WO2023174727A1 - Noise attenuating panel for a piece of furniture - Google Patents

Noise attenuating panel for a piece of furniture Download PDF

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Publication number
WO2023174727A1
WO2023174727A1 PCT/EP2023/055589 EP2023055589W WO2023174727A1 WO 2023174727 A1 WO2023174727 A1 WO 2023174727A1 EP 2023055589 W EP2023055589 W EP 2023055589W WO 2023174727 A1 WO2023174727 A1 WO 2023174727A1
Authority
WO
WIPO (PCT)
Prior art keywords
flexible material
layer
density
noise
panel according
Prior art date
Application number
PCT/EP2023/055589
Other languages
French (fr)
Inventor
Gérald COTTA
Laura OLIVAS
Original Assignee
Safran Seats
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
Application filed by Safran Seats filed Critical Safran Seats
Publication of WO2023174727A1 publication Critical patent/WO2023174727A1/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form
    • B32B3/10—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a discontinuous layer, i.e. formed of separate pieces of material
    • B32B3/12—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a discontinuous layer, i.e. formed of separate pieces of material characterised by a layer of regularly- arranged cells, e.g. a honeycomb structure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form
    • B32B3/10—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a discontinuous layer, i.e. formed of separate pieces of material
    • B32B3/18—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a discontinuous layer, i.e. formed of separate pieces of material characterised by an internal layer formed of separate pieces of material which are juxtaposed side-by-side
    • B32B3/20—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a discontinuous layer, i.e. formed of separate pieces of material characterised by an internal layer formed of separate pieces of material which are juxtaposed side-by-side of hollow pieces, e.g. tubes; of pieces with channels or cavities
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/18—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by features of a layer of foamed material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/22—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed
    • B32B5/32—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed at least two layers being foamed and next to each other
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/02—Physical, chemical or physicochemical properties
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2250/00—Layers arrangement
    • B32B2250/04—4 layers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/10—Properties of the layers or laminate having particular acoustical properties
    • B32B2307/102—Insulating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2479/00—Furniture
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2605/00—Vehicles
    • B32B2605/003—Interior finishings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2605/00—Vehicles
    • B32B2605/18—Aircraft
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2607/00—Walls, panels

