WO2022223906A1 - Dispositif d'atténuation acoustique pourvu d'inserts en matériau acoustiquement absorbant - Google Patents
Dispositif d'atténuation acoustique pourvu d'inserts en matériau acoustiquement absorbant Download PDFInfo
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- WO2022223906A1 WO2022223906A1 PCT/FR2022/050696 FR2022050696W WO2022223906A1 WO 2022223906 A1 WO2022223906 A1 WO 2022223906A1 FR 2022050696 W FR2022050696 W FR 2022050696W WO 2022223906 A1 WO2022223906 A1 WO 2022223906A1
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- WIPO (PCT)
- Prior art keywords
- acoustic attenuation
- attenuation device
- inserts
- support
- insert
- Prior art date
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Classifications
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B9/00—Ceilings; Construction of ceilings, e.g. false ceilings; Ceiling construction with regard to insulation
- E04B9/04—Ceilings; Construction of ceilings, e.g. false ceilings; Ceiling construction with regard to insulation comprising slabs, panels, sheets or the like
- E04B9/0428—Ceilings; Construction of ceilings, e.g. false ceilings; Ceiling construction with regard to insulation comprising slabs, panels, sheets or the like having a closed frame around the periphery
-
- 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
- E04B1/8404—Sound-absorbing elements block-shaped
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B9/00—Ceilings; Construction of ceilings, e.g. false ceilings; Ceiling construction with regard to insulation
- E04B9/001—Ceilings; Construction of ceilings, e.g. false ceilings; Ceiling construction with regard to insulation characterised by provisions for heat or sound insulation
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B9/00—Ceilings; Construction of ceilings, e.g. false ceilings; Ceiling construction with regard to insulation
- E04B9/04—Ceilings; Construction of ceilings, e.g. false ceilings; Ceiling construction with regard to insulation comprising slabs, panels, sheets or the like
- E04B9/0464—Ceilings; Construction of ceilings, e.g. false ceilings; Ceiling construction with regard to insulation comprising slabs, panels, sheets or the like having irregularities on the faces, e.g. holes, grooves
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B9/00—Ceilings; Construction of ceilings, e.g. false ceilings; Ceiling construction with regard to insulation
- E04B9/04—Ceilings; Construction of ceilings, e.g. false ceilings; Ceiling construction with regard to insulation comprising slabs, panels, sheets or the like
- E04B9/0478—Ceilings; Construction of ceilings, e.g. false ceilings; Ceiling construction with regard to insulation comprising slabs, panels, sheets or the like of the tray type
- E04B9/0485—Ceilings; Construction of ceilings, e.g. false ceilings; Ceiling construction with regard to insulation comprising slabs, panels, sheets or the like of the tray type containing a filling element
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- 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
- E04B2001/742—Use of special materials; Materials having special structures or shape
- E04B2001/745—Vegetal products, e.g. plant stems, barks
-
- 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
- E04B2001/8423—Tray or frame type panels or blocks, with or without acoustical filling
- E04B2001/8433—Tray or frame type panels or blocks, with or without acoustical filling with holes in their face
- E04B2001/8438—Slot shaped holes
Definitions
- TITLE Acoustic attenuation device provided with inserts in acoustically absorbing material
- the present invention relates to a sound attenuation device, for example for buildings.
- Such acoustic attenuation panels can for example be made of polystyrene, cement concrete or even glass wool or rock wool.
- acoustic attenuation panels have drawbacks.
- polystyrene sound attenuation panels have relatively low fire resistance and recyclability and have a large environmental impact, and glass wool and rock wool sound attenuation panels also have low recyclability.
- cement concrete sound attenuation panels have relatively low or even zero sound absorption properties if not combined with porous panels with sound absorption properties.
- porous panels can prove to be difficult or inappropriate in particular in humid environments, such as in swimming pools.
- the present invention aims to remedy all or part of these drawbacks.
