
AT03789519T ATE348226T1 (en) 2002-12-02 2003-11-27 DOUBLE WALL ACOUSTIC PANEL
DE60310451T DE60310451T2 (en) 2002-12-02 2003-11-27 DOUBLE-WALLED ACOUSTIC PANEL

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR0215119A FR2847919B1 (en) 2002-12-02 2002-12-02 DOUBLE-WALL ACOUSTIC PANEL

Publications (2)

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FR2847919A1 true FR2847919A1 (en) 2004-06-04
FR2847919B1 FR2847919B1 (en) 2005-11-11

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US (1) US20060124388A1 (en)
EP (1) EP1570139B1 (en)
AT (1) ATE348226T1 (en)
DE (1) DE60310451T2 (en)
ES (1) ES2279214T3 (en)
FR (1) FR2847919B1 (en)
WO (1) WO2004053246A1 (en)

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ES2279214T3 (en) 2007-08-16
DE60310451T2 (en) 2007-10-11
EP1570139A1 (en) 2005-09-07
EP1570139B1 (en) 2006-12-13
WO2004053246A1 (en) 2004-06-24
ATE348226T1 (en) 2007-01-15
US20060124388A1 (en) 2006-06-15
FR2847919B1 (en) 2005-11-11

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