Definitions

  • the present invention relates to a noise attenuating panel for a piece of furniture.
  • the invention finds a particularly advantageous, but not exclusive, application with “business class” and “first class” type seat units in an airplane cabin.
  • such a seat unit comprises a seat and a shell extending at least partly around the seat so as to delimit a space around the passenger.
  • the seat offers the passenger different comfort positions, from a "seated” position to a "reclining” position, in which the seat defines a substantially horizontal sleeping surface so that the passenger can lie down.
  • Intermediate comfort positions are also offered, such as the “relax” position in which one of the seat backs is strongly inclined.
  • these intermediate positions are obtained by the inclination of the pivoting backrest around a horizontal axis and perpendicular to an axis of extension of the seat.
  • the passenger can then remain on the seat during transitions between different positions.
  • the seat generally consists in particular of the backrest and a seat and is likely to include a leg rest and/or a footrest, which may be fixed or linked to a kinematics of the seat.
  • Noise likely to disturb passengers' rest is an important environmental concern to take into consideration when developing a seat unit. There is therefore a need to reduce the perception of noise inside an aircraft cabin in order to optimize the acoustic comfort of passengers without reducing their living space.
  • the invention aims to effectively meet this need by proposing a noise attenuating panel for a furniture element comprising:
  • the invention thus makes it possible to obtain a porous sound trap which can be easily integrated into an environmental element of the seat. Indeed, once the waves penetrate inside the stack of layers of flexible material, the multiple reflections make it possible to reduce the intensity of noise perceived by the passenger at seat level.
  • the second layer of flexible material is provided with a plurality of through openings.
  • the first layer of flexible material, the second layer of flexible material, and the third layer of flexible material are constituted by layers of foam.
  • the first density, the second density, and the third density of the layers of flexible material are different from each other.
  • the first density, the second density, and the third density of the layers of flexible material are equal to each other.
  • the first layer of flexible material is permeable to sound and/or is perforated.
  • the second layer of flexible material has a lattice structure.
  • the third layer of flexible material is made of a material having sound absorption properties greater than the first layer of flexible material and the second layer of flexible material.
  • the first density of the first layer of flexible material is between 1.5 pcf and 5.5 pcf, or between 24.0 kg/m3 and 88.1 kg/m3.
  • the second density of the second layer of flexible material is between 3 pcf and 7 pcf, or between 48.0 kg/m3 and 112.1 kg/m3.
  • the third density of the third layer of flexible material is between 3 pcf and 9 pcf, or between 48.0 kg/m3 and 144.2 kg/m3.
  • the third layer of flexible material is intended to be fixed directly on one side of the furniture element.
  • said noise attenuator panel further comprises a support structure.
  • the support structure comprises removable fixing means for fixing the noise attenuating panel on the face of the seat furniture element.
  • the covering cap is made of a sound-permeable material.
  • the covering cap comprises a multitude of perforations to facilitate the passage of sound.
  • the invention also relates to an assembly comprising a furniture element and a noise attenuating panel as defined above fixed on one face of the furniture element.
  • the furniture element is chosen from: a privacy shell intended to extend at least partly around a seat, console, ottoman, or monument of a front or back row of an airplane cabin.
  • Figure 1 is a perspective view of a seat unit comprising a noise attenuating panel according to the present invention
  • Figure 2a is a side view of a noise attenuator panel according to the present invention.
  • Figure 2b is a side view of a noise attenuator panel showing the different layers of flexible material cut offset from each other;
  • Figure 3a is a sectional view illustrating a first embodiment according to which the noise attenuating panel according to the invention is fixed to one face of a furniture element directly via the face of a layer of flexible material;
  • Figure 3b is a sectional view illustrating a second embodiment according to which the noise attenuating panel according to the invention is fixed on one face of a furniture element via a support structure.
  • Figure 1 shows a seat unit 10 comprising a seat 12 associated with a side console 13 extending along one side of the seat 12.
  • a shell 14, called a privacy shell extends at least partly around the seat 12 so as to delimit a space around the passenger.
  • the privacy shell 14 is made for example from a composite material. Such a configuration makes it possible to guarantee the privacy of the passenger seated on the seat 12.
  • a video screen 16 of a multimedia system or IFE for "Inflight Entertainment System” in English) could be installed on a rear part of the shell 14 d privacy so as to be usable by a rear passenger.
  • the console 13 may include an upper wall 17 forming a table on which the passenger can place objects as well as a storage space 18 comprising one or more elements from a literature pouch, a bottle holder, or a minibar.
  • the choice of storage is configurable according to the wishes of the airline.
  • the console 13 may also include a reading light 19 intended to direct lighting towards the seat 12.
  • a cavity 21 is located under the upper wall 17.
  • the cavity 21 is open laterally towards the seat 12.
  • a horizontal face 22 of the console 13 has in particular an armrest function.
  • the horizontal face 22 may locally have the shape of a curved cuff 23 matching the shape of part of the passenger's arm.
  • the console 13 also includes a control unit 25 of the seat 12 and its ancillary components (called “PCU” for "Passenger Control Unit” in English).
  • the control unit 25 allows the passenger in particular to control the selection of a position of the seat 12 as well as the ancillary components, such as a video system, a heating device, an ambient lighting system or any other ancillary component which can be integrated into seat 12.
  • the seat unit 10 may also conventionally include a meal tablet 26 movable between a stored position (corresponding to that shown in Figure 1) in which the meal tablet 26 is located inside a housing provided in the console 13 and a deployed position in which the meal shelf 26 is located outside the housing to allow the passenger to place a meal tray there.
  • the seat 12 is advantageously provided with kinematics allowing it to be movable between a "seated” position, in which the seat 12 is configured to define a seated position of a passenger, and a "lying" position, in which the seat 12 is configured to define a sleeping surface for the passenger, advantageously substantially horizontal.
  • Intermediate comfort positions are also offered, such as the "relax" position in which a back of the seat 12 is strongly inclined.
  • the console 13 comprises a housing 27 seen through transparency in FIG. 1 in which an ottoman 28 is arranged.
  • the ottoman 28 has a horizontal face forming a footrest on which a passenger rear will be able to place his feet when the seat 12 is in the "lying" position.
  • the seat 12 comprises an extension axis X1 defined by the intersection between a horizontal plane and a vertical median plane of the seat 12 corresponding to a plane of symmetry of the seat 12.
  • the extension axis X1 of the seat 12 will be able to form a non-zero angle with respect to a direction parallel to or coincident with a central axis of the aircraft X2. In this case, the seat 12 is turned towards the axis X2. Alternatively, the seat 12 can be rotated in a direction opposite to the axis X2.
  • a noise attenuating panel 30 is fixed on one face of the privacy shell 14.
  • the noise attenuating panel 30 can be fixed on a front face of the privacy shell 14 located on the side of the seat 12
  • the noise attenuating panel 30 could be fixed on the rear face of the privacy shell 14.
  • the noise attenuating panel 30 could also be fixed on one side of the side console 13 located on the side of the seat 12 or around the ottoman 28.
  • the noise attenuating panel 30 can be fixed on one or more furniture elements of the seat 12, in particular chosen from: the privacy shell 14, the console 13, or the ottoman 28.
  • the furniture element on which the noise attenuating panel 30 is fixed may be constituted by a monument of a first row or a last row of an airplane cabin.
  • This monument may include storage space and/or a footrest for an extreme row seat in an airplane cabin.
  • the noise attenuator panel 30 comprises a covering cap 31, a first layer of flexible material 32.1 having a first density D1, a second layer of flexible material 32.2 having a second density D2, and a third layer of flexible material 32.3 having a third density D3.
  • the first layer of flexible material 32.1, the second layer of flexible material 32.2, and the third layer of flexible material 32.3 are three distinct layers stacked on top of each other.
  • the second layer of flexible material 32.2 is preferably provided with a plurality of through openings 33.
  • the first density D1, the second density D2, and the third density D3 of the layers of flexible material 32.1, 32.2, 32.3 can be different from each other.
  • the first density D1, the second density D2, and the third density D3 of the layers of flexible material are equal to each other.
  • the first density D1 and the second density D2 are equal to each other and different with respect to the third density D3.
  • the third density D3 is specific, that is to say different from, or equal to, the first density D1 or the second density D2.
  • the first layer of flexible material 32.1, the second layer of flexible material 32.2, and the third layer of flexible material 32.3 are constituted by layers of foam.
  • the covering cap 31 is made of a sound-permeable material.
  • the material of the covering cap 31 is also chosen to give an aesthetic finish to the whole.
  • the covering cap 31 could for example be made of a textile type material, leather, imitation leather, alcantara, or any other flexible material suitable for the application.
  • the material used may have a multitude of perforations to facilitate the passage of sound.
  • the covering cap 31 may have decorative patterns on its visible parts when the noise attenuating panel 30 is placed on the furniture element 13, 14, 28 of the seat 12. These decorative patterns may be personalized according to the airline company.
  • the first layer of flexible material 32.1 is permeable to sound and/or is perforated.
  • the first layer of flexible material 32.1 can also have a finishing function so that the noise attenuating panel 30 has a uniform external appearance without surface deformation due to the presence of the through openings 33 made in the second layer of flexible material 32.2.
  • the first density D1 of the first layer of flexible material 32.1 is for example between 1.5 pcf and 5.5 pcf, or between 24.0 kg/m3 and 88.1 kg/m3.
  • the second layer of flexible material 32.2 has a lattice structure, in particular diamond-shaped mesh.
  • This lattice structure comprises a plurality of arms 35 delimiting the through openings 33. Two adjacent through openings 33 are delimited between them by a common arm 35.
  • the arms 35 have the shape of elongated rods.
  • the arms 35 are in this case arranged in a diamond shape and the through openings 33 of corresponding shape also have a diamond shape.
  • the shape of the through openings 33 is however not limited to a diamond shape. Indeed, the through openings 33 can have any possible geometric shape, such as a circular, rectangular, square, triangular, oval, hexagonal, or other shape.
  • the second density D2 of the second layer of flexible material 32.2 is for example between 3 pcf and 7 pcf, or between 48.0 kg/m3 and 1 12.1 kg/m3.
  • the third layer of flexible material 32.3 is made of a material having sound absorption properties greater than the first layer of flexible material 32.1 and to the second layer of flexible material 32.2.
  • the third density D3 of the third layer of flexible material 32.3 is for example between 3 pcf and 9 pcf, or between 48.0 kg/m3 and 144.2 kg/m3.
  • the third layer of flexible material 32.3 can be loaded with graphite. This gives the noise attenuator panel 30 the performance necessary to pass fire resistance tests.
  • the second layer of flexible material 32.2 is placed between the first layer of flexible material 32.1 and the third layer of flexible material 32.3.
  • the positioning of the layers of flexible material 32.1, 32.2, 32.3 relative to each other inside the stack may vary depending on the application.
  • the noise attenuator panel 30 constitutes a sound trap based on the Helmholtz principle of sound reflection. Indeed, a sound wave 38 passes through the covering cap 31 and after having been partly attenuated by the first layer of flexible material 32.1, the sound wave 38 is reflected inside the second layer of flexible material 32.2 and of the third layer of flexible material 32.3 playing together a role of porous resonator. Following the multiple reflections inside the layers of flexible material, the intensity of the sound wave 38 leaving the noise attenuator panel 30 is very low. The noise perceived by the passenger at seat 12 is thus greatly reduced.
  • the third layer of flexible material 32.3 is fixed directly on one face of the furniture element 13, 14, 28, that is to say without support structure 40 intermediate.
  • the fixing of the third layer of flexible material 32.3 on the face of the furniture element 13, 14, 28 is carried out by gluing.
  • a total thickness E of the noise attenuator panel 30 may be between 1 mm and 50 mm and is preferably between 12 mm and 15 mm inclusive.
  • the thickness of the covering cap 31 is for example of the order of 1 mm
  • the thickness of the first layer of flexible material 32.1 is of the order of 2mm
  • the thickness of the second layer of flexible material 32.2 is of the order of 5mm
  • the thickness of the third layer of flexible material 32.3 is also of the order of 5mm.
  • a support structure 40 intended to be fixed on the face of the furniture element 13, 14, 28.
  • the covering cap 31 is provided with a flap fixed against an edge of the support structure 40.
  • the flap is fixed on the support structure 40 can be carried out by gluing, riveting, insertion into a retaining groove, or any other fixing technique adapted to the application with or without gluing.
  • the support structure 40 is advantageously made of a plastic material, in particular thermoformed, a metallic material, such as aluminum, or a very high density foam material.
  • the support structure 40 has a low thickness, for example between 0.5mm and 3mm.
  • a support structure 40 is used consisting of a plate made of a thermoplastic material. This plate is heated then shaped using a matrix. Once cooled, the thermoformed plate retains the shape printed by the die.
  • the support structure 40 comprises removable fixing means 41 for fixing the assembly "dressing cap 31 - layers 32.1, 32.2, 32.3 - support structure 40" on the face of the element of furniture 13, 14, 28.
  • the choice of fixing means 41 depends in particular on the integration constraints of the assembly and its positioning in the seat unit 12. In the case where the assembly is arranged in a visible area of the seat unit 12, discreet and removable fixing means 41 are preferably used without the use of tools, such as for example snap-fit devices, so-called "Velcro” fasteners (registered trademark) formed by Complementary loops and hooks, snaps, magnetic fasteners, or any other fastening device suitable for the application.