- the technical problem underlying the invention therefore consists in providing an acoustic attenuation device which is of simple and economical structure, while presenting improved acoustic attenuation performance.
- the present invention relates to an acoustic attenuation device comprising:
- each insert made of acoustically absorbent material, the two inserts being separate from each other and being separated from each other so as to delimit a longitudinal slot between them, each insert comprising a front surface intended to be oriented towards a space to be acoustically attenuated, and
- each support element which are made of substantially acoustically impermeable material and which at least partially delimit a cavity interior in which the two inserts are arranged, each support element comprising an overlapping part partially covering the front surface of a respective insert in such a way that the front surfaces of the two inserts are partially exposed, the two overlapping parts delimiting at least a passage opening which opens into the internal cavity and which is located at least partially opposite the longitudinal slot so as to free access to the longitudinal slot, from outside the acoustic attenuation device and in particular from the space to be acoustically attenuated.
- the presence of the longitudinal slot between the two inserts made of acoustically absorbent material and of the at least one passage opening introduces surface irregularities at the level of the exposed face of the acoustic attenuation device which is intended to be oriented towards the space to be acoustically attenuated.
- Such surface irregularities coupled with the presence of the two inserts made of acoustically absorbent material, respectively induce phenomena of diffraction of the sound waves coming from the space to be acoustically attenuated and phenomena of acoustic absorption of said sound waves.
- the presence of the longitudinal slot induces pressure diffusion phenomena increasing acoustic absorption at low frequencies.
- the acoustic attenuation device has improved acoustic attenuation performance compared to the acoustic attenuation devices of the prior art, and in particular a high acoustic absorption coefficient over a wide frequency range. , and this while a large part of the external surfaces of the acoustic attenuation device in contact with the air, and therefore with the sound waves, is made of a substantially acoustically impermeable material.
- the acoustic attenuation device can attenuate the surrounding noise in a wide band of frequencies by adapting the dimensions of the longitudinal slot, of the covering parts and of the at least one passage opening.
- such a configuration of the acoustic attenuation device according to the present invention makes it possible to produce a maximum of external surfaces of the acoustic attenuation device in a substantially acoustically impermeable material, such as concrete or metal, and therefore to give the device acoustic attenuation high mechanical strength.
- the acoustic attenuation device may also have one or more of the following characteristics, taken alone or in combination.
- the acoustic attenuation device comprises an exposed face which is intended to be oriented towards and to be located in the space to be acoustically attenuated, the exposed face being partly defined by the two parts recovery.
- the sound attenuation device has a sound absorption coefficient greater than 0.5.
- the internal cavity communicates with the exterior of the acoustic attenuation device via the at least one passage opening, and preferably only via the at least one passage opening.
- the internal cavity extends longitudinally.
- the internal cavity has a generally parallelepipedic shape.
- the two covering parts extend substantially in the same plane.
- each insert has a rectangular section.
- the at least one passage opening is elongated and extends along a direction of extension.
- the at least one passage opening is a passage slot which has a width greater than a width of the longitudinal slot.
- the passage slot has a width of between 2 and 10 cm, and for example between 7 and 8 cm.
- the longitudinal slot has a width of between 0.5 and 1.9 cm, and for example of approximately 1 cm.
- the longitudinal slot is centered with respect to the passage slot.
- the passage slot has the same length as the internal cavity.
- the internal cavity has a width greater than the width of the passage slot.
- the passage slot is substantially parallel to the longitudinal slot.
- each insert is elongated and extends along a direction of extension.
- each insert extends substantially parallel to the longitudinal slot.
- each insert is made of hemp concrete.
- each insert could be made of mineral wool, for example glass wool or rock wool, or an acoustically absorbent foam.
- each covering part has a thickness less than the thickness of the respective insert.
- each covering part has a thickness of between 1 mm and 3 cm, and for example between 1 and 5 mm, and advantageously between 1 and 3 mm.