Landscapes

  • Soundproofing, Sound Blocking, And Sound Damping (AREA)
  • Laminated Bodies (AREA)

Abstract

The invention relates to a noise attenuator panel (30) for a piece of furniture, comprising: - a covering cap (31), - a first layer of flexible material (32.1) having a first density (01), - a second layer of flexible material (32.2) having a second density (02), and - a third layer of flexible material (32.3) having a third density (03).

Description

DESCRIPTION DESCRIPTION
TITRE : PANNEAU ATTÉNUATEUR DE BRUIT POUR UN ÉLÉMENT DE MOBILIER TITLE: NOISE ATTENUATOR PANEL FOR AN ITEM OF FURNITURE
[0001] La présente invention porte sur un panneau atténuateur de bruit pour un élément de mobilier. L'invention trouve une application particulièrement avantageuse, mais non exclusive, avec les unités de sièges de type "classe affaires" et "première classe" d'une cabine d'avion. [0001] The present invention relates to a noise attenuating panel for a piece of furniture. The invention finds a particularly advantageous, but not exclusive, application with “business class” and “first class” type seat units in an airplane cabin.
[0002] De façon connue en soi, une telle unité de siège comporte un siège et une coque s'étendant au moins en partie autour du siège de manière à délimiter un espace autour du passager. Une telle configuration permet de garantir l'intimité du passager. [0002] In a manner known per se, such a seat unit comprises a seat and a shell extending at least partly around the seat so as to delimit a space around the passenger. Such a configuration makes it possible to guarantee the privacy of the passenger.
[0003] Le siège offre au passager différentes positions de confort, d’une position "assise" jusqu'à une position "allongée", dans laquelle le siège définit un plan de couchage sensiblement horizontal pour que le passager puisse s’allonger. Des positions intermédiaires de confort sont aussi proposées, telles que la position "relax" dans laquelle un dossier du siège est fortement incliné. Généralement, ces positions intermédiaires sont obtenues par l'inclinaison du dossier pivotant autour d'un axe horizontal et perpendiculaire à un axe d’extension du siège. Le passager peut alors rester sur le siège lors de transitions entre les différentes positions. Le siège est généralement constitué notamment du dossier et d’une assise et est susceptible de comporter un repose-jambes et/ou un repose-pieds, pouvant être fixes ou liés à une cinématique du siège. [0003] The seat offers the passenger different comfort positions, from a "seated" position to a "reclining" position, in which the seat defines a substantially horizontal sleeping surface so that the passenger can lie down. Intermediate comfort positions are also offered, such as the “relax” position in which one of the seat backs is strongly inclined. Generally, these intermediate positions are obtained by the inclination of the pivoting backrest around a horizontal axis and perpendicular to an axis of extension of the seat. The passenger can then remain on the seat during transitions between different positions. The seat generally consists in particular of the backrest and a seat and is likely to include a leg rest and/or a footrest, which may be fixed or linked to a kinematics of the seat.
[0004] Le bruit susceptible de gêner le repos des passagers est une préoccupation environnementale importante à prendre en considération lors du développement d'une unité de siège. Il existe donc le besoin de réduire la perception du bruit à l'intérieur d'une cabine d'avion afin d'optimiser le confort acoustique des passagers sans toutefois réduire leur espace de vie. [0005] L'invention vise à combler efficacement ce besoin en proposant un panneau atténuateur de bruit pour un élément de mobilier comportant: [0004] Noise likely to disturb passengers' rest is an important environmental concern to take into consideration when developing a seat unit. There is therefore a need to reduce the perception of noise inside an aircraft cabin in order to optimize the acoustic comfort of passengers without reducing their living space. [0005] The invention aims to effectively meet this need by proposing a noise attenuating panel for a furniture element comprising:
- une coiffe d'habillage, - a dressing headdress,
- une première couche de matériau souple ayant une première densité, - a first layer of flexible material having a first density,
- une deuxième couche de matériau souple ayant une deuxième densité, et- a second layer of flexible material having a second density, and
- une troisième couche de matériau souple ayant une troisième densité. - a third layer of flexible material having a third density.
[0006] L'invention permet ainsi d'obtenir un piège sonore poreux pouvant être intégré aisément à un élément d'environnement du siège. En effet, une fois que les ondes pénètrent à l'intérieur de l'empilement de couches de matériau souple, les multiples réflexions permettent de réduire l'intensité de bruit perçue par le passager au niveau du siège. [0006] The invention thus makes it possible to obtain a porous sound trap which can be easily integrated into an environmental element of the seat. Indeed, once the waves penetrate inside the stack of layers of flexible material, the multiple reflections make it possible to reduce the intensity of noise perceived by the passenger at seat level.
[0007] Selon une réalisation de l'invention, la deuxième couche de matériau souple est munie d'une pluralité d'ouvertures traversantes. [0007] According to one embodiment of the invention, the second layer of flexible material is provided with a plurality of through openings.
[0008] Selon une réalisation de l'invention, la première couche de matériau souple, la deuxième couche de matériau souple, et la troisième couche de matériau souple sont constituées par des couches de mousse. [0008] According to one embodiment of the invention, the first layer of flexible material, the second layer of flexible material, and the third layer of flexible material are constituted by layers of foam.
[0009] Selon une réalisation de l'invention, la première densité, la deuxième densité, et la troisième densité des couches de matériau souple sont différentes les unes des autres. [0009] According to one embodiment of the invention, the first density, the second density, and the third density of the layers of flexible material are different from each other.
[0010] Selon une réalisation de l'invention, la première densité, la deuxième densité, et la troisième densité des couches de matériau souple sont égales les unes aux autres. According to one embodiment of the invention, the first density, the second density, and the third density of the layers of flexible material are equal to each other.
[0011] Selon une réalisation de l'invention, la première couche de matériau souple est perméable au son et/ou est perforée. [0011] According to one embodiment of the invention, the first layer of flexible material is permeable to sound and/or is perforated.
[0012] Selon une réalisation de l'invention, la deuxième couche de matériau souple présente une structure en treillis. [0012] According to one embodiment of the invention, the second layer of flexible material has a lattice structure.
[0013] Selon une réalisation de l'invention, la troisième couche de matériau souple est réalisée dans un matériau ayant des propriétés d'absorption acoustique supérieures à la première couche de matériau souple et à la deuxième couche de matériau souple. [0013] According to one embodiment of the invention, the third layer of flexible material is made of a material having sound absorption properties greater than the first layer of flexible material and the second layer of flexible material.
[0014] Selon une réalisation de l'invention, la première densité de la première couche de matériau souple est comprise entre 1 .5 pcf et 5.5 pcf soit entre 24.0kg/m3 et 88.1 kg/m3. [0014] According to one embodiment of the invention, the first density of the first layer of flexible material is between 1.5 pcf and 5.5 pcf, or between 24.0 kg/m3 and 88.1 kg/m3.
[0015] Selon une réalisation de l'invention, la deuxième densité de la deuxième couche de matériau souple est comprise entre 3 pcf et 7 pcf soit entre 48.0 kg/m3 et 112.1 kg/m3. [0015] According to one embodiment of the invention, the second density of the second layer of flexible material is between 3 pcf and 7 pcf, or between 48.0 kg/m3 and 112.1 kg/m3.
[0016] Selon une réalisation de l'invention, la troisième densité de la troisième couche de matériau souple est comprise entre 3 pcf et 9 pcf soit entre 48.0 kg/m3 et 144.2 kg/m3. [0016] According to one embodiment of the invention, the third density of the third layer of flexible material is between 3 pcf and 9 pcf, or between 48.0 kg/m3 and 144.2 kg/m3.
[0017] Selon une réalisation de l'invention, la troisième couche de matériau souple est destinée à être fixée directement sur une face de l'élément de mobilier. [0017] According to one embodiment of the invention, the third layer of flexible material is intended to be fixed directly on one side of the furniture element.
[0018] Selon une réalisation de l'invention, ledit panneau atténuateur de bruit comporte en outre une structure de support. [0018] According to one embodiment of the invention, said noise attenuator panel further comprises a support structure.
[0019] Selon une réalisation de l'invention, la structure de support comporte des moyens de fixation amovibles pour fixer le panneau atténuateur de bruit sur la face de l'élément de mobilier du siège. [0019] According to one embodiment of the invention, the support structure comprises removable fixing means for fixing the noise attenuating panel on the face of the seat furniture element.
[0020] Selon une réalisation de l'invention, la coiffe d'habillage est réalisée dans un matériau perméable au son. [0020] According to one embodiment of the invention, the covering cap is made of a sound-permeable material.
[0021] Selon une réalisation de l'invention, la coiffe d'habillage comporte une multitude de perforations pour faciliter le passage du son. [0021] According to one embodiment of the invention, the covering cap comprises a multitude of perforations to facilitate the passage of sound.
[0022] L'invention a également pour objet un ensemble comportant un élément de mobilier et un panneau atténuateur de bruit tel que défini précédemment fixé sur une face de l'élément de mobilier. [0022] The invention also relates to an assembly comprising a furniture element and a noise attenuating panel as defined above fixed on one face of the furniture element.
[0023] Selon une réalisation de l'invention, l'élément de mobilier est choisi parmi: une coque d'intimité destinée à s'étendre au moins en partie autour d'un siège, une console, un ottoman, ou un monument d'un premier rang ou d'un dernier rang d'une cabine d'avion. [0023] According to one embodiment of the invention, the furniture element is chosen from: a privacy shell intended to extend at least partly around a seat, console, ottoman, or monument of a front or back row of an airplane cabin.
[0024] La présente invention sera mieux comprise et d’autres caractéristiques et avantages apparaîtront encore à la lecture de la description détaillée qui suit comprenant des modes de réalisation donnés à titre illustratif en référence avec les figures annexées, présentés à titre d’exemples non limitatifs, qui pourront servir à compléter la compréhension de la présente invention et l’exposé de sa réalisation et, le cas échéant, contribuer à sa définition, sur lesquelles: [0024] The present invention will be better understood and other characteristics and advantages will appear further on reading the detailed description which follows comprising embodiments given for illustrative purposes with reference to the appended figures, presented by way of non-examples. limiting, which may serve to complete the understanding of the present invention and the presentation of its realization and, where appropriate, contribute to its definition, on which:
[0025] [Fig. 1] La figure 1 est une vue en perspective d'une unité de siège comportant un panneau atténuateur de bruit selon la présente invention; [0025] [Fig. 1] Figure 1 is a perspective view of a seat unit comprising a noise attenuating panel according to the present invention;
[0026] [Fig. 2a] La figure 2a est une vue de côté d'un panneau atténuateur de bruit selon la présente invention; [0026] [Fig. 2a] Figure 2a is a side view of a noise attenuator panel according to the present invention;
[0027] [Fig. 2b] La figure 2b est une vue de côté d'un panneau atténuateur de bruit montrant les différentes couches de matériau souple coupées de façon décalée les unes par rapport aux autres; [0027] [Fig. 2b] Figure 2b is a side view of a noise attenuator panel showing the different layers of flexible material cut offset from each other;
[0028] [Fig. 3a] La figure 3a est une vue en coupe illustrant un premier mode de réalisation suivant lequel le panneau atténuateur de bruit selon l'invention est fixé sur une face d'un élément de mobilier directement via la face d'une couche de matériau souple; [0028] [Fig. 3a] Figure 3a is a sectional view illustrating a first embodiment according to which the noise attenuating panel according to the invention is fixed to one face of a furniture element directly via the face of a layer of flexible material;
[0029] [Fig. 3b] La figure 3b est une vue en coupe illustrant un deuxième mode de réalisation suivant lequel le panneau atténuateur de bruit selon l'invention est fixé sur une face d'un élément de mobilier par l'intermédiaire d'une structure de support. [0029] [Fig. 3b] Figure 3b is a sectional view illustrating a second embodiment according to which the noise attenuating panel according to the invention is fixed on one face of a furniture element via a support structure.
[0030] Il est à noter que les éléments structurels et/ou fonctionnels communs aux différents modes de réalisation présentent les mêmes références. Ainsi, sauf mention contraire, de tels éléments disposent de propriétés structurelles, dimensionnelles et matérielles identiques. [0031] Par ailleurs, dans la suite de la description, les termes relatifs du type "avant", "arrière", "horizontal", "vertical" sont entendus par référence au sens commun que leur donnerait un passager assis sur un siège associé à l'unité de siège selon l'invention. It should be noted that the structural and/or functional elements common to the different embodiments have the same references. Thus, unless otherwise stated, such elements have identical structural, dimensional and material properties. [0031] Furthermore, in the remainder of the description, the relative terms of the type "front", "rear", "horizontal", "vertical" are understood by reference to the common sense that a passenger sitting on an associated seat would give them. to the seat unit according to the invention.
[0032] La figure 1 montre une unité de siège 10 comportant un siège 12 associé à une console latérale 13 s'étendant suivant un côté du siège 12. [0032] Figure 1 shows a seat unit 10 comprising a seat 12 associated with a side console 13 extending along one side of the seat 12.
[0033] En outre, une coque 14, dite coque d'intimité, s'étend au moins en partie autour du siège 12 de manière à délimiter un espace autour du passager. La coque 14 d'intimité est réalisée par exemple dans un matériau composite. Une telle configuration permet de garantir l'intimité du passager assis sur le siège 12. Un écran vidéo 16 d’un système multimédia ou IFE (pour "Inflight Entertainment System" en anglais) pourra être implanté sur une partie arrière de la coque 14 d’intimité de façon à être utilisable par un passager arrière. [0033] Furthermore, a shell 14, called a privacy shell, extends at least partly around the seat 12 so as to delimit a space around the passenger. The privacy shell 14 is made for example from a composite material. Such a configuration makes it possible to guarantee the privacy of the passenger seated on the seat 12. A video screen 16 of a multimedia system or IFE (for "Inflight Entertainment System" in English) could be installed on a rear part of the shell 14 d privacy so as to be usable by a rear passenger.
[0034] La console 13 pourra comporter une paroi supérieure 17 formant une table sur laquelle le passager peut poser des objets ainsi qu'un espace de stockage 18 comportant un ou plusieurs éléments parmi une pochette littérature, un porte- bouteille, ou un minibar. Le choix des rangements est configurable en fonction du souhait de la compagnie aérienne. La console 13 pourra également comporter une liseuse 19 destinée à orienter un éclairage en direction du siège 12. [0034] The console 13 may include an upper wall 17 forming a table on which the passenger can place objects as well as a storage space 18 comprising one or more elements from a literature pouch, a bottle holder, or a minibar. The choice of storage is configurable according to the wishes of the airline. The console 13 may also include a reading light 19 intended to direct lighting towards the seat 12.