- each insert has a thickness of between 3 and 10 cm, and for example between 3.5 and 6 cm.
- each support element is metallic, and for example stainless steel.
- each support element is made of cement concrete, and for example of Ultra High Performance Fiber Concrete (UHPC).
- UHPC Ultra High Performance Fiber Concrete
- each support element has the shape of an angle iron.
- each support element has an L-section.
- the two support elements are distinct from each other and separated from each other.
- the acoustic attenuation device comprises a rear wall connecting the two support elements to each other, the rear wall and the two support elements forming a box and delimiting the cavity internal in which the two inserts are arranged.
- the two support elements respectively form the two side walls of the box.
- the two cover parts extend substantially parallel to the rear wall.
- the box is elongated.
- the box has a generally parallelepipedic shape.
- the acoustic attenuation device further comprises a structural layer which is made of a substantially acoustically impermeable material, the two inserts and the two support elements being fixed to, and for example at least partially integrated in, the structural layer.
- a structural layer which is made of a substantially acoustically impermeable material, the two inserts and the two support elements being fixed to, and for example at least partially integrated in, the structural layer.
- the substantially acoustically impermeable material forming the structural layer has an acoustic absorption coefficient of less than 0.2.
- the structural layer is obtained by hardening a cementitious composition.
- the cementitious composition forming the structural layer comprises at least one hydraulic binder.
- the hydraulic binder comprises at least one cement chosen from a Portland cement, an aluminous cement, a sulfoaluminate cement and/or a prompt natural cement.
- the structural layer is made of cement concrete.
- the structural layer comprises a first external surface and a second external surface opposite the first external surface, the first external surface being intended to be oriented towards the space to be acoustically attenuated.
- the structural layer has a substantially parallelepipedal shape.
- each insert comprises a first side surface and a second side surface which is opposite the respective first side surface, the first side surfaces of the two inserts delimiting the longitudinal slot.
- the first side surfaces of the two inserts are located directly opposite each other. In other words, no structural element is disposed between the first side surfaces of the two inserts.
- the covering parts extend on either side of a longitudinal plane extending between the two inserts and in the longitudinal slot, and more particularly extend longitudinally on either side. on the other side of the longitudinal slot.
- each support element and more particularly the covering part of each support element, extends along the respective insert.
- each cover part comprises an internal longitudinal edge, the internal longitudinal edges of the two cover parts delimiting the at least one passage opening.
- each support element is elongated and extends substantially parallel to the longitudinal slot.
- each support element comprises an attachment part fixed to the structural layer.
- each fixing part is partially integrated into the structural layer.
- each fixing part is secured to the structural layer during the hardening of the cementitious composition forming the structural layer.
- the two inserts are spaced apart by a distance less than the width of one insert.
- the longitudinal slot has a width greater than one tenth of the width of the passage slot.
- the passage slot has a width less than twice the width of an insert.
- each insert is in one piece, that is to say is made in one piece.
- the present invention also relates to an acoustic attenuation assembly comprising a retaining element and at least two acoustic attenuating devices according to the present invention, each acoustic attenuating device being fixed to the retaining element.
- the acoustic attenuation assembly is configured to be placed between two pre-slabs of concrete.
- the acoustic attenuation assembly is configured to rest on the concrete pre-slabs.
- the two acoustic attenuation devices are spaced from each other and extend substantially in the same extension plane.
- the acoustic attenuation assembly comprises a retaining element, for example metallic, comprising a retaining part which is substantially planar, the support elements of the two acoustic attenuation devices being fixed to the retaining part so that the retaining part and the support elements form two boxes defining two internal cavities in each of which the two respective inserts are arranged.
- the retaining element further comprises two lateral support parts which are configured to rest on the pre-slabs.
- the retaining part comprises, on its face opposite the acoustic attenuation devices, anti-slip projections.
- the acoustic attenuation assembly comprises a support part which is fixed to the retaining element, the support part comprising two lateral branches which respectively form the adjacent support elements of the two sound attenuation devices.