[0035] Une cavité 21 est située sous la paroi supérieure 17. La cavité 21 est ouverte latéralement en direction du siège 12. En outre, une face horizontale 22 de la console 13 a notamment une fonction d'accoudoir. A cet effet, la face horizontale 22 pourra présenter localement une forme de manchette incurvée 23 épousant la forme d’une partie du bras du passager. A cavity 21 is located under the upper wall 17. The cavity 21 is open laterally towards the seat 12. In addition, a horizontal face 22 of the console 13 has in particular an armrest function. For this purpose, the horizontal face 22 may locally have the shape of a curved cuff 23 matching the shape of part of the passenger's arm.
[0036] La console 13 comporte également une unité de contrôle 25 du siège 12 et de ses composants annexes (dite "PCU" pour "Passenger Control Unit" en anglais). L'unité de contrôle 25 permet notamment au passager de commander la sélection d’une position du siège 12 ainsi que les composants annexes, tels qu'un système vidéo, un dispositif de chauffage, un système d'ambiance lumineuse ou tout autre composant annexe pouvant être intégré au siège 12. [0037] L'unité de siège 10 pourra également comporter classiquement une tablette repas 26 mobile entre une position stockée (correspondant à celle représentée sur la figure 1 ) dans laquelle la tablette repas 26 se trouve à l'intérieur d'un logement ménagé dans la console 13 et une position déployée dans laquelle la tablette repas 26 se situe à l'extérieur du logement pour permettre au passager d'y poser un plateau repas. The console 13 also includes a control unit 25 of the seat 12 and its ancillary components (called "PCU" for "Passenger Control Unit" in English). The control unit 25 allows the passenger in particular to control the selection of a position of the seat 12 as well as the ancillary components, such as a video system, a heating device, an ambient lighting system or any other ancillary component which can be integrated into seat 12. [0037] The seat unit 10 may also conventionally include a meal tablet 26 movable between a stored position (corresponding to that shown in Figure 1) in which the meal tablet 26 is located inside a housing provided in the console 13 and a deployed position in which the meal shelf 26 is located outside the housing to allow the passenger to place a meal tray there.
[0038] Le siège 12 est avantageusement pourvu d'une cinématique lui permettant d'être mobile entre une position "assise", dans laquelle le siège 12 est configuré pour définir une position assise d’un passager, et une position "allongée", dans laquelle le siège 12 est configuré pour définir une surface de couchage du passager, avantageusement sensiblement horizontale. Des positions intermédiaires de confort sont aussi proposées, telles que la position "relax" dans laquelle un dossier du siège 12 est fortement incliné. The seat 12 is advantageously provided with kinematics allowing it to be movable between a "seated" position, in which the seat 12 is configured to define a seated position of a passenger, and a "lying" position, in which the seat 12 is configured to define a sleeping surface for the passenger, advantageously substantially horizontal. Intermediate comfort positions are also offered, such as the "relax" position in which a back of the seat 12 is strongly inclined.
[0039] Afin de permettre l'allongement du passager, la console 13 comporte un logement 27 vu par transparence sur la figure 1 dans lequel est disposé un ottoman 28. L'ottoman 28 comporte une face horizontale formant repose-pieds sur lequel un passager arrière pourra poser ses pieds lorsque le siège 12 se trouve en position "allongée". [0039] In order to allow the passenger to lie down, the console 13 comprises a housing 27 seen through transparency in FIG. 1 in which an ottoman 28 is arranged. The ottoman 28 has a horizontal face forming a footrest on which a passenger rear will be able to place his feet when the seat 12 is in the "lying" position.
[0040] Le siège 12 comporte un axe d’extension X1 défini par l'intersection entre un plan horizontal et un plan médian vertical du siège 12 correspondant à un plan de symétrie du siège 12. L'axe d’extension X1 du siège 12 pourra former un angle non nul par rapport à une direction parallèle ou confondu avec un axe central de l'avion X2. En l'occurrence, le siège 12 est tourné en direction de l'axe X2. En variante, le siège 12 pourra être tourné dans une direction opposée à l'axe X2. The seat 12 comprises an extension axis X1 defined by the intersection between a horizontal plane and a vertical median plane of the seat 12 corresponding to a plane of symmetry of the seat 12. The extension axis X1 of the seat 12 will be able to form a non-zero angle with respect to a direction parallel to or coincident with a central axis of the aircraft X2. In this case, the seat 12 is turned towards the axis X2. Alternatively, the seat 12 can be rotated in a direction opposite to the axis X2.
[0041] Avantageusement, un panneau atténuateur de bruit 30 est fixé sur une face de la coque d'intimité 14. Le panneau atténuateur de bruit 30 pourra être fixé sur une face avant de la coque d'intimité 14 située du côté du siège 12. En variante ou en complément, le panneau atténuateur de bruit 30 pourra être fixé sur la face arrière de la coque d'intimité 14. Le panneau atténuateur de bruit 30 pourra également être fixé sur une face de la console latérale 13 située du côté du siège 12 ou autour de l'ottoman 28. Ainsi, le panneau atténuateur de bruit 30 pourra être fixé sur un ou plusieurs éléments de mobilier du siège 12, notamment choisis parmi: la coque d'intimité 14, la console 13, ou l'ottoman 28. Alternativement, l'élément de mobilier sur lequel est fixé le panneau atténuateur de bruit 30 pourra être constitué par un monument d'un premier rang ou d'un dernier rang d'une cabine d'avion. Ce monument pourra comporter des rangements et/ou un repose-pieds pour un siège d'un rang extrême d'une cabine d'avion. [0041] Advantageously, a noise attenuating panel 30 is fixed on one face of the privacy shell 14. The noise attenuating panel 30 can be fixed on a front face of the privacy shell 14 located on the side of the seat 12 As a variant or in addition, the noise attenuating panel 30 could be fixed on the rear face of the privacy shell 14. The noise attenuating panel 30 could also be fixed on one side of the side console 13 located on the side of the seat 12 or around the ottoman 28. Thus, the noise attenuating panel 30 can be fixed on one or more furniture elements of the seat 12, in particular chosen from: the privacy shell 14, the console 13, or the ottoman 28. Alternatively, the furniture element on which the noise attenuating panel 30 is fixed may be constituted by a monument of a first row or a last row of an airplane cabin. This monument may include storage space and/or a footrest for an extreme row seat in an airplane cabin.
[0042] Comme on peut le voir sur les figures 2a et 2b, le panneau atténuateur de bruit 30 comporte une coiffe d'habillage 31 , une première couche de matériau souple 32.1 ayant une première densité D1 , une deuxième couche de matériau souple 32.2 ayant une deuxième densité D2, et une troisième couche de matériau souple 32.3 ayant une troisième densité D3. La première couche de matériau souple 32.1 , la deuxième couche de matériau souple 32.2, et la troisième couche de matériau souple 32.3 sont trois couches distinctes et empilées les unes sur les autres. La deuxième couche de matériau souple 32.2 est de préférence munie d'une pluralité d'ouvertures traversantes 33. [0042] As can be seen in Figures 2a and 2b, the noise attenuator panel 30 comprises a covering cap 31, a first layer of flexible material 32.1 having a first density D1, a second layer of flexible material 32.2 having a second density D2, and a third layer of flexible material 32.3 having a third density D3. The first layer of flexible material 32.1, the second layer of flexible material 32.2, and the third layer of flexible material 32.3 are three distinct layers stacked on top of each other. The second layer of flexible material 32.2 is preferably provided with a plurality of through openings 33.
[0043] La première densité D1 , la deuxième densité D2, et la troisième densité D3 des couches de matériau souple 32.1 , 32.2, 32.3 peuvent être différentes les unes des autres. Alternativement, la première densité D1 , la deuxième densité D2, et la troisième densité D3 des couches de matériau souple sont égales les unes aux autres. Alternativement, la première densité D1 et la deuxième densité D2 sont égales entre elles et différentes par rapport à la troisième densité D3. Alternativement, la troisième densité D3 est spécifique, c’est-à-dire différente, ou égale à la première densité D1 ou à la deuxième densité D2. The first density D1, the second density D2, and the third density D3 of the layers of flexible material 32.1, 32.2, 32.3 can be different from each other. Alternatively, the first density D1, the second density D2, and the third density D3 of the layers of flexible material are equal to each other. Alternatively, the first density D1 and the second density D2 are equal to each other and different with respect to the third density D3. Alternatively, the third density D3 is specific, that is to say different from, or equal to, the first density D1 or the second density D2.
[0044] De préférence, la première couche de matériau souple 32.1 , la deuxième couche de matériau souple 32.2, et la troisième couche de matériau souple 32.3 sont constituées par des couches de mousse. En variante, il est possible d'utiliser un matériau fibreux, un matériau non tissé, un matériau à base de ouate, ou tout autre matériau souple adapté pour former les couches 32.1 , 32.2, 32.3 ou un mélange de ces matériaux. Preferably, the first layer of flexible material 32.1, the second layer of flexible material 32.2, and the third layer of flexible material 32.3 are constituted by layers of foam. Alternatively, it is possible to use a fibrous material, a non-woven material, a wadding-based material, or any other flexible material suitable for forming layers 32.1, 32.2, 32.3 or a mixture of these materials.
[0045] Plus précisément, la coiffe d'habillage 31 est réalisée dans un matériau perméable au son. Le matériau de la coiffe d'habillage 31 est également choisi pour conférer une finition esthétique à l'ensemble. La coiffe d'habillage 31 pourra par exemple être réalisée dans un matériau de type textile, cuir, similicuir, alcantara, ou tout autre matériau flexible adapté à l'application. Le matériau utilisé pourra comporter une multitude de perforations pour faciliter le passage du son. La coiffe d'habillage 31 pourra présenter des motifs décoratifs sur ses parties visibles lorsque le panneau atténuateur de bruit 30 est mis en place sur l'élément de mobilier 13, 14, 28 du siège 12. Ces motifs décoratifs pourront être personnalisés en fonction de la compagnie aérienne. More precisely, the covering cap 31 is made of a sound-permeable material. The material of the covering cap 31 is also chosen to give an aesthetic finish to the whole. The covering cap 31 could for example be made of a textile type material, leather, imitation leather, alcantara, or any other flexible material suitable for the application. The material used may have a multitude of perforations to facilitate the passage of sound. The covering cap 31 may have decorative patterns on its visible parts when the noise attenuating panel 30 is placed on the furniture element 13, 14, 28 of the seat 12. These decorative patterns may be personalized according to the airline company.
[0046] De préférence, la première couche de matériau souple 32.1 est perméable au son et/ou est perforée. La première couche de matériau souple 32.1 peut avoir également une fonction de finition pour que le panneau atténuateur de bruit 30 présente un aspect extérieur uniforme sans déformation de surface due à la présence des ouvertures traversantes 33 réalisées dans la deuxième couche de matériau souple 32.2. La première densité D1 de la première couche de matériau souple 32.1 est par exemple comprise entre 1 .5 pcf et 5.5 pcf soit entre 24.0 kg/m3 et 88.1 kg/m3. Preferably, the first layer of flexible material 32.1 is permeable to sound and/or is perforated. The first layer of flexible material 32.1 can also have a finishing function so that the noise attenuating panel 30 has a uniform external appearance without surface deformation due to the presence of the through openings 33 made in the second layer of flexible material 32.2. The first density D1 of the first layer of flexible material 32.1 is for example between 1.5 pcf and 5.5 pcf, or between 24.0 kg/m3 and 88.1 kg/m3.
[0047] La deuxième couche de matériau souple 32.2 présente une structure en treillis, notamment à mailles en forme de losange. Cette structure en treillis comporte une pluralité de bras 35 délimitant les ouvertures traversantes 33. Deux ouvertures traversantes 33 adjacentes sont délimitées entre elles par un bras 35 commun. Les bras 35 présentent des formes de tiges allongées. Les bras 35 sont en l'occurrence agencés en losanges et les ouvertures traversantes 33 de forme correspondante présentent également une forme de losange. La forme des ouvertures traversantes 33 ne se limite toutefois pas à une forme en losange. En effet, les ouvertures traversantes 33 peuvent présenter toute forme géométrique possible, telle qu’une forme circulaire, rectangulaire, carrée, triangulaire, ovale, hexagonale, ou autre. La deuxième densité D2 de la deuxième couche de matériau souple 32.2 est par exemple comprise entre 3 pcf et 7 pcf soit entre 48.0 kg/m3 et 1 12.1 kg/m3. The second layer of flexible material 32.2 has a lattice structure, in particular diamond-shaped mesh. This lattice structure comprises a plurality of arms 35 delimiting the through openings 33. Two adjacent through openings 33 are delimited between them by a common arm 35. The arms 35 have the shape of elongated rods. The arms 35 are in this case arranged in a diamond shape and the through openings 33 of corresponding shape also have a diamond shape. The shape of the through openings 33 is however not limited to a diamond shape. Indeed, the through openings 33 can have any possible geometric shape, such as a circular, rectangular, square, triangular, oval, hexagonal, or other shape. The second density D2 of the second layer of flexible material 32.2 is for example between 3 pcf and 7 pcf, or between 48.0 kg/m3 and 1 12.1 kg/m3.
[0048] La troisième couche de matériau souple 32.3 est réalisée dans un matériau ayant des propriétés d'absorption acoustique supérieures à la première couche de matériau souple 32.1 et à la deuxième couche de matériau souple 32.2. La troisième densité D3 de la troisième couche de matériau souple 32.3 est par exemple comprise entre 3 pcf et 9 pcf soit entre 48.0 kg/m3 et 144.2 kg/m3. La troisième couche de matériau souple 32.3 pourra être chargée en graphite. Cela permet de conférer au panneau atténuateur de bruit 30 la performance nécessaire pour passer les tests de résistance au feu. The third layer of flexible material 32.3 is made of a material having sound absorption properties greater than the first layer of flexible material 32.1 and to the second layer of flexible material 32.2. The third density D3 of the third layer of flexible material 32.3 is for example between 3 pcf and 9 pcf, or between 48.0 kg/m3 and 144.2 kg/m3. The third layer of flexible material 32.3 can be loaded with graphite. This gives the noise attenuator panel 30 the performance necessary to pass fire resistance tests.
[0049] De préférence, la deuxième couche de matériau souple 32.2 est disposée entre la première couche de matériau souple 32.1 et la troisième couche de matériau souple 32.3. Toutefois, le positionnement des couches de matériau souple 32.1 , 32.2, 32.3 les unes par rapport aux autres à l'intérieur de l'empilement pourra varier en fonction de l'application. Preferably, the second layer of flexible material 32.2 is placed between the first layer of flexible material 32.1 and the third layer of flexible material 32.3. However, the positioning of the layers of flexible material 32.1, 32.2, 32.3 relative to each other inside the stack may vary depending on the application.
[0050] Comme cela est illustré par la figure 3a, le panneau atténuateur de bruit 30 constitue un piège à son basé sur le principe d'Helmholtz de réflexion du son. En effet, une onde sonore 38 traverse la coiffe d'habillage 31 et après avoir été atténuée en partie par la première couche de matériau souple 32.1 , l'onde sonore 38 est réfléchie à l'intérieur de la deuxième couche de matériau souple 32.2 et de la troisième couche de matériau souple 32.3 jouant ensemble un rôle de résonateur poreux. Suite aux multiples réflexions à l'intérieur des couches de matériau souple, l'intensité de l'onde sonore 38 sortant du panneau atténuateur de bruit 30 est très faible. Le bruit perçu par le passager au niveau du siège 12 est ainsi grandement réduit. As illustrated in Figure 3a, the noise attenuator panel 30 constitutes a sound trap based on the Helmholtz principle of sound reflection. Indeed, a sound wave 38 passes through the covering cap 31 and after having been partly attenuated by the first layer of flexible material 32.1, the sound wave 38 is reflected inside the second layer of flexible material 32.2 and of the third layer of flexible material 32.3 playing together a role of porous resonator. Following the multiple reflections inside the layers of flexible material, the intensity of the sound wave 38 leaving the noise attenuator panel 30 is very low. The noise perceived by the passenger at seat 12 is thus greatly reduced.