- the support part further comprises a central chute which connects the two lateral branches of the support part to each other, the central chute and the retaining part delimiting a cavity central.
- the acoustic attenuation assembly further comprises perforated cover elements which partially cover the passage openings delimited by the support elements.
- each perforated cover element is metallic, and has a perforation rate greater than 70%.
- each perforated covering element is fixed, preferably in a removable manner, to the covering parts of the support elements of a respective acoustic attenuation device.
- the acoustic attenuation assembly comprises a closure plate which is removable and which delimits, with the support part, an internal chamber in which longitudinal elements, such as fluid pipes and/or electric cables, can be arranged.
- the present invention further relates to a construction element for a building comprising a support structure and a plurality of acoustic attenuation devices according to the present invention, each acoustic attenuation device being fixed to the support structure.
- the acoustic attenuation devices are arranged substantially parallel to each other.
- the support structure is made of a substantially acoustically impermeable material.
- the substantially acoustically impermeable material forming the support structure has an acoustic absorption coefficient of less than 0.2.
- the support structure is obtained by hardening a hardenable material.
- the hardenable material is a cementitious composition.
- the support structure is made of cement concrete.
- each acoustic attenuation device is at least partially embedded in the support structure before the hardening of the hardenable material forming the support structure.
- each acoustic attenuation device is attached to the support structure.
- Each acoustic attenuation device can for example be fixed to the support structure by gluing, clipping, screwing or by any other means.
- two adjacent acoustic attenuation devices of said plurality of acoustic attenuation devices are connected to each other by a connecting wall which partially delimits a longitudinal internal chamber.
- the connecting wall and the covering parts of the two adjacent acoustic attenuation devices extend substantially in the same plane.
- the construction element comprises fluid pipes and/or electric cables extending in the longitudinal internal chamber.
- the support structure comprises: - a plurality of concrete pre-slabs spaced from each other, one or more acoustic attenuation devices being arranged between two adjacent concrete pre-slabs, and
- the construction element comprises fluid flow tubes, such as PER tubes, positioned on the pre-slabs and embedded in the layer of concrete.
- the construction element is intended to at least partially form a ceiling, a wall or a floor.
- the construction element is a pre-slab.
- the construction element is a slab.
- Figure 1 is a perspective view of an acoustic attenuation device according to a first embodiment of the present invention.
- Figure 2 is a cross-sectional view of the acoustic attenuation device of Figure 1.
- Figure 3 is a diagram representing the variation as a function of the frequency of a sound absorption coefficient of the sound attenuation device of Figure 1.
- Figure 4 is a cross-sectional view of an acoustic attenuation device according to a second embodiment of the present invention.
- Figure 5 is a cross-sectional view of a building element comprising a plurality of acoustic attenuation devices according to a third embodiment of the present invention.
- Figure 6 is a cross-sectional view of a building element comprising a plurality of acoustic attenuation devices according to a fourth embodiment of the present invention.
- Figure 7 is a cross-sectional view of a building element comprising a plurality of acoustic attenuation devices according to a fifth embodiment of the present invention.
- Figure 8 is a cross-sectional view of an acoustic attenuation assembly comprising two acoustic attenuation devices according to a sixth embodiment of the present invention.
- Figure 9 is an exploded perspective view of the acoustic attenuation assembly of Figure 8.
- Figure 10 is a cross-sectional view of an acoustic attenuation assembly comprising two acoustic attenuation devices according to a seventh embodiment of the present invention.
- Figures 1 and 2 show an acoustic attenuation device 2 adapted to achieve acoustic attenuation of noise in a building, such as for example an individual dwelling, a collective dwelling, an office building, an agricultural or semi-agricultural building.
- the acoustic attenuation device 2 can be used both to achieve acoustic insulation of a new building or for the renovation of an old building.
- the acoustic attenuation device 2 can be fixed to a wall or a ceiling of the building, or be integrated into a ceiling of the building.
- the acoustic attenuation device 2 advantageously has a generally parallelepipedic shape.
- the acoustic attenuation device 2 may for example have a thickness less than or equal to 0.1 m, a width less than or equal to 0.5 m, and a length less than or equal to 1.2 m.
- the acoustic attenuation device 2 comprises a structural layer 3 which has a substantially parallelepipedal shape and which comprises a first outer surface 4 and a second outer surface 5 opposite the first surface external 4.
- the first external surface 4 of the structural layer 3 is intended to be oriented towards a space to be acoustically attenuated.
- the structural layer 3 is advantageously made of a substantially acoustically impermeable material which advantageously has a sound absorption coefficient a of less than 0.2, and for example less than 0.1.
- the structural layer 3 is obtained by hardening a cementitious composition comprising in particular a hydraulic binder, at least one adjuvant, water and aggregates or aggregates, such as sand.
- the hydraulic binder advantageously comprises at least one cement chosen from a Portland cement, an aluminous cement, a sulfoaluminate cement and/or a prompt natural cement.
- the structural layer 3 can for example be made of cement concrete.
- the structural layer 3 more particularly comprises a longitudinal groove 6 provided on the first external surface 4.
- the acoustic attenuation device 2 further comprises two support elements 7 which are made of substantially acoustically impermeable material and which are integral with the structural layer 3.
- each support element 7 is metallic, for example stainless steel, and has the shape of an angle.
- the two support elements 7 are separate from each other and separated from each other.
- Each support element 7 comprises a fixing part 8 fixed to a respective side wall of the longitudinal groove 6, and a covering part 9 which extends perpendicularly to the respective fixing part 8 and in the plane of extension of the first external surface 4 of the structural layer 3.
- Each fixing part 8 can for example be partially integrated into the structural layer 3, and be secured to the latter during the hardening of the cementitious composition forming the structural layer 3.
- the two support elements 7 and the structural layer 3 delimit an internal cavity 11 which extends longitudinally and which has a generally parallelepipedal shape.
- the covering parts 9 of the two support elements 7, and more particularly the internal longitudinal edges of the covering parts 9, delimit a passage slot 12 which opens into the internal cavity 11 and which extends over substantially the entire length of the internal cavity 11.
- the internal cavity 11 has a width greater than the width of the passage slot 12, and communicates with the exterior of the acoustic attenuation device 2 through the passage slot 12.
- the acoustic attenuation device 2 also comprises two inserts 13 made of acoustically absorbent material arranged in the internal cavity 11. According to the embodiment represented in FIGS. 1 and 2, each insert 13 is elongated and extends in a direction of extension. Advantageously, each insert 13 extends substantially parallel to the passage slot 12. Each insert 13 may for example have a rectangular section.
- each insert 13 is made of hemp concrete.
- each insert 13 could be made of mineral wool, for example glass wool or rock wool, or an acoustically absorbent foam.
- the two inserts 13 are distinct from each other and are separated from each other so as to delimit between them a longitudinal slot 14 which is substantially parallel to the passage slot 12 and to the direction of extension inserts 13.
- the longitudinal slot 14 is centered with respect to the passage slot 12.
- the passage slot 12 has a width greater than the width of the longitudinal slot 14 and is located opposite the longitudinal slot 14 so as to free up access to the longitudinal slot 14.
- Each insert 13 comprises a front surface 13.1 intended to be oriented towards the space to be acoustically attenuated, a rear surface 13.2 oriented towards the bottom of the internal cavity 11, a first lateral surface 13.3 partially delimiting the longitudinal slot 14 and a second lateral surface 13.4 oriented towards a respective fixing part 8.
- each covering part 9 of each support element 7 partially covers the front surface 13.1 of a respective insert 13 such that the front surfaces 13.1 of the two inserts 13 are partially exposed.