[0051] Dans le mode de réalisation de la figure 3a, la troisième couche de matériau souple 32.3 est fixée directement sur une face de l'élément de mobilier 13, 14, 28, c’est-à-dire sans structure de support 40 intermédiaire. De préférence, la fixation de la troisième couche de matériau souple 32.3 sur la face de l'élément de mobilier 13, 14, 28 est réalisée par collage. [0051] In the embodiment of Figure 3a, the third layer of flexible material 32.3 is fixed directly on one face of the furniture element 13, 14, 28, that is to say without support structure 40 intermediate. Preferably, the fixing of the third layer of flexible material 32.3 on the face of the furniture element 13, 14, 28 is carried out by gluing.
[0052] Une épaisseur E totale du panneau atténuateur de bruit 30 pourra être comprise entre 1 mm et 50mm et vaut de préférence entre 12mm et 15mm inclus. Pour un panneau atténuateur de bruit 30 destiné à être fixé sur une face d'une coque d'intimité 14, l'épaisseur de la coiffe d'habillage 31 est par exemple de l'ordre de 1 mm, l'épaisseur de la première couche de matériau souple 32.1 est de l'ordre de 2mm, l'épaisseur de la deuxième couche de matériau souple 32.2 est de l'ordre de 5mm, et l'épaisseur de la troisième couche de matériau souple 32.3 est de l'ordre de 5mm également. Par "de l'ordre de", on entend une variation de plus ou moins 60% autour de la valeur indiquée. [0052] A total thickness E of the noise attenuator panel 30 may be between 1 mm and 50 mm and is preferably between 12 mm and 15 mm inclusive. For a noise attenuating panel 30 intended to be fixed on one face of a privacy shell 14, the thickness of the covering cap 31 is for example of the order of 1 mm, the thickness of the first layer of flexible material 32.1 is of the order of 2mm, the thickness of the second layer of flexible material 32.2 is of the order of 5mm, and the thickness of the third layer of flexible material 32.3 is also of the order of 5mm. By "of the order of", we mean a variation of plus or minus 60% around the indicated value.
[0053] Alternativement, dans le mode de réalisation de la figure 3b, on prévoit en outre une structure de support 40 destinée à être fixée sur la face de l'élément de mobilier 13, 14, 28. Dans ce mode de réalisation, la coiffe d'habillage 31 est munie d'un rabat fixé contre un bord de la structure de support 40. La fixation du rabat sur la structure de support 40 pourra être effectuée par collage, rivetage, insertion dans une gorge de retenue, ou toute autre technique de fixation adaptée à l'application avec ou sans collage. [0053] Alternatively, in the embodiment of Figure 3b, there is also provided a support structure 40 intended to be fixed on the face of the furniture element 13, 14, 28. In this embodiment, the covering cap 31 is provided with a flap fixed against an edge of the support structure 40. The flap is fixed on the support structure 40 can be carried out by gluing, riveting, insertion into a retaining groove, or any other fixing technique adapted to the application with or without gluing.
[0054] La structure de support 40 est avantageusement réalisée dans un matériau plastique, notamment thermoformé, un matériau métallique, tel que de l'aluminium, ou dans un matériau en mousse à très haute densité. La structure de support 40 présente une épaisseur faible, par exemple comprise entre 0.5mm et 3mm. Suivant un exemple de mise en oeuvre, on utilise une structure de support 40 constituée par une plaque réalisée dans un matériau thermoplastique. Cette plaque est chauffée puis mise en forme à l'aide d'une matrice. Une fois refroidie, la plaque thermoformée conserve la forme imprimée par la matrice. [0054] The support structure 40 is advantageously made of a plastic material, in particular thermoformed, a metallic material, such as aluminum, or a very high density foam material. The support structure 40 has a low thickness, for example between 0.5mm and 3mm. According to an example of implementation, a support structure 40 is used consisting of a plate made of a thermoplastic material. This plate is heated then shaped using a matrix. Once cooled, the thermoformed plate retains the shape printed by the die.
[0055] Par ailleurs, la structure de support 40 comporte des moyens de fixation 41 amovibles pour fixer l'ensemble "coiffe d'habillage 31 -couches 32.1 , 32.2, 32.3 - structure de support 40" sur la face de l'élément de mobilier 13, 14, 28. Le choix des moyens de fixation 41 dépend notamment des contraintes d'intégration de l'ensemble et de son positionnement dans l'unité de siège 12. Dans le cas où l'ensemble est disposé dans une zone visible de l'unité de siège 12, on utilise de préférence des moyens de fixation 41 discrets et démontables sans l'aide d'outil, comme par exemple des dispositifs d'encliquetage, des attaches dites "Velcro" (marque déposée) formées par des boucles et des crochets complémentaires, des boutons à pression, des attaches magnétiques, ou tout autre dispositif de fixation adapté à l'application. [0056] Dans le cas où l'ensemble est disposé dans une zone non visible de l'unité de siège 12, notamment une zone technique située en partie basse de l'unité de siège 12, on pourra utiliser des vis pour fixer la structure de support 40 sur l'élément de mobilier 13, 14, 28. Alternativement, il est également possible d'utiliser des pions sapins ou tout autre moyen de fixation adapté à l'application. Ce type de moyens de fixation 41 permet de garantir la retenue du panneau atténuateur de bruit 30 dans le cadre de tests de certification au cours desquels des décélérations importantes sont appliquées à l'unité de siège 12. [0055] Furthermore, the support structure 40 comprises removable fixing means 41 for fixing the assembly "dressing cap 31 - layers 32.1, 32.2, 32.3 - support structure 40" on the face of the element of furniture 13, 14, 28. The choice of fixing means 41 depends in particular on the integration constraints of the assembly and its positioning in the seat unit 12. In the case where the assembly is arranged in a visible area of the seat unit 12, discreet and removable fixing means 41 are preferably used without the use of tools, such as for example snap-fit devices, so-called "Velcro" fasteners (registered trademark) formed by Complementary loops and hooks, snaps, magnetic fasteners, or any other fastening device suitable for the application. [0056] In the case where the assembly is arranged in a non-visible zone of the seat unit 12, in particular a technical zone located in the lower part of the seat unit 12, screws can be used to fix the structure support 40 on the furniture element 13, 14, 28. Alternatively, it is also possible to use fir pins or any other fixing means suitable for the application. This type of fixing means 41 makes it possible to guarantee the retention of the noise attenuating panel 30 in the context of certification tests during which significant decelerations are applied to the seat unit 12.
[0057] Un jeu 42 de quelques millimètres, notamment compris entre 1 mm et 15mm et valant de préférence 3mm, est prévu entre la structure de support 40 et l'élément de mobilier 13, 14, 28. Un tel jeu permet de certifier les pièces indépendamment. [0057] A clearance 42 of a few millimeters, in particular between 1 mm and 15 mm and preferably worth 3 mm, is provided between the support structure 40 and the furniture element 13, 14, 28. Such clearance makes it possible to certify the parts independently.
[0058] Bien entendu, les différentes caractéristiques, variantes et/ou formes de réalisation de la présente invention peuvent être associées les unes avec les autres selon diverses combinaisons dans la mesure où elles ne sont pas incompatibles ou exclusives les unes des autres. [0058] Of course, the different characteristics, variants and/or embodiments of the present invention can be associated with each other in various combinations to the extent that they are not incompatible or exclusive of each other.
[0059] En outre, l'invention n'est pas limitée aux modes de réalisation décrits précédemment et fournis uniquement à titre d'exemple. Elle englobe diverses modifications, formes alternatives et autres variantes que pourra envisager l'homme du métier dans le cadre de la présente invention et notamment toutes combinaisons des différents modes de fonctionnement décrits précédemment, pouvant être pris séparément ou en association. [0059] Furthermore, the invention is not limited to the embodiments described above and provided solely by way of example. It encompasses various modifications, alternative forms and other variants that those skilled in the art may consider in the context of the present invention and in particular all combinations of the different modes of operation described above, which can be taken separately or in combination.

Claims

REVENDICATIONS Panneau atténuateur de bruit (30) pour un élément de mobilier (13, 14, 28), caractérisé en ce que ledit panneau atténuateur de bruit (30) comporte: CLAIMS Noise attenuating panel (30) for a furniture element (13, 14, 28), characterized in that said noise attenuating panel (30) comprises:
- une coiffe d'habillage (31 ), - a covering cap (31),
- une première couche de matériau souple (32.1 ) ayant une première densité (D1 ), - a first layer of flexible material (32.1) having a first density (D1),
- une deuxième couche de matériau souple (32.2) ayant une deuxième densité (D2), et - a second layer of flexible material (32.2) having a second density (D2), and
- une troisième couche de matériau souple (32.3) ayant une troisième densité (03), - a third layer of flexible material (32.3) having a third density (03),
- la première couche de matériau souple (32.1 ), la deuxième couche de matériau souple (32.2), et la troisième couche de matériau souple (32.3) étant constituées par des couches de mousse, - the first layer of flexible material (32.1), the second layer of flexible material (32.2), and the third layer of flexible material (32.3) being constituted by layers of foam,
- la deuxième couche de matériau souple (32.2) présentant une structure en treillis. Panneau atténuateur de bruit selon la revendication 1 , caractérisé en ce que la deuxième couche de matériau souple (32.2) est munie d'une pluralité d'ouvertures traversantes (33). Panneau atténuateur de bruit selon la revendication 1 ou 2, caractérisé en ce que la première densité (D1 ), la deuxième densité (D2), et la troisième densité (D3) des couches de matériau souple sont différentes les unes des autres. Panneau atténuateur de bruit selon la revendication 1 ou 2, caractérisé en ce que la première densité (D1 ), la deuxième densité (D2), et la troisième densité (D3) des couches de matériau souple sont égales les unes aux autres. Panneau atténuateur de bruit selon l'une quelconque des revendications 1 à- the second layer of flexible material (32.2) having a lattice structure. Noise attenuating panel according to claim 1, characterized in that the second layer of flexible material (32.2) is provided with a plurality of through openings (33). Noise attenuating panel according to claim 1 or 2, characterized in that the first density (D1), the second density (D2), and the third density (D3) of the layers of flexible material are different from each other. Noise attenuating panel according to claim 1 or 2, characterized in that the first density (D1), the second density (D2), and the third density (D3) of the layers of flexible material are equal to each other. Noise attenuator panel according to any one of claims 1 to
4, caractérisé en ce que la première couche de matériau souple (32.1 ) est perméable au son et/ou est perforée. Panneau atténuateur de bruit selon l'une quelconque des revendications 1 à4, characterized in that the first layer of flexible material (32.1) is permeable to sound and/or is perforated. Noise attenuator panel according to any one of claims 1 to
5, caractérisé en ce que la troisième couche de matériau souple (32.3) est réalisée dans un matériau ayant des propriétés d'absorption acoustique supérieures à la première couche de matériau souple (32.1 ) et à la deuxième couche de matériau souple (32.2). Panneau atténuateur de bruit selon l'une quelconque des revendications 1 à5, characterized in that the third layer of flexible material (32.3) is made of a material having sound absorption properties superior to the first layer of flexible material (32.1) and the second layer of flexible material (32.2). Noise attenuator panel according to any one of claims 1 to
6, caractérisé en ce que la première densité (D1 ) de la première couche de matériau souple (32.1 ) est comprise entre 1.5 pcf et 5.5 pcf soit entre 24.0 kg/m3 et 88.1 kg/m3. Panneau atténuateur de bruit selon l'une quelconque des revendications 1 à6, characterized in that the first density (D1) of the first layer of flexible material (32.1) is between 1.5 pcf and 5.5 pcf, or between 24.0 kg/m3 and 88.1 kg/m3. Noise attenuator panel according to any one of claims 1 to
7, caractérisé en ce que la deuxième densité (D2) de la deuxième couche de matériau souple (32.2) est comprise entre 3 pcf et 7 pcf soit entre 48.0 kg/m3 et 112.1 kg/m3. Panneau atténuateur de bruit selon l'une quelconque des revendications 1 à7, characterized in that the second density (D2) of the second layer of flexible material (32.2) is between 3 pcf and 7 pcf, or between 48.0 kg/m3 and 112.1 kg/m3. Noise attenuator panel according to any one of claims 1 to
8, caractérisé en ce que la troisième densité (D3) de la troisième couche de matériau souple (32.3) est comprise entre 3 pc et 9 pcf soit entre 48.0 kg/m3 et 144.2 kg/m3. Panneau atténuateur de bruit selon l'une quelconque des revendications 1 à8, characterized in that the third density (D3) of the third layer of flexible material (32.3) is between 3 pc and 9 pcf, or between 48.0 kg/m3 and 144.2 kg/m3. Noise attenuator panel according to any one of claims 1 to
9, caractérisé en ce que la troisième couche de matériau souple (32.3) est destinée à être fixée directement sur une face de l'élément de mobilier (13, 14, 28). Panneau atténuateur de bruit selon l'une quelconque des revendications 1 à9, characterized in that the third layer of flexible material (32.3) is intended to be fixed directly on one face of the furniture element (13, 14, 28). Noise attenuator panel according to any one of claims 1 to
10, caractérisé en ce qu'il comporte en outre une structure de support (40). Panneau atténuateur de bruit selon la revendication 11 , caractérisé en ce que la structure de support (40) comporte des moyens de fixation (41 ) amovibles pour fixer le panneau atténuateur de bruit (30) sur la face de l'élément de mobilier (13, 14, 28) du siège (12). Panneau atténuateur de bruit selon l'une quelconque des revendications 1 à 12, caractérisé en ce que la coiffe d'habillage (31 ) est réalisée dans un matériau perméable au son. Panneau atténuateur de bruit selon l'une quelconque des revendications 1 à 13, caractérisé en ce que la coiffe d'habillage (31 ) comporte une multitude de perforations pour faciliter le passage du son. Ensemble comportant un élément de mobilier (13, 14, 28) et un panneau atténuateur de bruit (30) défini selon l'une quelconque des revendications précédentes fixé sur une face de l'élément de mobilier (13, 14, 28). Ensemble selon la revendication 15, caractérisé en ce que l'élément de mobilier est choisi parmi: une coque d'intimité (14) destinée à s'étendre au moins en partie autour d'un siège (12), une console (13), un ottoman (28), ou un monument d'un premier rang ou d'un dernier rang d'une cabine d'avion. 10, characterized in that it further comprises a support structure (40). Noise attenuating panel according to claim 11, characterized in that the support structure (40) comprises removable fixing means (41) for fixing the noise attenuating panel (30) on the face of the furniture element (13). , 14, 28) of the seat (12). Noise attenuating panel according to any one of claims 1 to 12, characterized in that the covering cap (31) is made of a sound-permeable material. Noise attenuating panel according to any one of claims 1 to 13, characterized in that the covering cap (31) has a multitude of perforations to facilitate the passage of sound. Assembly comprising a furniture element (13, 14, 28) and a noise attenuating panel (30) defined according to any one of the preceding claims fixed on one face of the furniture element (13, 14, 28). Assembly according to claim 15, characterized in that the furniture element is chosen from: a privacy shell (14) intended to extend at least partly around a seat (12), a console (13) , an Ottoman (28), or a monument of a first or last row of an airplane cabin.
PCT/EP2023/055589 2022-03-18 2023-03-06 Noise attenuating panel for a piece of furniture WO2023174727A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR2202397A FR3133576A1 (en) 2022-03-18 2022-03-18 NOISE ATTENUATING PANEL FOR AN ELEMENT OF FURNITURE
FRFR2202397 2022-03-18

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060021823A1 (en) * 2004-07-29 2006-02-02 Nishikawa Rubber Co., Ltd. Noise isolation sheet
US20090173571A1 (en) * 2008-01-07 2009-07-09 Pelzer Acoustic Products, Llc Aircraft Trim Panel with Integrated Adjustable Acoustic Properties
WO2019050680A1 (en) * 2017-09-07 2019-03-14 The Nordam Group, Inc. Acoutic abatement panel fabrication

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060021823A1 (en) * 2004-07-29 2006-02-02 Nishikawa Rubber Co., Ltd. Noise isolation sheet
US20090173571A1 (en) * 2008-01-07 2009-07-09 Pelzer Acoustic Products, Llc Aircraft Trim Panel with Integrated Adjustable Acoustic Properties
WO2019050680A1 (en) * 2017-09-07 2019-03-14 The Nordam Group, Inc. Acoutic abatement panel fabrication

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