- each covering part 9 has a thickness less than the thickness of the respective insert 13, and at least 15% of the front face 13.1 of each insert 13 is exposed.
- the passage slot 12 has a width of between 2 to 10 cm, and for example between 7 and 8 cm
- the longitudinal slot 14 has a width of between 0.5 to 1, 9 cm, and for example about 1 cm or about 1.5 cm.
- each covering part 9 has a thickness of between 1 mm and 3 cm, and for example between 1 and 5 mm
- each insert 13 has a thickness of between 3 and 10 cm, and for example between 3.5 and 6 cm.
- Each insert 13 can also have a width of between 3 and 8 cm, and for example between 4 and 6 cm.
- such a configuration of the acoustic attenuation device 2 makes it possible to obtain an average acoustic absorption coefficient of approximately 0.7 over the frequency range 500Hz-5000Hz, and this for a structural layer 3 having a low thickness and made of cement concrete and for covering parts 9 of 3 mm thickness and inserts 13 of 5 cm thickness.
- FIG. 4 represents an acoustic attenuation device 2 according to a second embodiment of the invention which differs from the first embodiment essentially in that the acoustic attenuation device 2 comprises a rear wall 15, for example made of material substantially acoustically impermeable, which connects the fixing parts 8 of the two support elements 7 to each other and which has a length substantially identical to that of the support elements 7, and in that the rear wall 15 and the two support elements 7 form a box 16 of generally parallelepiped shape and delimit the internal cavity 11 in which the two inserts 13 are arranged
- the rear wall 15 and the two support elements 7 are made in one piece.
- the two support elements 7 respectively form the two side walls of the box 16, and the two cover parts 9 extend substantially parallel to the rear wall 15.
- FIG. 5 represents a construction element 17 for a building, such as a pre-slab, comprising a support structure 18 made of substantially acoustically impermeable material and a plurality of acoustic attenuation devices 2 arranged substantially parallel to each other and conforming to a third embodiment of the present invention.
- the substantially acoustically impermeable material forming the support structure 18 advantageously has a sound absorption coefficient of less than 0.2, and for example less than 0.1.
- the support structure 18 is obtained by hardening a cementitious composition, and can for example be made of cement concrete.
- Each acoustic attenuation device 2 according to the third embodiment of the invention differs from the first embodiment represented in FIGS. 1 and 2 essentially in that it lacks a structural layer 3.
- the two support elements 7 and the two inserts 13 of each acoustic attenuation device 2 are in particular secured to the support structure 18 by partially embedding them in the cementitious composition forming the support structure 18 before it hardens.
- acoustic attenuation devices 2 according to the first embodiment could be secured to the support structure 18.
- FIG. 6 represents a construction element 17 for a building, such as a pre-slab, comprising a support structure 18 made of substantially acoustically impermeable material and a plurality of acoustic attenuation devices 2 arranged substantially parallel to each other and conforming to a fourth embodiment of the present invention.
- Each acoustic attenuation device 2 according to the fourth embodiment of the invention differs from the second embodiment represented in FIG. 4 essentially in that it lacks a structural layer 3.
- the box 16 formed by the rear wall 15 and the two support elements 7 of each acoustic attenuation device 2 can be secured to the support structure 18 in different ways.
- the box 16 can for example be partially embedded in the cementitious composition forming the support structure 18 before it hardens, or can be attached to the support structure 18 and be fixed to the latter, for example by gluing, clipping, screwing or by any other way.
- acoustic attenuation devices 2 according to the second embodiment could be secured to the support structure 18.
- FIG. 7 represents a construction element 17 for a building, such as a slab, comprising a support structure 18 made of substantially acoustically impermeable material and a plurality of acoustic attenuation devices 2 arranged substantially parallel to each other and conforming to a fifth embodiment of the present invention.
- the support structure 18 comprises:
- said plurality of acoustic attenuation devices notably comprises two adjacent acoustic attenuation devices 2 which are connected to each other by a connecting wall 22.
- the connecting wall 22 advantageously extends in the plane of extension of the overlapping parts 9 of the two adjacent acoustic attenuation devices 2 and partially delimits a longitudinal internal chamber 23 in which longitudinal elements 24, such as fluid pipes and/or electrical cables, can be laid out.
- the construction element 17 shown in Figure 7 further comprises fluid flow tubes 25, such as PER tubes, positioned on the pre-slabs and embedded in the concrete layer 21, and connecting elements 26 which are configured to fluidically connect the fluid flow tubes 25 to each other and which are also positioned on the pre-slabs and embedded in the concrete layer 21.
- fluid flow tubes 25 such as PER tubes
- connecting elements 26 which are configured to fluidically connect the fluid flow tubes 25 to each other and which are also positioned on the pre-slabs and embedded in the concrete layer 21.
- Figures 8 and 9 show an acoustic attenuation assembly 27 which is configured to be placed between two adjacent concrete pre-slabs 19 and which comprises two acoustic attenuation devices 2 in accordance with a sixth embodiment of the present invention.
- the acoustic attenuation assembly 27 is configured to rest on the concrete pre-slabs 19, and the two acoustic attenuation devices 2 are spaced from each other and extend substantially in the same plane. extension.
- the acoustic attenuation assembly 27 comprises a retaining element 28 which is advantageously metallic and which can for example be obtained by bending a metal sheet.
- the retaining element 28 comprises a retaining part 29 which is substantially planar and which can for example have a rectangular shape.
- the support elements 7 of the two acoustic attenuation devices 2 are fixed to the retaining part 29 in such a way that the retaining part 29 and the support elements 7 form two boxes 16 and delimit two internal cavities 11 in each of which are arranged the two respective inserts 13.
- the two lateral portions of the retaining part 29 more particularly form two rear walls each connecting the two respective support elements 7 .
- the retaining element 28 further comprises two lateral support parts 31 which extend substantially parallel to one another and which are configured to rest on the pre-slabs 19.
- the lateral support parts 31 s extend more particularly from two opposite side edges of the retaining part 29.
- the retaining part 29 can advantageously comprise, on its face opposite the acoustic attenuation devices 2, anti-slip projections 32, such as anti-slip pads.
- anti-slip projections 32 makes it possible to prevent slipping, and therefore a fall, of a person having to move on the retaining part 29, in particular when the acoustic attenuation assembly 27 is intended to be incorporate into the ceiling of a building.
- the acoustic attenuation assembly 27 comprises a support piece 33 which is fixed to the retaining element 28, and more particularly to the retaining part 29, and which extends in a middle part of the retaining part 29.
- the support part 33 comprises two lateral branches which respectively form the adjacent support elements 7 of the two acoustic attenuation devices 2.
- the support part 33 further comprises a central channel 34 which connects the two lateral branches of the support part 33 to each other.
- the central channel 34 and the retaining part 29 delimit a central cavity 35.
- the support elements 7, which are configured to be located close to the pre-slabs 19, each have the shape of an angle iron and are fixed to the retaining element 28, and by example to the side support parts 31.
- two adjacent acoustic attenuation assemblies 27 can be assembled to one another by means of two assembly parts 36 introduced into receiving housings 37 delimited for example by the lateral support parts 31.
- a layer of concrete can be poured over the concrete pre-slabs 19 and the acoustic attenuation assembly 27 so as to secure the concrete pre-slabs 19 and the acoustic attenuation assembly 27, and to form an element of construction for a building, such as a slab.
- Fluid flow tubes such as PER tubes, can advantageously be positioned on the pre-slabs 19 and be embedded in the concrete layer, so as to form an active slab.
- FIG 10 shows an acoustic attenuation assembly 27 which differs from that shown in Figures 8 and 9 essentially in that it further comprises perforated cover elements 38, such as perforated cover plates or cover grids perforated, which partially cover the passage slots 12 delimited by the support elements 7.
- perforated cover elements 38 such as perforated cover plates or cover grids perforated, which partially cover the passage slots 12 delimited by the support elements 7.
- each perforated cover element 38 is metallic, and has a perforation rate greater than 70%.
- each perforated covering element 38 is fixed, preferably in a removable manner, to the covering parts 9 of the support elements 7 of the same acoustic attenuation device 2.
- the acoustic attenuation assembly 27 represented in FIG. 10 also comprises a closure plate 39 which is removable and which delimits, with the support part 33, an internal chamber 41 in which longitudinal elements, such as fluid pipes and/or electric cables, can be arranged.
- the closing plate 39 advantageously extends substantially in the plane of extension of the covering parts 9 of the two adjacent acoustic attenuation devices 2 .
- the closure plate 39 rests on internal side edges of the perforated cover elements 38.
- the closure plate 39 could be removably fixed to the support piece 33, and for example to the adjacent support elements 7 of the two acoustic attenuation devices 2.
- closure plate 39 gives a more aesthetic appearance to the acoustic attenuation assembly 27.
- the presence of the central channel 34 makes it possible to avoid, for example when fixing longitudinal elements in the internal chamber 41, to pierce the concrete layer covering the acoustic attenuation assembly 27, and therefore to pierce any fluid flow tubes embedded in the concrete layer.
- each support element could be made of cement concrete, and for example of Ultra High Performance Fiber Concrete (UHPFRC), and that the acoustic attenuation device could comprise a plurality of passage openings, for example of circular, rectangular or any other shape, instead of the passage slot.
- UHPFRC Ultra High Performance Fiber Concrete
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP22722306.2A EP4326957A1 (fr) | 2021-04-19 | 2022-04-13 | Dispositif d'atténuation acoustique pourvu d'inserts en matériau acoustiquement absorbant |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR2104038A FR3121947B1 (fr) | 2021-04-19 | 2021-04-19 | Dispositif d’atténuation acoustique pourvu d’inserts en matériau acoustiquement absorbant |
FRFR2104038 | 2021-04-19 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2022223906A1 true WO2022223906A1 (fr) | 2022-10-27 |
Family
ID=76159585
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/FR2022/050696 WO2022223906A1 (fr) | 2021-04-19 | 2022-04-13 | Dispositif d'atténuation acoustique pourvu d'inserts en matériau acoustiquement absorbant |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP4326957A1 (fr) |
FR (1) | FR3121947B1 (fr) |
WO (1) | WO2022223906A1 (fr) |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2271871A (en) * | 1939-02-13 | 1942-02-03 | Charles L Newport | Sound absorbing unit |
DE1509156A1 (de) * | 1961-03-07 | 1968-12-05 | Alcometaller Ab | Wandverkleidung,insbesondere Deckenverkleidung |
US3903660A (en) * | 1973-09-11 | 1975-09-09 | Mark M Akins | Ceiling construction |
-
2021
- 2021-04-19 FR FR2104038A patent/FR3121947B1/fr active Active
-
2022
- 2022-04-13 EP EP22722306.2A patent/EP4326957A1/fr active Pending
- 2022-04-13 WO PCT/FR2022/050696 patent/WO2022223906A1/fr active Application Filing
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2271871A (en) * | 1939-02-13 | 1942-02-03 | Charles L Newport | Sound absorbing unit |
DE1509156A1 (de) * | 1961-03-07 | 1968-12-05 | Alcometaller Ab | Wandverkleidung,insbesondere Deckenverkleidung |
US3903660A (en) * | 1973-09-11 | 1975-09-09 | Mark M Akins | Ceiling construction |
Also Published As
Publication number | Publication date |
---|---|
EP4326957A1 (fr) | 2024-02-28 |
FR3121947A1 (fr) | 2022-10-21 |
FR3121947B1 (fr) | 2024-02-16 |
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